kcrash.log

[   86.518780] BTRFS info (device dm-0): disk space caching is enabled
[   86.880129] BTRFS: detected SSD devices, enabling SSD mode
[  107.177906] BTRFS warning (device dm-0): block group 1103101952 has wrong amount of free space
[  107.177910] BTRFS warning (device dm-0): failed to load free space cache for block group 1103101952, rebuild it now
[  107.636877] BTRFS warning (device dm-0): block group 667322155008 has wrong amount of free space
[  107.636881] BTRFS warning (device dm-0): failed to load free space cache for block group 667322155008, rebuild it now
[  108.019945] BTRFS warning (device dm-0): block group 668395896832 has wrong amount of free space
[  108.019950] BTRFS warning (device dm-0): failed to load free space cache for block group 668395896832, rebuild it now
[  111.901235] BTRFS warning (device dm-0): block group 7545552896 has wrong amount of free space
[  111.901238] BTRFS warning (device dm-0): failed to load free space cache for block group 7545552896, rebuild it now
[  111.997666] BTRFS warning (device dm-0): block group 29020389376 has wrong amount of free space
[  111.997669] BTRFS warning (device dm-0): failed to load free space cache for block group 29020389376, rebuild it now
[  112.003385] BTRFS warning (device dm-0): block group 31167873024 has wrong amount of free space
[  112.003388] BTRFS warning (device dm-0): failed to load free space cache for block group 31167873024, rebuild it now
[  112.017778] BTRFS warning (device dm-0): block group 35462840320 has wrong amount of free space
[  112.017783] BTRFS warning (device dm-0): failed to load free space cache for block group 35462840320, rebuild it now
[  114.178522] BTRFS warning (device dm-0): block group 533641297920 has wrong amount of free space
[  114.178526] BTRFS warning (device dm-0): failed to load free space cache for block group 533641297920, rebuild it now
[  114.212841] BTRFS warning (device dm-0): block group 663027187712 has wrong amount of free space
[  114.212845] BTRFS warning (device dm-0): failed to load free space cache for block group 663027187712, rebuild it now
[  114.221880] BTRFS warning (device dm-0): block group 664100929536 has wrong amount of free space
[  114.221894] BTRFS warning (device dm-0): failed to load free space cache for block group 664100929536, rebuild it now
[  114.261584] BTRFS warning (device dm-0): block group 666248413184 has wrong amount of free space
[  114.261588] BTRFS warning (device dm-0): failed to load free space cache for block group 666248413184, rebuild it now
[  114.407156] BTRFS warning (device dm-0): block group 669469638656 has wrong amount of free space
[  114.407160] BTRFS warning (device dm-0): failed to load free space cache for block group 669469638656, rebuild it now
[  114.413914] BTRFS warning (device dm-0): block group 333426196480 has wrong amount of free space
[  114.413917] BTRFS warning (device dm-0): failed to load free space cache for block group 333426196480, rebuild it now
[  114.435285] BTRFS warning (device dm-0): block group 342016131072 has wrong amount of free space
[  114.435288] BTRFS warning (device dm-0): failed to load free space cache for block group 342016131072, rebuild it now
[  114.596324] BTRFS warning (device dm-0): block group 670543380480 has wrong amount of free space
[  114.596327] BTRFS warning (device dm-0): failed to load free space cache for block group 670543380480, rebuild it now
[  114.657184] BTRFS warning (device dm-0): block group 423083638784 has wrong amount of free space
[  114.657193] BTRFS warning (device dm-0): failed to load free space cache for block group 423083638784, rebuild it now
[  114.687195] BTRFS warning (device dm-0): block group 438116024320 has wrong amount of free space
[  114.687198] BTRFS warning (device dm-0): failed to load free space cache for block group 438116024320, rebuild it now
[  114.707862] BTRFS warning (device dm-0): block group 443484733440 has wrong amount of free space
[  114.707865] BTRFS warning (device dm-0): failed to load free space cache for block group 443484733440, rebuild it now
[  115.664795] BTRFS warning (device dm-0): block group 484823793664 has wrong amount of free space
[  115.664799] BTRFS warning (device dm-0): failed to load free space cache for block group 484823793664, rebuild it now
[  116.750243] BTRFS warning (device dm-0): block group 534715039744 has wrong amount of free space
[  116.750248] BTRFS warning (device dm-0): failed to load free space cache for block group 534715039744, rebuild it now
[  117.124834] BTRFS warning (device dm-0): block group 634036158464 has wrong amount of free space
[  117.124837] BTRFS warning (device dm-0): failed to load free space cache for block group 634036158464, rebuild it now
[  117.146007] BTRFS warning (device dm-0): block group 653363511296 has wrong amount of free space
[  117.146011] BTRFS warning (device dm-0): failed to load free space cache for block group 653363511296, rebuild it now
[  117.164914] BTRFS warning (device dm-0): block group 656584736768 has wrong amount of free space
[  117.164919] BTRFS warning (device dm-0): failed to load free space cache for block group 656584736768, rebuild it now
[  117.172951] BTRFS warning (device dm-0): block group 659805962240 has wrong amount of free space
[  117.172954] BTRFS warning (device dm-0): failed to load free space cache for block group 659805962240, rebuild it now
[  117.183867] BTRFS warning (device dm-0): block group 675912089600 has wrong amount of free space
[  117.183871] BTRFS warning (device dm-0): failed to load free space cache for block group 675912089600, rebuild it now
[  117.190265] BTRFS warning (device dm-0): block group 682354540544 has wrong amount of free space
[  117.190268] BTRFS warning (device dm-0): failed to load free space cache for block group 682354540544, rebuild it now
[  117.288248] BTRFS warning (device dm-0): block group 694165700608 has wrong amount of free space
[  117.288253] BTRFS warning (device dm-0): failed to load free space cache for block group 694165700608, rebuild it now
[  596.664162] SysRq : Show backtrace of all active CPUs
[  596.667299] sending NMI to all CPUs:
[  596.667336] NMI backtrace for cpu 0
[  596.667340] CPU: 0 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  596.667342] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  596.667349] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  596.667352] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  596.667354] RIP: 0010:[<ffffffff8138ec87>]  [<ffffffff8138ec87>] rb_next+0x27/0x50
[  596.667359] RSP: 0018:ffff8801de5cb508  EFLAGS: 00000286
[  596.667361] RAX: ffff88008f89e7c0 RBX: ffff8801de5cb5e8 RCX: ffff8801de5cb5e8
[  596.667363] RDX: 0000000000000000 RSI: ffff880036627524 RDI: ffff88008f89e780
[  596.667364] RBP: ffff8801de5cb508 R08: 0000000000000001 R09: 000000000063c000
[  596.667366] R10: 0000000000000001 R11: 0000000000000002 R12: 00000000004d2000
[  596.667367] R13: ffff8800a0363780 R14: ffff8800a0363780 R15: ffff880036627500
[  596.667373] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  596.667374] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  596.667376] CR2: 00007f4eb642d000 CR3: 0000000036063000 CR4: 00000000001406f0
[  596.667379] Stack:
[  596.667380]  ffff8801de5cb588 ffffffffc0400d12 0000000000008000 ffff8800a0363780
[  596.667383]  ffff8801dedf2ac0 ffff8800ea9c1000 ffff88008f89e780 00000000000c0000
[  596.667386]  000000000063c000 000000000083c000 ffff8801de5cb588 ffff8801de5cb5e8
[  596.667389] Call Trace:
[  596.667414]  [<ffffffffc0400d12>] setup_cluster_no_bitmap+0xe2/0x260 [btrfs]
[  596.667429]  [<ffffffffc0403eba>] btrfs_find_space_cluster+0x12a/0x2f0 [btrfs]
[  596.667439]  [<ffffffffc03a9738>] find_free_extent+0x468/0xc50 [btrfs]
[  596.667449]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  596.667461]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  596.667472]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  596.667485]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  596.667497]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  596.667502]  [<ffffffff811a2900>] ? SyS_msync+0x230/0x230
[  596.667513]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  596.667525]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  596.667536]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  596.667547]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  596.667557]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  596.667561]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  596.667564]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  596.667567]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  596.667571]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  596.667574]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  596.667577]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  596.667580]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  596.667582]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  596.667585]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  596.667589]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  596.667593]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  596.667597]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  596.667600]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  596.667604]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  596.667607]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  596.667610]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  596.667614]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  596.667616]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  596.667618] Code: 1f 44 00 00 55 48 8b 17 31 c0 48 89 e5 48 39 d7 74 1e 48 8b 47 08 48 85 c0 75 0c eb 1d 0f 1f 80 00 00 00 00 48 89 d0 48 8b 50 10 <48> 85 d2 75 f4 5d c3 66 90 48 8b 10 48 89 c7 48 89 d0 48 83 e0 
[  596.667648] NMI backtrace for cpu 1
[  596.667650] CPU: 1 PID: 5684 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  596.667652] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  596.667654] task: ffff88009a570a20 ti: ffff880081a44000 task.ti: ffff880081a44000
[  596.667655] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  596.667660] RSP: 0018:ffff880081a47e08  EFLAGS: 00000046
[  596.667662] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  596.667663] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  596.667665] RBP: ffff880081a47e48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  596.667666] R10: 0000000000000000 R11: 0000000000000242 R12: 000000000000b08a
[  596.667668] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  596.667671] FS:  00007f69a5c71740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  596.667673] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  596.667675] CR2: 00007fff07d89ff8 CR3: 0000000081ab1000 CR4: 00000000001406e0
[  596.667677] Stack:
[  596.667678]  ffffffff00000001 0000000000000001 ffff880081a47e68 0000000000000001
[  596.667682]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  596.667685]  ffff880081a47e58 ffffffff8104efbe ffff880081a47e78 ffffffff8104ab78
[  596.667687] Call Trace:
[  596.667692]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  596.667695]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  596.667700]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  596.667702]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  596.667705]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  596.667709]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  596.667713]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  596.667716]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  596.667720]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  596.667721] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  637.832431] SysRq : Show backtrace of all active CPUs
[  637.835231] sending NMI to all CPUs:
[  637.835266] NMI backtrace for cpu 0
[  637.835269] CPU: 0 PID: 6172 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  637.835271] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  637.835273] task: ffff8801de621e60 ti: ffff880074640000 task.ti: ffff880074640000
[  637.835275] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  637.835283] RSP: 0018:ffff880074643e08  EFLAGS: 00000046
[  637.835284] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000000000000
[  637.835286] RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000300
[  637.835288] RBP: ffff880074643e48 R08: ffffffff81d0c8a8 R09: 0000000000000000
[  637.835290] R10: 0000000000000000 R11: 0000000000000296 R12: 000000000000b08a
[  637.835291] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  637.835297] FS:  00007f4383766740(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  637.835300] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  637.835302] CR2: 00007fff030b7ff8 CR3: 000000007475b000 CR4: 00000000001406f0
[  637.835305] Stack:
[  637.835306]  ffffffff00000000 0000000000000000 ffff880074643e68 0000000000000001
[  637.835310]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  637.835313]  ffff880074643e58 ffffffff8104efbe ffff880074643e78 ffffffff8104ab78
[  637.835316] Call Trace:
[  637.835322]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  637.835325]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  637.835330]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  637.835333]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  637.835336]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  637.835341]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  637.835345]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  637.835349]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  637.835353]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  637.835355] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  637.835406] NMI backtrace for cpu 1
[  637.835409] CPU: 1 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  637.835411] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  637.835416] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  637.835419] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  637.835420] RIP: 0010:[<ffffffffc03ffe60>]  [<ffffffffc03ffe60>] btrfs_bitmap_cluster+0xe0/0x1e0 [btrfs]
[  637.835443] RSP: 0018:ffff8801de5cb4c8  EFLAGS: 00000202
[  637.835445] RAX: 000000000000421b RBX: ffff880183261780 RCX: 0000000000000033
[  637.835447] RDX: 000000000000000e RSI: 0000000000008000 RDI: 0000000000003e00
[  637.835448] RBP: ffff8801de5cb528 R08: ffff88008b2d4840 R09: 0000000000004200
[  637.835450] R10: ffff8801eb4004c0 R11: 0000000000000002 R12: ffff8801dedf2ac0
[  637.835451] R13: ffff880036104e00 R14: 0000000000001c5f R15: 000000000000420d
[  637.835455] FS:  0000000000000000(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  637.835456] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  637.835458] CR2: 00007f4eb642d000 CR3: 0000000036063000 CR4: 00000000001406e0
[  637.835460] Stack:
[  637.835461]  ffff8801de5cb508 ffff8800e94ec600 0000000000a78000 0000000000000460
[  637.835464]  0000000000000c78 0000000000000001 ffff880036104e00 ffff880183261780
[  637.835467]  0000000000c78000 ffff8801de5cb5e8 ffff8800e94ec600 0000006b61c00000
[  637.835470] Call Trace:
[  637.835483]  [<ffffffffc0400f74>] setup_cluster_bitmap+0xe4/0x130 [btrfs]
[  637.835496]  [<ffffffffc0404051>] btrfs_find_space_cluster+0x2c1/0x2f0 [btrfs]
[  637.835507]  [<ffffffffc03a9738>] find_free_extent+0x468/0xc50 [btrfs]
[  637.835517]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  637.835529]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  637.835540]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  637.835552]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  637.835564]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  637.835568]  [<ffffffff811a2900>] ? SyS_msync+0x230/0x230
[  637.835580]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  637.835591]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  637.835602]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  637.835613]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  637.835617]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  637.835620]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  637.835623]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  637.835626]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  637.835629]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  637.835632]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  637.835635]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  637.835638]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  637.835641]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  637.835645]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  637.835649]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  637.835652]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  637.835655]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  637.835658]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  637.835661]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  637.835664]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  637.835667]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  637.835669] Code: f9 c0 48 3d ff 7f 00 00 49 89 c7 76 c6 48 83 c4 38 b8 e4 ff ff ff 5b 41 5c 41 5d 41 5e 41 5f 5d c3 66 2e 0f 1f 84 00 00 00 00 00 <48> 85 d2 74 dd 4d 85 f6 74 36 49 8b 4c 24 10 49 63 75 24 49 01 
[  647.849499] SysRq : Show backtrace of all active CPUs
[  647.853549] sending NMI to all CPUs:
[  647.853581] NMI backtrace for cpu 0
[  647.853585] CPU: 0 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  647.853587] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  647.853592] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  647.853596] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  647.853597] RIP: 0010:[<ffffffff8139aaa0>]  [<ffffffff8139aaa0>] find_next_zero_bit+0x0/0xe0
[  647.853603] RSP: 0018:ffff8801de5cb4c0  EFLAGS: 00000293
[  647.853604] RAX: 000000000000410c RBX: ffff8800c4b04cc0 RCX: 000000000000000c
[  647.853606] RDX: 000000000000410c RSI: 0000000000008000 RDI: ffff8800eac65000
[  647.853607] RBP: ffff8801de5cb528 R08: ffff8800eac65820 R09: 0000000000004100
[  647.853609] R10: 0000000000000413 R11: 0000000000000002 R12: ffff8801dedf2ac0
[  647.853610] R13: ffff8800e9b32880 R14: 0000000000002c1c R15: 000000000000410c
[  647.853616] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  647.853618] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  647.853619] CR2: 00007f4eb642d000 CR3: 00000000eb76b000 CR4: 00000000001406f0
[  647.853622] Stack:
[  647.853625]  ffffffffc03ffe19 ffff8800c4b01c40 ffff8801de94a000 0000000000181000
[  647.853628]  0000000000000000 0000000000000381 0000000000000001 0000000000000018
[  647.853631]  ffff8800c4b04cc0 0000000000381000 ffff8801de5cb5e8 ffff8801de94a000
[  647.853633] Call Trace:
[  647.853657]  [<ffffffffc03ffe19>] ? btrfs_bitmap_cluster+0x99/0x1e0 [btrfs]
[  647.853671]  [<ffffffffc0400f74>] setup_cluster_bitmap+0xe4/0x130 [btrfs]
[  647.853684]  [<ffffffffc0404051>] btrfs_find_space_cluster+0x2c1/0x2f0 [btrfs]
[  647.853695]  [<ffffffffc03a9738>] find_free_extent+0x468/0xc50 [btrfs]
[  647.853705]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  647.853717]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  647.853730]  [<ffffffffc03dbe70>] ? end_extent_writepage+0xa0/0xa0 [btrfs]
[  647.853741]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  647.853753]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  647.853765]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  647.853776]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  647.853788]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  647.853800]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  647.853810]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  647.853821]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  647.853825]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  647.853828]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  647.853831]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  647.853834]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  647.853837]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  647.853840]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  647.853843]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  647.853846]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  647.853849]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  647.853853]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  647.853857]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  647.853861]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  647.853864]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  647.853867]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  647.853870]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  647.853873]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  647.853878]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  647.853881]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  647.853882] Code: 48 85 c0 75 d4 49 83 c0 08 48 83 ef 40 49 83 c1 40 e9 6e ff ff ff 0f 1f 44 00 00 49 8d 04 39 5d c3 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 39 f2 48 89 f0 48 89 e5 0f 83 81 00 00 00 48 89 d1 49 89 
[  647.853912] NMI backtrace for cpu 1
[  647.853915] CPU: 1 PID: 6209 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  647.853916] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  647.853918] task: ffff8801e02b6f60 ti: ffff8800747c0000 task.ti: ffff8800747c0000
[  647.853919] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  647.853925] RSP: 0018:ffff8800747c3e08  EFLAGS: 00000046
[  647.853927] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  647.853929] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  647.853930] RBP: ffff8800747c3e48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  647.853932] R10: 0000000000000000 R11: 00000000000002e8 R12: 000000000000b08a
[  647.853933] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  647.853937] FS:  00007f5a34e3c740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  647.853939] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  647.853941] CR2: 00000000022cb128 CR3: 0000000074642000 CR4: 00000000001406e0
[  647.853944] Stack:
[  647.853945]  ffffffff00000001 0000000000000001 ffff8800747c3e68 0000000000000001
[  647.853948]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  647.853951]  ffff8800747c3e58 ffffffff8104efbe ffff8800747c3e78 ffffffff8104ab78
[  647.853954] Call Trace:
[  647.853959]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  647.853963]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  647.853968]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  647.853970]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  647.853973]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  647.853978]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  647.853982]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  647.853985]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  647.853989]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  647.853990] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  657.868715] SysRq : Show backtrace of all active CPUs
[  657.871375] sending NMI to all CPUs:
[  657.871408] NMI backtrace for cpu 0
[  657.871412] CPU: 0 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  657.871414] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  657.871421] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  657.871424] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  657.871426] RIP: 0010:[<ffffffffc0400d1c>]  [<ffffffffc0400d1c>] setup_cluster_no_bitmap+0xec/0x260 [btrfs]
[  657.871450] RSP: 0018:ffff8801de5cb518  EFLAGS: 00000246
[  657.871451] RAX: ffff8801df775040 RBX: ffff8801de5cb5e8 RCX: 0000000000001000
[  657.871453] RDX: 0000000000000000 RSI: ffff8800361041a4 RDI: ffff8801df775000
[  657.871455] RBP: ffff8801de5cb588 R08: 0000000000000001 R09: 00000000022a6000
[  657.871456] R10: ffff8801eb4004f0 R11: 0000000000000002 R12: 000000000042a000
[  657.871457] R13: ffff8801df773cc0 R14: ffff8801df773cc0 R15: ffff880036104180
[  657.871463] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  657.871464] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  657.871466] CR2: 00007f8fc9cdb5ec CR3: 00000000ea9df000 CR4: 00000000001406f0
[  657.871467] Stack:
[  657.871469]  0000000000001000 ffff8801df773cc0 ffff8801dedf2ac0 ffff8801de948600
[  657.871472]  ffff8801df775000 0000000000060000 00000000022a6000 00000000024a6000
[  657.871475]  ffff8801de5cb588 ffff8801de5cb5e8 00000000024a6000 ffff8801de948600
[  657.871478] Call Trace:
[  657.871494]  [<ffffffffc0403eba>] btrfs_find_space_cluster+0x12a/0x2f0 [btrfs]
[  657.871504]  [<ffffffffc03a9738>] find_free_extent+0x468/0xc50 [btrfs]
[  657.871514]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  657.871527]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  657.871540]  [<ffffffffc03dbe70>] ? end_extent_writepage+0xa0/0xa0 [btrfs]
[  657.871552]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  657.871564]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  657.871576]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  657.871588]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  657.871600]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  657.871611]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  657.871621]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  657.871632]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  657.871636]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  657.871640]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  657.871643]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  657.871646]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  657.871649]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  657.871652]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  657.871655]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  657.871658]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  657.871661]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  657.871664]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  657.871668]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  657.871672]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  657.871675]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  657.871679]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  657.871682]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  657.871685]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  657.871689]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  657.871691]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  657.871693] Code: 89 7d a0 49 89 d5 4d 89 e7 49 89 cc eb 18 90 48 8d 50 30 48 3b 50 30 74 66 48 89 c7 e8 4e df f8 c0 48 85 c0 74 6e 48 83 78 28 00 <75> e2 48 8b 50 20 48 39 55 10 77 e2 49 01 d4 48 3b 55 b8 48 89 
[  657.871723] NMI backtrace for cpu 1
[  657.871725] CPU: 1 PID: 6422 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  657.871727] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  657.871728] task: ffff8801def83cc0 ti: ffff88006fe00000 task.ti: ffff88006fe00000
[  657.871730] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  657.871736] RSP: 0018:ffff88006fe03e08  EFLAGS: 00000046
[  657.871737] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  657.871739] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  657.871741] RBP: ffff88006fe03e48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  657.871743] R10: 0000000000000000 R11: 000000000000033d R12: 000000000000b08a
[  657.871744] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  657.871748] FS:  00007f5eb1ddc740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  657.871750] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  657.871752] CR2: 00007f4eb7aab158 CR3: 000000006fe04000 CR4: 00000000001406e0
[  657.871754] Stack:
[  657.871756]  ffffffff00000001 0000000000000001 ffff88006fe03e68 0000000000000001
[  657.871759]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  657.871762]  ffff88006fe03e58 ffffffff8104efbe ffff88006fe03e78 ffffffff8104ab78
[  657.871765] Call Trace:
[  657.871770]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  657.871773]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  657.871778]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  657.871781]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  657.871784]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  657.871788]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  657.871793]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  657.871796]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  657.871799]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  657.871801] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  667.883733] SysRq : Show backtrace of all active CPUs
[  667.886404] sending NMI to all CPUs:
[  667.886434] NMI backtrace for cpu 0
[  667.886439] CPU: 0 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  667.886441] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  667.886448] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  667.886451] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  667.886452] RIP: 0010:[<ffffffff8139ab29>]  [<ffffffff8139ab29>] find_next_zero_bit+0x89/0xe0
[  667.886458] RSP: 0018:ffff8801de5cb4b8  EFLAGS: 00000207
[  667.886459] RAX: f000700000300c00 RBX: ffff88017e304e40 RCX: 000000000000003f
[  667.886461] RDX: 0000000000000001 RSI: 0000000000008000 RDI: 0000000000007ec0
[  667.886462] RBP: ffff8801de5cb4b8 R08: ffff88017b806028 R09: 0000000000000140
[  667.886464] R10: 0000000000000001 R11: 0000000000000002 R12: ffff8801dedf2ac0
[  667.886465] R13: ffff880036104200 R14: 000000000000012b R15: 0000000000000141
[  667.886470] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  667.886472] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  667.886474] CR2: 00007f4eb642d000 CR3: 00000000ea9df000 CR4: 00000000001406f0
[  667.886477] Stack:
[  667.886478]  ffff8801de5cb528 ffffffffc03ffe19 ffff8801de5cb508 ffff8800eabdfc00
[  667.886481]  0000000000144000 0000000000000000 0000000000000344 0000000000000001
[  667.886484]  ffff880036104200 ffff88017e304e40 0000000000344000 ffff8801de5cb5e8
[  667.886487] Call Trace:
[  667.886510]  [<ffffffffc03ffe19>] btrfs_bitmap_cluster+0x99/0x1e0 [btrfs]
[  667.886524]  [<ffffffffc0400f74>] setup_cluster_bitmap+0xe4/0x130 [btrfs]
[  667.886536]  [<ffffffffc0404051>] btrfs_find_space_cluster+0x2c1/0x2f0 [btrfs]
[  667.886547]  [<ffffffffc03a9738>] find_free_extent+0x468/0xc50 [btrfs]
[  667.886557]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  667.886569]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  667.886581]  [<ffffffffc03dbe70>] ? end_extent_writepage+0xa0/0xa0 [btrfs]
[  667.886593]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  667.886605]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  667.886616]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  667.886628]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  667.886640]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  667.886651]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  667.886661]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  667.886672]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  667.886676]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  667.886679]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  667.886683]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  667.886686]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  667.886689]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  667.886692]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  667.886695]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  667.886698]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  667.886701]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  667.886704]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  667.886708]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  667.886712]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  667.886715]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  667.886719]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  667.886721]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  667.886724]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  667.886729]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  667.886732]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  667.886733] Code: f7 c7 c0 ff ff ff 75 e2 48 85 ff 4c 89 c8 74 23 49 8b 00 48 c7 c2 ff ff ff ff 89 f9 48 d3 e2 48 09 d0 48 83 f8 ff 74 4a 48 f7 d0 <f3> 48 0f bc c0 4c 01 c8 5d c3 0f 1f 44 00 00 b9 40 00 00 00 48 
[  667.886763] NMI backtrace for cpu 1
[  667.886766] CPU: 1 PID: 6467 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  667.886768] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  667.886770] task: ffff8801de518000 ti: ffff88013aca8000 task.ti: ffff88013aca8000
[  667.886771] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  667.886777] RSP: 0018:ffff88013acabe08  EFLAGS: 00000046
[  667.886779] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  667.886780] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  667.886782] RBP: ffff88013acabe48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  667.886783] R10: 0000000000000000 R11: 0000000000000390 R12: 000000000000b08a
[  667.886785] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  667.886788] FS:  00007fc330561740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  667.886790] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  667.886792] CR2: 00007ffff3689fe8 CR3: 000000013acc9000 CR4: 00000000001406e0
[  667.886795] Stack:
[  667.886796]  ffffffff00000001 0000000000000001 ffff88013acabe68 0000000000000001
[  667.886799]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  667.886802]  ffff88013acabe58 ffffffff8104efbe ffff88013acabe78 ffffffff8104ab78
[  667.886806] Call Trace:
[  667.886810]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  667.886814]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  667.886819]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  667.886822]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  667.886825]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  667.886829]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  667.886833]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  667.886837]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  667.886840]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  667.886841] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  677.898868] SysRq : Show backtrace of all active CPUs
[  677.901551] sending NMI to all CPUs:
[  677.901584] NMI backtrace for cpu 0
[  677.901588] CPU: 0 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  677.901590] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  677.901597] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  677.901600] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  677.901602] RIP: 0010:[<ffffffff8139a9d0>]  [<ffffffff8139a9d0>] find_next_bit+0x0/0xd0
[  677.901607] RSP: 0018:ffff8801de5cb4c0  EFLAGS: 00000287
[  677.901608] RAX: 000000000000462c RBX: ffff880183298ac0 RCX: 000000000000462d
[  677.901610] RDX: 000000000000462d RSI: 0000000000008000 RDI: ffff880088df9000
[  677.901612] RBP: ffff8801de5cb528 R08: ffff880088df98c0 R09: 0000000000004600
[  677.901613] R10: ffff8801eb4004f0 R11: 0000000000000002 R12: ffff8801dedf2ac0
[  677.901615] R13: ffff880036104c40 R14: 00000000000031ce R15: 0000000000004629
[  677.901620] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  677.901622] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  677.901623] CR2: 00007f4eb642d000 CR3: 00000000ea9df000 CR4: 00000000001406f0
[  677.901627] Stack:
[  677.901628]  ffffffffc03ffe37 ffff8801de5cb508 ffff8800e94ed200 00000000001a5000
[  677.901631]  0000000000000000 00000000000003a5 0000000000000001 ffff880036104c40
[  677.901634]  ffff880183298ac0 00000000003a5000 ffff8801de5cb5e8 ffff8800e94ed200
[  677.901637] Call Trace:
[  677.901661]  [<ffffffffc03ffe37>] ? btrfs_bitmap_cluster+0xb7/0x1e0 [btrfs]
[  677.901675]  [<ffffffffc0400f74>] setup_cluster_bitmap+0xe4/0x130 [btrfs]
[  677.901688]  [<ffffffffc0404051>] btrfs_find_space_cluster+0x2c1/0x2f0 [btrfs]
[  677.901698]  [<ffffffffc03a9738>] find_free_extent+0x468/0xc50 [btrfs]
[  677.901708]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  677.901720]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  677.901731]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  677.901744]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  677.901755]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  677.901759]  [<ffffffff811a2900>] ? SyS_msync+0x230/0x230
[  677.901771]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  677.901783]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  677.901795]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  677.901805]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  677.901816]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  677.901819]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  677.901823]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  677.901826]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  677.901829]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  677.901832]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  677.901835]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  677.901838]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  677.901841]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  677.901844]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  677.901847]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  677.901851]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  677.901854]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  677.901858]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  677.901861]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  677.901864]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  677.901867]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  677.901871]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  677.901873]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  677.901875] Code: 23 34 d7 75 18 66 0f 1f 44 00 00 48 85 d2 74 19 48 83 ea 01 48 8b 34 d7 48 85 f6 74 ee 48 c1 e2 06 48 0f bd f6 48 8d 04 32 5d c3 <55> 48 39 f2 48 89 f0 48 89 e5 73 7a 48 89 d1 49 89 d1 48 c1 e9 
[  677.901905] NMI backtrace for cpu 1
[  677.901908] CPU: 1 PID: 6472 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  677.901909] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  677.901911] task: ffff8801def846e0 ti: ffff88004d26c000 task.ti: ffff88004d26c000
[  677.901913] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  677.901919] RSP: 0018:ffff88004d26fe08  EFLAGS: 00000046
[  677.901921] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  677.901922] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  677.901924] RBP: ffff88004d26fe48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  677.901925] R10: 0000000000000000 R11: 00000000000003e5 R12: 000000000000b08a
[  677.901927] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  677.901931] FS:  00007f5a5fadc740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  677.901933] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  677.901934] CR2: 00007fff666bbfb8 CR3: 000000004d289000 CR4: 00000000001406e0
[  677.901937] Stack:
[  677.901938]  ffffffff00000001 0000000000000001 ffff88004d26fe68 0000000000000001
[  677.901941]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  677.901944]  ffff88004d26fe58 ffffffff8104efbe ffff88004d26fe78 ffffffff8104ab78
[  677.901948] Call Trace:
[  677.901953]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  677.901956]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  677.901961]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  677.901964]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  677.901967]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  677.901971]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  677.901976]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  677.901979]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  677.901982]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  677.901984] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  687.913806] SysRq : Show backtrace of all active CPUs
[  687.916841] sending NMI to all CPUs:
[  687.916872] NMI backtrace for cpu 0
[  687.916876] CPU: 0 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  687.916878] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  687.916885] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  687.916888] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  687.916890] RIP: 0010:[<ffffffff8139ab4c>]  [<ffffffff8139ab4c>] find_next_zero_bit+0xac/0xe0
[  687.916895] RSP: 0018:ffff8801de5cb4b8  EFLAGS: 00000206
[  687.916897] RAX: 07ffffffffffffff RBX: ffff88017e16ad80 RCX: 0000000000000006
[  687.916898] RDX: 000000000000003a RSI: 0000000000008000 RDI: 0000000000007600
[  687.916900] RBP: ffff8801de5cb4b8 R08: ffff88017ce24140 R09: 0000000000000a00
[  687.916901] R10: ffff8801eb4004f0 R11: 0000000000000002 R12: ffff8801dedf2ac0
[  687.916903] R13: ffff880036104600 R14: 000000000000007d R15: 0000000000000a3a
[  687.916908] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  687.916910] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  687.916911] CR2: 00007f4eb642d000 CR3: 00000000ea9df000 CR4: 00000000001406f0
[  687.916913] Stack:
[  687.916914]  ffff8801de5cb528 ffffffffc03ffe19 ffff8801de5cb508 ffff8800eabdde00
[  687.916917]  000000000024b000 0000000000000000 000000000000044b 0000000000000001
[  687.916920]  ffff880036104600 ffff88017e16ad80 000000000044b000 ffff8801de5cb5e8
[  687.916923] Call Trace:
[  687.916947]  [<ffffffffc03ffe19>] btrfs_bitmap_cluster+0x99/0x1e0 [btrfs]
[  687.916960]  [<ffffffffc0400f74>] setup_cluster_bitmap+0xe4/0x130 [btrfs]
[  687.916974]  [<ffffffffc0404051>] btrfs_find_space_cluster+0x2c1/0x2f0 [btrfs]
[  687.916984]  [<ffffffffc03a9738>] find_free_extent+0x468/0xc50 [btrfs]
[  687.916994]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  687.917006]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  687.917017]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  687.917030]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  687.917042]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  687.917047]  [<ffffffff811a2900>] ? SyS_msync+0x230/0x230
[  687.917058]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  687.917070]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  687.917082]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  687.917092]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  687.917102]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  687.917106]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  687.917110]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  687.917113]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  687.917116]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  687.917119]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  687.917122]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  687.917125]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  687.917128]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  687.917131]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  687.917134]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  687.917138]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  687.917142]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  687.917145]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  687.917148]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  687.917151]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  687.917154]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  687.917158]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  687.917161]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  687.917162] Code: 83 f8 ff 74 4a 48 f7 d0 f3 48 0f bc c0 4c 01 c8 5d c3 0f 1f 44 00 00 b9 40 00 00 00 48 c7 c0 ff ff ff ff 29 d1 48 d3 e8 49 0b 00 <48> 83 ff 3f 76 bf 48 83 f8 ff 75 ce 49 83 c0 08 48 83 ef 40 49 
[  687.917192] NMI backtrace for cpu 1
[  687.917195] CPU: 1 PID: 6478 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  687.917196] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  687.917198] task: ffff8801def83cc0 ti: ffff88013ad08000 task.ti: ffff88013ad08000
[  687.917200] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  687.917206] RSP: 0018:ffff88013ad0be08  EFLAGS: 00000046
[  687.917207] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  687.917209] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  687.917211] RBP: ffff88013ad0be48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  687.917212] R10: 0000000000000000 R11: 000000000000043a R12: 000000000000b08a
[  687.917214] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  687.917218] FS:  00007f1d8348e740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  687.917219] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  687.917221] CR2: 0000000001c18128 CR3: 000000013ad0f000 CR4: 00000000001406e0
[  687.917224] Stack:
[  687.917225]  ffffffff00000001 0000000000000001 ffff88013ad0be68 0000000000000001
[  687.917228]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  687.917231]  ffff88013ad0be58 ffffffff8104efbe ffff88013ad0be78 ffffffff8104ab78
[  687.917235] Call Trace:
[  687.917239]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  687.917243]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  687.917248]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  687.917251]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  687.917253]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  687.917258]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  687.917262]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  687.917265]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  687.917268]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  687.917270] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  697.929667] SysRq : Show backtrace of all active CPUs
[  697.932363] sending NMI to all CPUs:
[  697.932398] NMI backtrace for cpu 0
[  697.932402] CPU: 0 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  697.932404] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  697.932411] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  697.932414] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  697.932415] RIP: 0010:[<ffffffff8139aaa0>]  [<ffffffff8139aaa0>] find_next_zero_bit+0x0/0xe0
[  697.932421] RSP: 0018:ffff8801de5cb4c0  EFLAGS: 00000297
[  697.932423] RAX: 0000000000003c7c RBX: ffff8800c4b04d80 RCX: 000000000000003b
[  697.932425] RDX: 0000000000003c7c RSI: 0000000000008000 RDI: ffff8800eac62000
[  697.932426] RBP: ffff8801de5cb528 R08: ffff8800eac62788 R09: 0000000000003c40
[  697.932428] R10: ffff8801eb4004f0 R11: 0000000000000002 R12: ffff8801dedf2ac0
[  697.932429] R13: ffff8800e9b32880 R14: 000000000000330a R15: 0000000000003c7c
[  697.932435] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  697.932436] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  697.932438] CR2: 00007f4eb642d000 CR3: 00000000ea9df000 CR4: 00000000001406f0
[  697.932441] Stack:
[  697.932442]  ffffffffc03ffe19 ffff8801de5cb508 ffff8801de94a000 0000000000df4000
[  697.932445]  0000000000000000 0000000000000ff4 0000000000000001 ffff8800e9b32880
[  697.932448]  ffff8800c4b04d80 0000000000ff4000 ffff8801de5cb5e8 ffff8801de94a000
[  697.932451] Call Trace:
[  697.932475]  [<ffffffffc03ffe19>] ? btrfs_bitmap_cluster+0x99/0x1e0 [btrfs]
[  697.932489]  [<ffffffffc0400f74>] setup_cluster_bitmap+0xe4/0x130 [btrfs]
[  697.932501]  [<ffffffffc0404051>] btrfs_find_space_cluster+0x2c1/0x2f0 [btrfs]
[  697.932512]  [<ffffffffc03a9738>] find_free_extent+0x468/0xc50 [btrfs]
[  697.932522]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  697.932534]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  697.932545]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  697.932558]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  697.932570]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  697.932574]  [<ffffffff811a2900>] ? SyS_msync+0x230/0x230
[  697.932586]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  697.932598]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  697.932609]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  697.932620]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  697.932630]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  697.932634]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  697.932637]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  697.932640]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  697.932643]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  697.932646]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  697.932649]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  697.932652]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  697.932655]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  697.932658]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  697.932662]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  697.932666]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  697.932669]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  697.932673]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  697.932676]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  697.932679]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  697.932682]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  697.932686]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  697.932688]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  697.932690] Code: 48 85 c0 75 d4 49 83 c0 08 48 83 ef 40 49 83 c1 40 e9 6e ff ff ff 0f 1f 44 00 00 49 8d 04 39 5d c3 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 39 f2 48 89 f0 48 89 e5 0f 83 81 00 00 00 48 89 d1 49 89 
[  697.932720] NMI backtrace for cpu 1
[  697.932723] CPU: 1 PID: 6483 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  697.932724] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  697.932726] task: ffff8801def86540 ti: ffff880041e8c000 task.ti: ffff880041e8c000
[  697.932728] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  697.932733] RSP: 0018:ffff880041e8fe08  EFLAGS: 00000046
[  697.932735] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  697.932736] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  697.932738] RBP: ffff880041e8fe48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  697.932740] R10: 0000000000000000 R11: 000000000000048f R12: 000000000000b08a
[  697.932741] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  697.932745] FS:  00007f014beff740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  697.932747] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  697.932749] CR2: 00007f4eb7bc8000 CR3: 0000000041e97000 CR4: 00000000001406e0
[  697.932751] Stack:
[  697.932753]  ffffffff00000001 0000000000000001 ffff880041e8fe68 0000000000000001
[  697.932756]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  697.932759]  ffff880041e8fe58 ffffffff8104efbe ffff880041e8fe78 ffffffff8104ab78
[  697.932762] Call Trace:
[  697.932767]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  697.932770]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  697.932775]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  697.932778]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  697.932781]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  697.932785]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  697.932789]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  697.932793]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  697.932796]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  697.932797] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  707.944858] SysRq : Show backtrace of all active CPUs
[  707.947927] sending NMI to all CPUs:
[  707.947959] NMI backtrace for cpu 0
[  707.947964] CPU: 0 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  707.947966] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  707.947973] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  707.947976] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  707.947977] RIP: 0010:[<ffffffff8139a9d1>]  [<ffffffff8139a9d1>] find_next_bit+0x1/0xd0
[  707.947983] RSP: 0018:ffff8801de5cb4b8  EFLAGS: 00000287
[  707.947984] RAX: 0000000000001fbc RBX: ffff8801928639c0 RCX: 0000000000001fbd
[  707.947986] RDX: 0000000000001fbd RSI: 0000000000008000 RDI: ffff8801e000b000
[  707.947988] RBP: ffff8801de5cb528 R08: ffff8801e000b3f0 R09: 0000000000001f80
[  707.947989] R10: ffff8801eb4004f0 R11: 0000000000000002 R12: ffff8801dedf2ac0
[  707.947991] R13: ffff8800367fa780 R14: 0000000000001622 R15: 0000000000001fba
[  707.947996] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  707.947998] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  707.948000] CR2: 00007f4eb642d000 CR3: 00000000ea9df000 CR4: 00000000001406f0
[  707.948001] Stack:
[  707.948003]  ffff8801de5cb528 ffffffffc03ffe37 ffff8801de5cb508 ffff880036502a00
[  707.948006]  0000000000b7f000 0000000000000002 0000000000000d7f 0000000000000001
[  707.948008]  ffff8800367fa780 ffff8801928639c0 0000000000d7f000 ffff8801de5cb5e8
[  707.948011] Call Trace:
[  707.948035]  [<ffffffffc03ffe37>] ? btrfs_bitmap_cluster+0xb7/0x1e0 [btrfs]
[  707.948049]  [<ffffffffc0400f74>] setup_cluster_bitmap+0xe4/0x130 [btrfs]
[  707.948057]  [<ffffffffc0404051>] btrfs_find_space_cluster+0x2c1/0x2f0 [btrfs]
[  707.948057]  [<ffffffffc03a9738>] find_free_extent+0x468/0xc50 [btrfs]
[  707.948057]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  707.948057]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  707.948057]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  707.948057]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  707.948057]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  707.948057]  [<ffffffff811a2900>] ? SyS_msync+0x230/0x230
[  707.948057]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  707.948057]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  707.948057]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  707.948057]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  707.948057]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  707.948057]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  707.948057]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  707.948057]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  707.948057]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  707.948057]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  707.948057]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  707.948057]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  707.948057]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  707.948057]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  707.948057]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  707.948057]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  707.948057]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  707.948057]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  707.948057]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  707.948057]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  707.948057]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  707.948057]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  707.948057]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  707.948057] Code: 34 d7 75 18 66 0f 1f 44 00 00 48 85 d2 74 19 48 83 ea 01 48 8b 34 d7 48 85 f6 74 ee 48 c1 e2 06 48 0f bd f6 48 8d 04 32 5d c3 55 <48> 39 f2 48 89 f0 48 89 e5 73 7a 48 89 d1 49 89 d1 48 c1 e9 06 
[  707.948057] NMI backtrace for cpu 1
[  707.948057] CPU: 1 PID: 6501 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  707.948057] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  707.948057] task: ffff8801e02b5100 ti: ffff880041f3c000 task.ti: ffff880041f3c000
[  707.948057] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  707.948057] RSP: 0018:ffff880041f3fe08  EFLAGS: 00000046
[  707.948057] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  707.948057] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  707.948057] RBP: ffff880041f3fe48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  707.948057] R10: 0000000000000000 R11: 00000000000004e4 R12: 000000000000b08a
[  707.948057] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  707.948057] FS:  00007fcfcb5f7740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  707.948057] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  707.948057] CR2: 00007f4eb7bd8000 CR3: 000000006fe6e000 CR4: 00000000001406e0
[  707.948057] Stack:
[  707.948057]  ffffffff00000001 0000000000000001 ffff880041f3fe68 0000000000000001
[  707.948057]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  707.948057]  ffff880041f3fe58 ffffffff8104efbe ffff880041f3fe78 ffffffff8104ab78
[  707.948057] Call Trace:
[  707.948057]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  707.948057]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  707.948057]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  707.948057]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  707.948057]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  707.948057]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  707.948057]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  707.948057]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  707.948057]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  707.948057] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  717.960553] SysRq : Show backtrace of all active CPUs
[  717.963223] sending NMI to all CPUs:
[  717.963258] NMI backtrace for cpu 0
[  717.963262] CPU: 0 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  717.963264] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  717.963271] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  717.963274] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  717.963276] RIP: 0010:[<ffffffff8139ab31>]  [<ffffffff8139ab31>] find_next_zero_bit+0x91/0xe0
[  717.963281] RSP: 0018:ffff8801de5cb4f8  EFLAGS: 00000202
[  717.963283] RAX: 000000000000279d RBX: ffff8800ea7a1268 RCX: 0000000000000025
[  717.963284] RDX: 000000000000001b RSI: 0000000000008000 RDI: 0000000000005880
[  717.963286] RBP: ffff8801de5cb4f8 R08: ffff8801eb8184f0 R09: 0000000000002780
[  717.963287] R10: ffff8801eb4004f0 R11: 0000000000000002 R12: ffff8800367fa964
[  717.963289] R13: 000000000000279b R14: 00000000000000a0 R15: 000000000000013a
[  717.963294] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  717.963296] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  717.963298] CR2: 00007f4eb642d000 CR3: 00000000ea9df000 CR4: 00000000001406f0
[  717.963299] Stack:
[  717.963301]  ffff8801de5cb558 ffffffffc0400813 ffff8801de5cb588 ffff8800ea7a1258
[  717.963304]  ffff8801de5cb590 ffff8801de5cb588 ffff8801dedf2ac0 ffff8800ea7a1240
[  717.963307]  ffff8801de5cb6d0 ffff8800367fa940 ffff8801de5cb5f0 0000000000001000
[  717.963310] Call Trace:
[  717.963334]  [<ffffffffc0400813>] search_bitmap.isra.24+0xb3/0x120 [btrfs]
[  717.963347]  [<ffffffffc04010dc>] find_free_space+0x11c/0x1a0 [btrfs]
[  717.963360]  [<ffffffffc0403990>] btrfs_find_space_for_alloc+0x60/0x180 [btrfs]
[  717.963370]  [<ffffffffc03a9658>] find_free_extent+0x388/0xc50 [btrfs]
[  717.963380]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  717.963392]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  717.963403]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  717.963415]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  717.963427]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  717.963431]  [<ffffffff811a2900>] ? SyS_msync+0x230/0x230
[  717.963443]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  717.963455]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  717.963466]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  717.963477]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  717.963487]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  717.963491]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  717.963494]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  717.963497]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  717.963500]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  717.963503]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  717.963506]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  717.963509]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  717.963512]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  717.963515]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  717.963518]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  717.963522]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  717.963526]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  717.963529]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  717.963533]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  717.963535]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  717.963538]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  717.963542]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  717.963545]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  717.963547] Code: 48 85 ff 4c 89 c8 74 23 49 8b 00 48 c7 c2 ff ff ff ff 89 f9 48 d3 e2 48 09 d0 48 83 f8 ff 74 4a 48 f7 d0 f3 48 0f bc c0 4c 01 c8 <5d> c3 0f 1f 44 00 00 b9 40 00 00 00 48 c7 c0 ff ff ff ff 29 d1 
[  717.963577] NMI backtrace for cpu 1
[  717.963580] CPU: 1 PID: 6507 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  717.963581] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  717.963583] task: ffff8801e02b3cc0 ti: ffff880041eec000 task.ti: ffff880041eec000
[  717.963585] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  717.963590] RSP: 0018:ffff880041eefe08  EFLAGS: 00000046
[  717.963592] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  717.963593] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  717.963595] RBP: ffff880041eefe48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  717.963597] R10: 0000000000000000 R11: 0000000000000539 R12: 000000000000b08a
[  717.963598] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  717.963602] FS:  00007f77c87eb740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  717.963604] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  717.963606] CR2: 00000000023f0128 CR3: 0000000041ecd000 CR4: 00000000001406e0
[  717.963609] Stack:
[  717.963610]  ffffffff00000001 0000000000000001 ffff880041eefe68 0000000000000001
[  717.963613]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  717.963616]  ffff880041eefe58 ffffffff8104efbe ffff880041eefe78 ffffffff8104ab78
[  717.963619] Call Trace:
[  717.963624]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  717.963627]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  717.963632]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  717.963635]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  717.963638]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  717.963643]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  717.963647]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  717.963650]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  717.963654]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  717.963655] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  727.978550] SysRq : Show backtrace of all active CPUs
[  727.981714] sending NMI to all CPUs:
[  727.981743] NMI backtrace for cpu 0
[  727.981747] CPU: 0 PID: 6577 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  727.981748] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  727.981751] task: ffff8800e9b7c6e0 ti: ffff8800433b4000 task.ti: ffff8800433b4000
[  727.981753] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  727.981760] RSP: 0018:ffff8800433b7e08  EFLAGS: 00000046
[  727.981762] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000000000000
[  727.981764] RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000300
[  727.981765] RBP: ffff8800433b7e48 R08: ffffffff81d0c8a8 R09: 0000000000000000
[  727.981767] R10: 0000000000000000 R11: 000000000000058e R12: 000000000000b08a
[  727.981769] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  727.981775] FS:  00007f599a989740(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  727.981777] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  727.981779] CR2: 0000000001dc3128 CR3: 00000000432c4000 CR4: 00000000001406f0
[  727.981782] Stack:
[  727.981783]  ffffffff00000000 0000000000000000 ffff8800433b7e68 0000000000000001
[  727.981787]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  727.981790]  ffff8800433b7e58 ffffffff8104efbe ffff8800433b7e78 ffffffff8104ab78
[  727.981793] Call Trace:
[  727.981799]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  727.981803]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  727.981808]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  727.981811]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  727.981814]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  727.981818]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  727.981823]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  727.981826]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  727.981831]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  727.981833] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  727.981909] NMI backtrace for cpu 1
[  727.981912] CPU: 1 PID: 938 Comm: in:imklog Not tainted 3.16.0-031600rc7-generic #201407271635
[  727.981914] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  727.981916] task: ffff8801e0360000 ti: ffff8800ead84000 task.ti: ffff8800ead84000
[  727.981917] RIP: 0033:[<000000000042ac62>]  [<000000000042ac62>] 0x42ac62
[  727.981925] RSP: 002b:00007f1a595e1490  EFLAGS: 00000246
[  727.981927] RAX: 00000000ffffffff RBX: 00007f1a540022b0 RCX: 0000000000000000
[  727.981929] RDX: 00000000ffffffff RSI: 0000000000000000 RDI: 00007f1a540022c8
[  727.981930] RBP: 00007f1a595e14c8 R08: 0000000000000004 R09: 0000000000000025
[  727.981932] R10: ffffffffffffc139 R11: a3d70a3d70a3d701 R12: 00007f1a540023b0
[  727.981933] R13: 0000000000000004 R14: 00007f1a595e20e6 R15: 00007f1a595e2137
[  727.981937] FS:  00007f1a59602700(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  727.981938] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  727.981940] CR2: 00007f4eb642d000 CR3: 0000000036063000 CR4: 00000000001406e0
[  727.981943] 
[  737.994413] SysRq : Show backtrace of all active CPUs
[  737.997396] sending NMI to all CPUs:
[  737.997430] NMI backtrace for cpu 0
[  737.997435] CPU: 0 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  737.997437] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  737.997443] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  737.997446] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  737.997448] RIP: 0010:[<ffffffff8139a9dc>]  [<ffffffff8139a9dc>] find_next_bit+0xc/0xd0
[  737.997454] RSP: 0018:ffff8801de5cb4f8  EFLAGS: 00000287
[  737.997455] RAX: 0000000000008000 RBX: ffff8800c4b09aa8 RCX: 0000000000000001
[  737.997457] RDX: 000000000000422d RSI: 0000000000008000 RDI: ffff8800eacfb000
[  737.997458] RBP: ffff8801de5cb4f8 R08: ffff8800eacfb840 R09: 0000000000004200
[  737.997460] R10: 0000000000000000 R11: 0000000000000002 R12: ffff8800e9b329e4
[  737.997461] R13: 000000000000422b R14: 00000000000000b0 R15: 000000000000015a
[  737.997467] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  737.997469] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  737.997470] CR2: 00007f4eb642d000 CR3: 0000000036063000 CR4: 00000000001406f0
[  737.997473] Stack:
[  737.997475]  ffff8801de5cb558 ffffffffc04007f8 ffff8801de51ef60 ffff8800c4b09a98
[  737.997478]  ffff8801de5cb590 ffff8801de5cb588 ffff8801e1773cc0 ffff8800c4b09a80
[  737.997481]  ffff8801de5cb6d0 ffff8800e9b329c0 ffff8801de5cb5f0 0000000000001000
[  737.997484] Call Trace:
[  737.997509]  [<ffffffffc04007f8>] search_bitmap.isra.24+0x98/0x120 [btrfs]
[  737.997523]  [<ffffffffc04010dc>] find_free_space+0x11c/0x1a0 [btrfs]
[  737.997536]  [<ffffffffc0403990>] btrfs_find_space_for_alloc+0x60/0x180 [btrfs]
[  737.997546]  [<ffffffffc03a9658>] find_free_extent+0x388/0xc50 [btrfs]
[  737.997556]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  737.997568]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  737.997580]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  737.997592]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  737.997605]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  737.997609]  [<ffffffff811a2900>] ? SyS_msync+0x230/0x230
[  737.997620]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  737.997633]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  737.997644]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  737.997654]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  737.997665]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  737.997669]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  737.997672]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  737.997675]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  737.997678]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  737.997681]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  737.997684]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  737.997687]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  737.997690]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  737.997693]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  737.997696]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  737.997701]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  737.997705]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  737.997708]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  737.997712]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  737.997715]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  737.997718]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  737.997722]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  737.997725]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  737.997726] Code: 85 d2 74 19 48 83 ea 01 48 8b 34 d7 48 85 f6 74 ee 48 c1 e2 06 48 0f bd f6 48 8d 04 32 5d c3 55 48 39 f2 48 89 f0 48 89 e5 73 7a <48> 89 d1 49 89 d1 48 c1 e9 06 49 83 e1 c0 4c 8d 04 cf 48 89 f7 
[  737.997756] NMI backtrace for cpu 1
[  737.997760] CPU: 1 PID: 6631 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  737.997761] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  737.997763] task: ffff8801e02b3cc0 ti: ffff8800433b4000 task.ti: ffff8800433b4000
[  737.997765] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  737.997770] RSP: 0018:ffff8800433b7e08  EFLAGS: 00000046
[  737.997772] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  737.997774] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  737.997776] RBP: ffff8800433b7e48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  737.997777] R10: 0000000000000000 R11: 00000000000005bc R12: 000000000000b08a
[  737.997779] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  737.997783] FS:  00007fbc8ad7c740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  737.997785] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  737.997787] CR2: 0000000001b65128 CR3: 00000000432f3000 CR4: 00000000001406e0
[  737.997789] Stack:
[  737.997791]  ffffffff00000001 0000000000000001 ffff8800433b7e68 0000000000000001
[  737.997794]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  737.997797]  ffff8800433b7e58 ffffffff8104efbe ffff8800433b7e78 ffffffff8104ab78
[  737.997800] Call Trace:
[  737.997805]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  737.997808]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  737.997813]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  737.997816]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  737.997819]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  737.997824]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  737.997828]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  737.997831]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  737.997835]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  737.997836] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  748.009971] SysRq : Show backtrace of all active CPUs
[  748.012601] sending NMI to all CPUs:
[  748.012634] NMI backtrace for cpu 0
[  748.012638] CPU: 0 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  748.012640] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  748.012646] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  748.012649] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  748.012651] RIP: 0010:[<ffffffff8139a9ea>]  [<ffffffff8139a9ea>] find_next_bit+0x1a/0xd0
[  748.012656] RSP: 0018:ffff8801de5cb4f8  EFLAGS: 00000206
[  748.012658] RAX: 0000000000008000 RBX: ffff8800c4ad34e8 RCX: 000000000000013f
[  748.012659] RDX: 0000000000004fc4 RSI: 0000000000008000 RDI: ffff8800ea1d3000
[  748.012661] RBP: ffff8801de5cb4f8 R08: ffff8800ea1d3a00 R09: 0000000000004fc0
[  748.012662] R10: 0000000000000406 R11: 0000000000000002 R12: ffff880036104824
[  748.012664] R13: 0000000000004fc0 R14: 00000000000000eb R15: 00000000000015a2
[  748.012669] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  748.012671] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  748.012673] CR2: 00007f4eb642d000 CR3: 00000000ea9df000 CR4: 00000000001406f0
[  748.012674] Stack:
[  748.012675]  ffff8801de5cb558 ffffffffc04007f8 ffff8801de51ef60 ffff8800c4ad34d8
[  748.012678]  ffff8801de5cb590 ffff8801de5cb588 ffff8801e1773cc0 ffff8800c4ad34c0
[  748.012681]  ffff8801de5cb6d0 ffff880036104800 ffff8801de5cb5f0 0000000000001000
[  748.012684] Call Trace:
[  748.012708]  [<ffffffffc04007f8>] search_bitmap.isra.24+0x98/0x120 [btrfs]
[  748.012722]  [<ffffffffc04010dc>] find_free_space+0x11c/0x1a0 [btrfs]
[  748.012735]  [<ffffffffc0403990>] btrfs_find_space_for_alloc+0x60/0x180 [btrfs]
[  748.012745]  [<ffffffffc03a9658>] find_free_extent+0x388/0xc50 [btrfs]
[  748.012755]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  748.012767]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  748.012778]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  748.012791]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  748.012803]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  748.012807]  [<ffffffff811a2900>] ? SyS_msync+0x230/0x230
[  748.012819]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  748.012831]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  748.012842]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  748.012852]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  748.012863]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  748.012866]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  748.012870]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  748.012873]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  748.012876]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  748.012879]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  748.012882]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  748.012885]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  748.012888]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  748.012891]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  748.012894]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  748.012899]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  748.012903]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  748.012906]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  748.012909]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  748.012912]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  748.012915]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  748.012920]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  748.012923]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  748.012924] Code: f6 74 ee 48 c1 e2 06 48 0f bd f6 48 8d 04 32 5d c3 55 48 39 f2 48 89 f0 48 89 e5 73 7a 48 89 d1 49 89 d1 48 c1 e9 06 49 83 e1 c0 <4c> 8d 04 cf 48 89 f7 4c 29 cf 83 e2 3f 75 67 48 f7 c7 c0 ff ff 
[  748.012954] NMI backtrace for cpu 1
[  748.012957] CPU: 1 PID: 6636 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  748.012959] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  748.012960] task: ffff8801e02b3cc0 ti: ffff88004336c000 task.ti: ffff88004336c000
[  748.012962] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  748.012968] RSP: 0018:ffff88004336fe08  EFLAGS: 00000046
[  748.012970] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  748.012971] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  748.012973] RBP: ffff88004336fe48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  748.012975] R10: 0000000000000000 R11: 0000000000000611 R12: 000000000000b08a
[  748.012976] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  748.012980] FS:  00007f4fd8c08740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  748.012982] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  748.012983] CR2: 0000000000ba6128 CR3: 000000004330c000 CR4: 00000000001406e0
[  748.012986] Stack:
[  748.012988]  ffffffff00000001 0000000000000001 ffff88004336fe68 0000000000000001
[  748.012991]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  748.012994]  ffff88004336fe58 ffffffff8104efbe ffff88004336fe78 ffffffff8104ab78
[  748.012997] Call Trace:
[  748.013001]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  748.013005]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  748.013010]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  748.013013]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  748.013016]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  748.013020]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  748.013025]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  748.013028]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  748.013031]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  748.013033] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  758.023642] SysRq : Show backtrace of all active CPUs
[  758.026130] sending NMI to all CPUs:
[  758.026165] NMI backtrace for cpu 0
[  758.026170] CPU: 0 PID: 6 Comm: kworker/u30:0 Not tainted 3.16.0-031600rc7-generic #201407271635
[  758.026172] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  758.026193] Workqueue: btrfs-endio normal_work_helper [btrfs]
[  758.026196] task: ffff8801e17732a0 ti: ffff8801e17b4000 task.ti: ffff8801e17b4000
[  758.026198] RIP: 0010:[<ffffffff81067624>]  [<ffffffff81067624>] crc_20+0x14/0x1e
[  758.026203] RSP: 0018:ffff8801e17b7b68  EFLAGS: 00000246
[  758.026205] RAX: 000000000000002a RBX: 0000000000000400 RCX: ffff880042ccdd50
[  758.026206] RDX: ffff880042ccdea0 RSI: 0000000000000a14 RDI: ffffffff8106737c
[  758.026208] RBP: ffff8801e17b7ba8 R08: 0000000096b31f4c R09: 0000000062c004f7
[  758.026209] R10: 00000000d047ac00 R11: ffff880042ccdff0 R12: ffff8801e17b7bd0
[  758.026211] R13: ffff880042ccd000 R14: 0000000000001000 R15: ffff880043690000
[  758.026216] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  758.026218] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  758.026220] CR2: 00007f0d40f41889 CR3: 0000000036063000 CR4: 00000000001406f0
[  758.026222] Stack:
[  758.026224]  0000000000001000 ffff880042ccd000 0000000000001000 ffffffff81066786
[  758.026227]  ffff880036656500 ffff8801e17b7bd0 ffff880042ccd000 ffffea00010b3340
[  758.026230]  ffff8801e17b7bb8 ffffffff81346868 ffff8801e17b7c18 ffffffffc04314cb
[  758.026232] Call Trace:
[  758.026239]  [<ffffffff81066786>] ? crc32c_pcl_intel_update+0x76/0xb0
[  758.026243]  [<ffffffff81346868>] crypto_shash_update+0x18/0x30
[  758.026259]  [<ffffffffc04314cb>] btrfs_crc32c+0x5b/0x80 [btrfs]
[  758.026271]  [<ffffffffc03b7136>] btrfs_csum_data+0x16/0x20 [btrfs]
[  758.026282]  [<ffffffffc03bf647>] btrfs_readpage_end_io_hook+0xe7/0x230 [btrfs]
[  758.026286]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  758.026299]  [<ffffffffc03dd2bf>] end_bio_extent_readpage+0x13f/0x3d0 [btrfs]
[  758.026303]  [<ffffffff81351333>] bio_endio+0x53/0xa0
[  758.026305]  [<ffffffff81351392>] bio_endio_nodec+0x12/0x20
[  758.026316]  [<ffffffffc03b52d1>] end_workqueue_fn+0x41/0x50 [btrfs]
[  758.026329]  [<ffffffffc03ed509>] normal_work_helper+0x79/0x1b0 [btrfs]
[  758.026332]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  758.026336]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  758.026339]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  758.026343]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  758.026346]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  758.026350]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  758.026352]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  758.026354] Code: ff ff ff f2 4c 0f 38 f1 8a 58 ff ff ff f2 4d 0f 38 f1 93 58 ff ff ff f2 4c 0f 38 f1 81 60 ff ff ff f2 4c 0f 38 f1 8a 60 ff ff ff <f2> 4d 0f 38 f1 93 60 ff ff ff f2 4c 0f 38 f1 81 68 ff ff ff f2 
[  758.026384] NMI backtrace for cpu 1
[  758.026387] CPU: 1 PID: 6641 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  758.026388] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  758.026390] task: ffff8801e02b3cc0 ti: ffff8801305c8000 task.ti: ffff8801305c8000
[  758.026392] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  758.026398] RSP: 0018:ffff8801305cbe08  EFLAGS: 00000046
[  758.026399] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  758.026401] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  758.026402] RBP: ffff8801305cbe48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  758.026404] R10: 0000000000000000 R11: 0000000000000666 R12: 000000000000b08a
[  758.026406] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  758.026410] FS:  00007f3987c63740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  758.026412] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  758.026413] CR2: 0000000002376128 CR3: 00000001305d5000 CR4: 00000000001406e0
[  758.026416] Stack:
[  758.026417]  ffffffff00000001 0000000000000001 ffff8801305cbe68 0000000000000001
[  758.026420]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  758.026423]  ffff8801305cbe58 ffffffff8104efbe ffff8801305cbe78 ffffffff8104ab78
[  758.026426] Call Trace:
[  758.026431]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  758.026435]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  758.026438]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  758.026440]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  758.026442]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  758.026446]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  758.026449]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  758.026452]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  758.026454]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  758.026455] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  768.037347] SysRq : Show backtrace of all active CPUs
[  768.042523] sending NMI to all CPUs:
[  768.042555] NMI backtrace for cpu 0
[  768.042560] CPU: 0 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  768.042562] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  768.042569] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  768.042572] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  768.042574] RIP: 0010:[<ffffffff8139aae3>]  [<ffffffff8139aae3>] find_next_zero_bit+0x43/0xe0
[  768.042579] RSP: 0018:ffff8801de5cb4b8  EFLAGS: 00000287
[  768.042581] RAX: ffcfffffffffffff RBX: ffff88017e17cb40 RCX: 000000000000001b
[  768.042582] RDX: 0000000000000025 RSI: 0000000000008000 RDI: 0000000000005ec0
[  768.042584] RBP: ffff8801de5cb4b8 R08: ffff880087fe8430 R09: 0000000000002140
[  768.042585] R10: ffffea000215bcc0 R11: 0000000000000002 R12: ffff8801dedf2ac0
[  768.042587] R13: ffff880036104400 R14: 0000000000001a0c R15: 0000000000002125
[  768.042592] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  768.042594] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  768.042596] CR2: 00007f4eb642d000 CR3: 00000001e061b000 CR4: 00000000001406f0
[  768.042599] Stack:
[  768.042600]  ffff8801de5cb528 ffffffffc03ffe19 ffff8801de5cb508 ffff8800eabdfa00
[  768.042603]  0000000001977000 0000000000000000 0000000000001b77 0000000000000001
[  768.042606]  ffff880036104400 ffff88017e17cb40 0000000001b77000 ffff8801de5cb5e8
[  768.042609] Call Trace:
[  768.042634]  [<ffffffffc03ffe19>] btrfs_bitmap_cluster+0x99/0x1e0 [btrfs]
[  768.042650]  [<ffffffffc0400f74>] setup_cluster_bitmap+0xe4/0x130 [btrfs]
[  768.042663]  [<ffffffffc0404051>] btrfs_find_space_cluster+0x2c1/0x2f0 [btrfs]
[  768.042673]  [<ffffffffc03a9738>] find_free_extent+0x468/0xc50 [btrfs]
[  768.042683]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  768.042695]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  768.042708]  [<ffffffffc03dbe70>] ? end_extent_writepage+0xa0/0xa0 [btrfs]
[  768.042719]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  768.042731]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  768.042743]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  768.042747]  [<ffffffff811a2900>] ? SyS_msync+0x230/0x230
[  768.042759]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  768.042771]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  768.042782]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  768.042792]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  768.042803]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  768.042807]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  768.042810]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  768.042813]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  768.042816]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  768.042819]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  768.042822]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  768.042825]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  768.042828]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  768.042831]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  768.042834]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  768.042838]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  768.042842]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  768.042845]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  768.042848]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  768.042851]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  768.042854]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  768.042858]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  768.042861]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  768.042863] Code: e9 06 49 83 e1 c0 4c 8d 04 cf 48 89 f7 4c 29 cf 83 e2 3f 75 6b 48 f7 c7 c0 ff ff ff 74 30 49 8b 00 49 83 c0 08 48 83 f8 ff 74 12 <eb> 41 0f 1f 00 49 8b 00 49 83 c0 08 48 83 f8 ff 75 31 48 83 ef 
[  768.042894] NMI backtrace for cpu 1
[  768.042896] CPU: 1 PID: 6646 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  768.042898] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  768.042900] task: ffff8801e02b3cc0 ti: ffff88002f4b4000 task.ti: ffff88002f4b4000
[  768.042901] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  768.042907] RSP: 0018:ffff88002f4b7e08  EFLAGS: 00000046
[  768.042909] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  768.042911] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  768.042912] RBP: ffff88002f4b7e48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  768.042914] R10: 0000000000000000 R11: 00000000000006ac R12: 000000000000b08a
[  768.042916] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  768.042919] FS:  00007f5a87e04740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  768.042921] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  768.042923] CR2: 00007fff2f2feff8 CR3: 000000002f4c6000 CR4: 00000000001406e0
[  768.042926] Stack:
[  768.042927]  ffffffff00000001 0000000000000001 ffff88002f4b7e68 0000000000000001
[  768.042930]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  768.042933]  ffff88002f4b7e58 ffffffff8104efbe ffff88002f4b7e78 ffffffff8104ab78
[  768.042936] Call Trace:
[  768.042941]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  768.042945]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  768.042950]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  768.042953]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  768.042956]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  768.042961]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  768.042965]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  768.042969]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  768.042972]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  768.042973] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  778.054477] SysRq : Show backtrace of all active CPUs
[  778.057079] sending NMI to all CPUs:
[  778.057112] NMI backtrace for cpu 0
[  778.057116] CPU: 0 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  778.057118] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  778.057125] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  778.057128] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  778.057130] RIP: 0010:[<ffffffffc03ffe1c>]  [<ffffffffc03ffe1c>] btrfs_bitmap_cluster+0x9c/0x1e0 [btrfs]
[  778.057156] RSP: 0018:ffff8801de5cb4c8  EFLAGS: 00000202
[  778.057158] RAX: 0000000000002a07 RBX: ffff88017e17cd40 RCX: 000000000000003b
[  778.057159] RDX: 0000000000002a07 RSI: 0000000000008000 RDI: 0000000000005600
[  778.057160] RBP: ffff8801de5cb528 R08: ffff880087338540 R09: 0000000000002a00
[  778.057162] R10: 0000000000000000 R11: 0000000000000002 R12: ffff8801dedf2ac0
[  778.057163] R13: ffff880036104380 R14: 0000000000001278 R15: 0000000000002a05
[  778.057169] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  778.057170] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  778.057172] CR2: 00007f4eb642d000 CR3: 00000000ea9df000 CR4: 00000000001406f0
[  778.057175] Stack:
[  778.057176]  ffff8801de5cb508 ffff8800eabdee00 0000000000125000 0000000000000535
[  778.057179]  0000000000000325 0000000000000001 ffff880036104380 ffff88017e17cd40
[  778.057182]  0000000000325000 ffff8801de5cb5e8 ffff8800eabdee00 0000007441c00000
[  778.057185] Call Trace:
[  778.057200]  [<ffffffffc0400f74>] setup_cluster_bitmap+0xe4/0x130 [btrfs]
[  778.057213]  [<ffffffffc0404051>] btrfs_find_space_cluster+0x2c1/0x2f0 [btrfs]
[  778.057223]  [<ffffffffc03a9738>] find_free_extent+0x468/0xc50 [btrfs]
[  778.057233]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  778.057245]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  778.057258]  [<ffffffffc03dbe70>] ? end_extent_writepage+0xa0/0xa0 [btrfs]
[  778.057270]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  778.057281]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  778.057293]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  778.057297]  [<ffffffff811a2900>] ? SyS_msync+0x230/0x230
[  778.057309]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  778.057320]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  778.057332]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  778.057342]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  778.057353]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  778.057357]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  778.057360]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  778.057363]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  778.057366]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  778.057369]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  778.057372]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  778.057375]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  778.057378]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  778.057381]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  778.057385]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  778.057388]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  778.057392]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  778.057396]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  778.057399]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  778.057402]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  778.057405]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  778.057409]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  778.057411]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  778.057413] Code: 45 c8 0f 1f 44 00 00 48 8b 7b 28 48 89 ca eb 2c 0f 1f 80 00 00 00 00 48 8b 7b 28 48 89 c2 be 00 80 00 00 e8 87 ac f9 c0 48 89 c2 <4c> 29 fa 48 3b 55 c8 73 3b 48 8b 7b 28 48 8d 50 01 be 00 80 00 
[  778.057443] NMI backtrace for cpu 1
[  778.057446] CPU: 1 PID: 6655 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  778.057448] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  778.057450] task: ffff8801e02b1e60 ti: ffff88002f7dc000 task.ti: ffff88002f7dc000
[  778.057452] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  778.057458] RSP: 0018:ffff88002f7dfe08  EFLAGS: 00000046
[  778.057459] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  778.057461] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  778.057463] RBP: ffff88002f7dfe48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  778.057465] R10: 0000000000000000 R11: 0000000000000702 R12: 000000000000b08a
[  778.057466] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  778.057470] FS:  00007f47221a6740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  778.057472] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  778.057473] CR2: 00007fff25f1eff8 CR3: 000000002f7e7000 CR4: 00000000001406e0
[  778.057476] Stack:
[  778.057477]  ffffffff00000001 0000000000000001 ffff88002f7dfe68 0000000000000001
[  778.057480]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  778.057483]  ffff88002f7dfe58 ffffffff8104efbe ffff88002f7dfe78 ffffffff8104ab78
[  778.057487] Call Trace:
[  778.057491]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  778.057495]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  778.057500]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  778.057503]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  778.057506]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  778.057510]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  778.057514]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  778.057518]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  778.057521]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  778.057522] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  788.069552] SysRq : Show backtrace of all active CPUs
[  788.072275] sending NMI to all CPUs:
[  788.072309] NMI backtrace for cpu 0
[  788.072314] CPU: 0 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  788.072316] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  788.072322] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  788.072325] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  788.072327] RIP: 0010:[<ffffffff8139ab49>]  [<ffffffff8139ab49>] find_next_zero_bit+0xa9/0xe0
[  788.072332] RSP: 0018:ffff8801de5cb4b8  EFLAGS: 00000a07
[  788.072334] RAX: 000000000000ffff RBX: ffff88008970f140 RCX: 0000000000000030
[  788.072335] RDX: 0000000000000010 RSI: 0000000000008000 RDI: 0000000000007e40
[  788.072337] RBP: ffff8801de5cb4b8 R08: ffff880086ee7038 R09: 00000000000001c0
[  788.072339] R10: 0000000000000040 R11: 0000000000000002 R12: ffff8801dedf2ac0
[  788.072340] R13: ffff8800e9b32d40 R14: 00000000000001c0 R15: 00000000000001d0
[  788.072346] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  788.072347] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  788.072349] CR2: 00007f4eb642d000 CR3: 00000000ea9df000 CR4: 00000000001406f0
[  788.072350] Stack:
[  788.072352]  ffff8801de5cb528 ffffffffc03ffe19 ffff8801de5cb508 ffff8801de949400
[  788.072355]  00000000007c9000 0000000000000000 00000000000009c9 0000000000000001
[  788.072358]  ffff8800e9b32d40 ffff88008970f140 00000000009c9000 ffff8801de5cb5e8
[  788.072361] Call Trace:
[  788.072385]  [<ffffffffc03ffe19>] btrfs_bitmap_cluster+0x99/0x1e0 [btrfs]
[  788.072398]  [<ffffffffc0400f74>] setup_cluster_bitmap+0xe4/0x130 [btrfs]
[  788.072412]  [<ffffffffc0404051>] btrfs_find_space_cluster+0x2c1/0x2f0 [btrfs]
[  788.072422]  [<ffffffffc03a9738>] find_free_extent+0x468/0xc50 [btrfs]
[  788.072432]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  788.072444]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  788.072457]  [<ffffffffc03dbe70>] ? end_extent_writepage+0xa0/0xa0 [btrfs]
[  788.072468]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  788.072481]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  788.072493]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  788.072497]  [<ffffffff811a2900>] ? SyS_msync+0x230/0x230
[  788.072509]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  788.072521]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  788.072532]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  788.072543]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  788.072553]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  788.072557]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  788.072560]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  788.072564]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  788.072567]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  788.072570]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  788.072573]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  788.072576]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  788.072579]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  788.072582]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  788.072585]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  788.072589]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  788.072593]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  788.072596]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  788.072599]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  788.072602]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  788.072605]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  788.072609]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  788.072612]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  788.072613] Code: 09 d0 48 83 f8 ff 74 4a 48 f7 d0 f3 48 0f bc c0 4c 01 c8 5d c3 0f 1f 44 00 00 b9 40 00 00 00 48 c7 c0 ff ff ff ff 29 d1 48 d3 e8 <49> 0b 00 48 83 ff 3f 76 bf 48 83 f8 ff 75 ce 49 83 c0 08 48 83 
[  788.072645] NMI backtrace for cpu 1
[  788.072647] CPU: 1 PID: 6660 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  788.072649] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  788.072651] task: ffff8801e02b5100 ti: ffff88002f450000 task.ti: ffff88002f450000
[  788.072652] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  788.072658] RSP: 0018:ffff88002f453e08  EFLAGS: 00000046
[  788.072660] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  788.072661] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  788.072663] RBP: ffff88002f453e48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  788.072665] R10: 0000000000000000 R11: 0000000000000757 R12: 000000000000b08a
[  788.072666] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  788.072670] FS:  00007f40ac27e740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  788.072672] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  788.072674] CR2: 00000000009c3128 CR3: 000000002f7de000 CR4: 00000000001406e0
[  788.072677] Stack:
[  788.072678]  ffffffff00000001 0000000000000001 ffff88002f453e68 0000000000000001
[  788.072681]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  788.072684]  ffff88002f453e58 ffffffff8104efbe ffff88002f453e78 ffffffff8104ab78
[  788.072687] Call Trace:
[  788.072692]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  788.072695]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  788.072700]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  788.072703]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  788.072706]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  788.072710]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  788.072714]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  788.072718]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  788.072721]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  788.072723] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  798.085152] SysRq : Show backtrace of all active CPUs
[  798.088151] sending NMI to all CPUs:
[  798.088205] NMI backtrace for cpu 1
[  798.088210] CPU: 1 PID: 939 Comm: rs:main Q:Reg Not tainted 3.16.0-031600rc7-generic #201407271635
[  798.088212] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  798.088214] task: ffff8801e0365b20 ti: ffff8800e9858000 task.ti: ffff8800e9858000
[  798.088216] RIP: 0033:[<0000000000413792>]  [<0000000000413792>] 0x413792
[  798.088226] RSP: 002b:00007f1a58e00790  EFLAGS: 00000246
[  798.088227] RAX: 0000000001d4fdf0 RBX: 0000000001d66240 RCX: 0000000000000000
[  798.088229] RDX: 0000000001d66070 RSI: 0000000000000000 RDI: 0000000001d7f578
[  798.088230] RBP: 00000000006801d8 R08: 0000000001d66300 R09: 0000000000000000
[  798.088232] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000001d7f578
[  798.088233] R13: 00007f1a540008c0 R14: 0000000000000000 R15: 0000000001d5d478
[  798.088239] FS:  00007f1a58e01700(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  798.088241] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  798.088242] CR2: 00007f1a500941c8 CR3: 0000000036063000 CR4: 00000000001406e0
[  798.088245] 
[  798.088248] NMI backtrace for cpu 0
[  798.088251] CPU: 0 PID: 6665 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  798.088252] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  798.088254] task: ffff8800360c46e0 ti: ffff88002dd34000 task.ti: ffff88002dd34000
[  798.088255] RIP: 0010:[<ffffffff81001408>]  [<ffffffff81001408>] xen_hypercall_event_channel_op+0x8/0x20
[  798.088261] RSP: 0018:ffff8801efc03ce0  EFLAGS: 00000006
[  798.088263] RAX: 0000000000000000 RBX: ffff88002a076450 RCX: 00000000fffffffa
[  798.088265] RDX: 0000000000000000 RSI: ffff8801efc03cf4 RDI: 0000000000000004
[  798.088266] RBP: ffff8801efc03cf8 R08: ffff8801eb400490 R09: 0000000000000000
[  798.088268] R10: ffff8801eb400538 R11: 0000000000000000 R12: ffff8801de49e000
[  798.088269] R13: ffff8800e9393e00 R14: 0000000000000001 R15: ffffffff81af7918
[  798.088273] FS:  00007fe2bd3a1740(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  798.088275] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  798.088277] CR2: 0000000000dbc128 CR3: 000000002dd5c000 CR4: 00000000001406f0
[  798.088279] Stack:
[  798.088281]  ffffffff8145cf81 0000000000000001 000000142a076450 ffff8801efc03d48
[  798.088284]  ffffffff814e97ea ffff88002a074730 0000000012248411 ffff8801efc03d48
[  798.088287]  ffff8800e9393e00 000000000005b735 0000000000000000 ffff88002a074730
[  798.088289] Call Trace:
[  798.088291]  <IRQ> 
[  798.088293]  [<ffffffff8145cf81>] ? notify_remote_via_irq+0x31/0x50
[  798.088301]  [<ffffffff814e97ea>] do_blkif_request+0x13a/0x1e0
[  798.088306]  [<ffffffff81354937>] __blk_run_queue+0x37/0x50
[  798.088309]  [<ffffffff81354a8d>] blk_start_queue+0x2d/0x50
[  798.088312]  [<ffffffff814ea135>] kick_pending_request_queues+0x25/0x40
[  798.088315]  [<ffffffff814ea2d2>] blkif_interrupt+0x182/0x3a0
[  798.088319]  [<ffffffff810cf20d>] handle_irq_event_percpu+0x5d/0x1e0
[  798.088322]  [<ffffffff810cf3d8>] handle_irq_event+0x48/0x70
[  798.088326]  [<ffffffff810d2027>] handle_edge_irq+0x77/0x110
[  798.088329]  [<ffffffff810cead2>] generic_handle_irq+0x22/0x40
[  798.088332]  [<ffffffff8145e689>] evtchn_2l_handle_events+0x189/0x250
[  798.088337]  [<ffffffff8145c050>] __xen_evtchn_do_upcall+0x50/0x90
[  798.088340]  [<ffffffff8145e027>] xen_evtchn_do_upcall+0x37/0x50
[  798.088345]  [<ffffffff817938bd>] xen_hvm_callback_vector+0x6d/0x80
[  798.088347]  <EOI> 
[  798.088348]  [<ffffffff8104a7f7>] ? default_send_IPI_mask_sequence_phys+0xa7/0xe0
[  798.088357]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  798.088360]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  798.088365]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  798.088368]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  798.088370]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  798.088375]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  798.088380]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  798.088383]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  798.088386]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  798.088388] Code: cc cc cc b8 1f 00 00 00 0f 01 c1 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc b8 20 00 00 00 0f 01 c1 <c3> cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 
[  808.100348] SysRq : Show backtrace of all active CPUs
[  808.103046] sending NMI to all CPUs:
[  808.103081] NMI backtrace for cpu 0
[  808.103086] CPU: 0 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  808.103088] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  808.103095] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  808.103098] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  808.103100] RIP: 0010:[<ffffffffc0400a38>]  [<ffffffffc0400a38>] tree_search_offset.isra.27+0x28/0x220 [btrfs]
[  808.103123] RSP: 0018:ffff8801de5cb4d8  EFLAGS: 00000206
[  808.103125] RAX: 0000000000000000 RBX: ffff8801df760100 RCX: 0000000000000000
[  808.103127] RDX: 0000007321c00000 RSI: ffff880036104564 RDI: ffff8801df760f00
[  808.103128] RBP: ffff8801de5cb508 R08: 0000000000000001 R09: 00000000002a6000
[  808.103130] R10: 0000000000000001 R11: 0000000000000002 R12: 0000007321c00000
[  808.103131] R13: ffff8801df760100 R14: ffff8801dedf2ac0 R15: ffff8801dedf2ac0
[  808.103136] FS:  0000000000000000(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  808.103138] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  808.103140] CR2: 00007f4eb642d000 CR3: 00000000ea9df000 CR4: 00000000001406f0
[  808.103143] Stack:
[  808.103144]  00000000002a6000 0000000000000001 00000000000004a6 ffff8801de5cb5e8
[  808.103147]  ffff880036104540 ffff8800eabde400 ffff8801de5cb588 ffffffffc0400c78
[  808.103150]  ffff8800eabde200 00000072e1c00000 ffff8801de5cb588 ffffffffc0400f74
[  808.103153] Call Trace:
[  808.103168]  [<ffffffffc0400c78>] setup_cluster_no_bitmap+0x48/0x260 [btrfs]
[  808.103180]  [<ffffffffc0400f74>] ? setup_cluster_bitmap+0xe4/0x130 [btrfs]
[  808.103192]  [<ffffffffc0403eba>] btrfs_find_space_cluster+0x12a/0x2f0 [btrfs]
[  808.103202]  [<ffffffffc03a9738>] find_free_extent+0x468/0xc50 [btrfs]
[  808.103212]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  808.103224]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  808.103237]  [<ffffffffc03dbe70>] ? end_extent_writepage+0xa0/0xa0 [btrfs]
[  808.103248]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  808.103260]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  808.103271]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  808.103275]  [<ffffffff811a2900>] ? SyS_msync+0x230/0x230
[  808.103287]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  808.103299]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  808.103310]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  808.103320]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  808.103331]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  808.103335]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  808.103338]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  808.103341]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  808.103344]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  808.103347]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  808.103350]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  808.103353]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  808.103356]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  808.103359]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  808.103362]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  808.103367]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  808.103370]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  808.103374]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  808.103377]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  808.103380]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  808.103383]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  808.103387]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  808.103390]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  808.103391] Code: 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 55 45 31 ed 41 54 49 89 d4 53 48 89 fb 48 83 ec 18 48 85 ff 75 14 eb 23 66 0f 1f 44 00 00 <4c> 8b 6b 10 4d 85 ed 74 14 4c 89 eb 4c 39 63 18 77 ee 73 6c 4c 
[  808.103422] NMI backtrace for cpu 1
[  808.103424] CPU: 1 PID: 6670 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  808.103426] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  808.103428] task: ffff8801e02b5100 ti: ffff88011d0e0000 task.ti: ffff88011d0e0000
[  808.103429] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  808.103435] RSP: 0018:ffff88011d0e3e08  EFLAGS: 00000046
[  808.103437] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000001000000
[  808.103438] RDX: 0000000000000001 RSI: 0000000000000100 RDI: 0000000000000300
[  808.103440] RBP: ffff88011d0e3e48 R08: ffffffff81d0c8a0 R09: 0000000000000000
[  808.103442] R10: 0000000000000000 R11: 00000000000007ee R12: 000000000000b08a
[  808.103444] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  808.103447] FS:  00007fb7a7437740(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  808.103449] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  808.103451] CR2: 000000000122f128 CR3: 000000011d101000 CR4: 00000000001406e0
[  808.103454] Stack:
[  808.103455]  ffffffff00000001 0000000000000001 ffff88011d0e3e68 0000000000000001
[  808.103458]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  808.103461]  ffff88011d0e3e58 ffffffff8104efbe ffff88011d0e3e78 ffffffff8104ab78
[  808.103464] Call Trace:
[  808.103469]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  808.103472]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  808.103477]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  808.103480]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  808.103483]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  808.103488]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  808.103492]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  808.103495]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  808.103498]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  808.103500] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  818.115603] SysRq : Show backtrace of all active CPUs
[  818.118287] sending NMI to all CPUs:
[  818.118324] NMI backtrace for cpu 0
[  818.118328] CPU: 0 PID: 6675 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  818.118329] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  818.118331] task: ffff8800360c46e0 ti: ffff88002dfe8000 task.ti: ffff88002dfe8000
[  818.118333] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  818.118341] RSP: 0018:ffff88002dfebe08  EFLAGS: 00000046
[  818.118343] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000000000000
[  818.118344] RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000300
[  818.118346] RBP: ffff88002dfebe48 R08: ffffffff81d0c8a8 R09: 0000000000000000
[  818.118348] R10: 0000000000000000 R11: 0000000000000844 R12: 000000000000b08a
[  818.118350] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  818.118356] FS:  00007f7a23ade740(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  818.118358] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  818.118359] CR2: 0000000000f20128 CR3: 0000000022c03000 CR4: 00000000001406f0
[  818.118363] Stack:
[  818.118364]  ffffffff00000000 0000000000000000 ffff88002dfebe68 0000000000000001
[  818.118367]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  818.118370]  ffff88002dfebe58 ffffffff8104efbe ffff88002dfebe78 ffffffff8104ab78
[  818.118373] Call Trace:
[  818.118378]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  818.118382]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  818.118386]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  818.118389]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  818.118392]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  818.118397]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  818.118401]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  818.118405]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  818.118409]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  818.118411] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  818.118464] NMI backtrace for cpu 1
[  818.118467] CPU: 1 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  818.118468] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  818.118474] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  818.118476] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  818.118478] RIP: 0010:[<ffffffff8139aac5>]  [<ffffffff8139aac5>] find_next_zero_bit+0x25/0xe0
[  818.118483] RSP: 0018:ffff8801de5cb4f8  EFLAGS: 00000206
[  818.118484] RAX: 0000000000008000 RBX: ffff8800a0380b68 RCX: 0000000000000088
[  818.118486] RDX: 0000000000002232 RSI: 0000000000008000 RDI: 0000000000008000
[  818.118487] RBP: ffff8801de5cb4f8 R08: ffff880036278440 R09: 0000000000002200
[  818.118489] R10: 0000000000000000 R11: 0000000000000002 R12: ffff8800e94ad0a4
[  818.118490] R13: 0000000000002232 R14: 0000000000000041 R15: 0000000000000ba6
[  818.118494] FS:  0000000000000000(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  818.118495] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  818.118497] CR2: 00007f4eb642d000 CR3: 0000000036063000 CR4: 00000000001406e0
[  818.118499] Stack:
[  818.118500]  ffff8801de5cb558 ffffffffc0400813 ffff8801de51ef60 ffff8800a0380b58
[  818.118503]  ffff8801de5cb590 ffff8801de5cb588 ffff880100000001 ffff8800a0380b40
[  818.118506]  ffff8801de5cb6d0 ffff8800e94ad080 ffff8801de5cb5f0 0000000000001000
[  818.118509] Call Trace:
[  818.118533]  [<ffffffffc0400813>] search_bitmap.isra.24+0xb3/0x120 [btrfs]
[  818.118547]  [<ffffffffc04010dc>] find_free_space+0x11c/0x1a0 [btrfs]
[  818.118560]  [<ffffffffc0403990>] btrfs_find_space_for_alloc+0x60/0x180 [btrfs]
[  818.118570]  [<ffffffffc03a9658>] find_free_extent+0x388/0xc50 [btrfs]
[  818.118580]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  818.118592]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  818.118606]  [<ffffffffc03dbe70>] ? end_extent_writepage+0xa0/0xa0 [btrfs]
[  818.118617]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  818.118629]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  818.118641]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  818.118645]  [<ffffffff811a2900>] ? SyS_msync+0x230/0x230
[  818.118656]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  818.118668]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  818.118679]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  818.118690]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  818.118700]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  818.118704]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  818.118707]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  818.118710]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  818.118713]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  818.118717]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  818.118719]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  818.118724]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  818.118727]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  818.118730]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  818.118733]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  818.118737]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  818.118741]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  818.118744]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  818.118748]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  818.118751]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  818.118754]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  818.118757]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  818.118759]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  818.118761] Code: 84 00 00 00 00 00 55 48 39 f2 48 89 f0 48 89 e5 0f 83 81 00 00 00 48 89 d1 49 89 d1 48 c1 e9 06 49 83 e1 c0 4c 8d 04 cf 48 89 f7 <4c> 29 cf 83 e2 3f 75 6b 48 f7 c7 c0 ff ff ff 74 30 49 8b 00 49 
[  828.130975] SysRq : Show backtrace of all active CPUs
[  828.133757] sending NMI to all CPUs:
[  828.133788] NMI backtrace for cpu 0
[  828.133792] CPU: 0 PID: 6680 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  828.133794] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  828.133796] task: ffff8800360c46e0 ti: ffff880022d8c000 task.ti: ffff880022d8c000
[  828.133798] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  828.133805] RSP: 0018:ffff880022d8fe08  EFLAGS: 00000046
[  828.133807] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000000000000
[  828.133809] RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000300
[  828.133811] RBP: ffff880022d8fe48 R08: ffffffff81d0c8a8 R09: 0000000000000000
[  828.133812] R10: 0000000000000000 R11: 000000000000089a R12: 000000000000b08a
[  828.133814] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  828.133820] FS:  00007f17c063a740(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  828.133822] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  828.133823] CR2: 00000000007f6128 CR3: 0000000022da3000 CR4: 00000000001406f0
[  828.133827] Stack:
[  828.133828]  ffffffff00000000 0000000000000000 ffff880022d8fe68 0000000000000001
[  828.133832]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  828.133835]  ffff880022d8fe58 ffffffff8104efbe ffff880022d8fe78 ffffffff8104ab78
[  828.133838] Call Trace:
[  828.133843]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  828.133847]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  828.133852]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  828.133855]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  828.133858]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  828.133863]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  828.133867]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  828.133871]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  828.133875]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  828.133877] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  828.133929] NMI backtrace for cpu 1
[  828.133932] CPU: 1 PID: 90 Comm: kworker/u30:3 Not tainted 3.16.0-031600rc7-generic #201407271635
[  828.133933] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  828.133938] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[  828.133941] task: ffff8801de51ef60 ti: ffff8801de5c8000 task.ti: ffff8801de5c8000
[  828.133943] RIP: 0010:[<ffffffff8139aaa1>]  [<ffffffff8139aaa1>] find_next_zero_bit+0x1/0xe0
[  828.133947] RSP: 0018:ffff8801de5cb4b8  EFLAGS: 00000297
[  828.133949] RAX: 00000000000013c8 RBX: ffff880089715f00 RCX: 000000000000000b
[  828.133950] RDX: 00000000000013c8 RSI: 0000000000008000 RDI: ffff880085fa4000
[  828.133952] RBP: ffff8801de5cb528 R08: ffff880085fa4280 R09: 00000000000013c0
[  828.133953] R10: 0000000000000000 R11: 0000000000000002 R12: ffff8801dedf2ac0
[  828.133955] R13: ffff8800e9b32ac0 R14: 0000000000000048 R15: 00000000000013c8
[  828.133958] FS:  0000000000000000(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  828.133960] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  828.133961] CR2: 00007f4eb642d000 CR3: 0000000036063000 CR4: 00000000001406e0
[  828.133963] Stack:
[  828.133964]  ffff8801de5cb528 ffffffffc03ffe19 ffff8801de5cb508 ffff8801de94aa00
[  828.133967]  0000000000f43000 0000000000001097 0000000000001143 0000000000000001
[  828.133969]  ffff8800e9b32ac0 ffff880089715f00 0000000001143000 ffff8801de5cb5e8
[  828.133972] Call Trace:
[  828.133995]  [<ffffffffc03ffe19>] ? btrfs_bitmap_cluster+0x99/0x1e0 [btrfs]
[  828.134010]  [<ffffffffc0400f74>] setup_cluster_bitmap+0xe4/0x130 [btrfs]
[  828.134023]  [<ffffffffc0404051>] btrfs_find_space_cluster+0x2c1/0x2f0 [btrfs]
[  828.134034]  [<ffffffffc03a9738>] find_free_extent+0x468/0xc50 [btrfs]
[  828.134043]  [<ffffffffc03a9fe7>] btrfs_reserve_extent+0xa7/0x130 [btrfs]
[  828.134055]  [<ffffffffc03c518b>] cow_file_range+0x13b/0x450 [btrfs]
[  828.134068]  [<ffffffffc03dbe70>] ? end_extent_writepage+0xa0/0xa0 [btrfs]
[  828.134079]  [<ffffffffc03c600c>] run_delalloc_range+0x8c/0x90 [btrfs]
[  828.134091]  [<ffffffffc03dbd54>] writepage_delalloc.isra.34+0xf4/0x170 [btrfs]
[  828.134102]  [<ffffffffc03de0bf>] __extent_writepage+0xcf/0x280 [btrfs]
[  828.134106]  [<ffffffff811a2900>] ? SyS_msync+0x230/0x230
[  828.134117]  [<ffffffffc03de52a>] extent_write_cache_pages.isra.26.constprop.40+0x2ba/0x420 [btrfs]
[  828.134129]  [<ffffffffc03deb9e>] extent_writepages+0x4e/0x70 [btrfs]
[  828.134140]  [<ffffffffc03c3260>] ? btrfs_read_locked_inode+0x610/0x610 [btrfs]
[  828.134150]  [<ffffffffc03b5070>] ? btree_writepages+0x60/0x80 [btrfs]
[  828.134160]  [<ffffffffc03c00b8>] btrfs_writepages+0x28/0x30 [btrfs]
[  828.134164]  [<ffffffff811764b0>] do_writepages+0x20/0x40
[  828.134168]  [<ffffffff812074e5>] __writeback_single_inode+0x45/0x1c0
[  828.134175]  [<ffffffff81174482>] ? mapping_tagged+0x12/0x20
[  828.134178]  [<ffffffff81208ebe>] writeback_sb_inodes+0x22e/0x340
[  828.134181]  [<ffffffff8120906e>] __writeback_inodes_wb+0x9e/0xd0
[  828.134184]  [<ffffffff8120932b>] wb_writeback+0x28b/0x330
[  828.134187]  [<ffffffff8116c3c7>] ? mempool_free_slab+0x17/0x20
[  828.134190]  [<ffffffff8120941e>] ? wb_check_old_data_flush+0x4e/0xb0
[  828.134192]  [<ffffffff81209604>] wb_do_writeback+0x184/0x1c0
[  828.134196]  [<ffffffff8120b558>] bdi_writeback_workfn+0x78/0x1f0
[  828.134200]  [<ffffffff8109ef88>] ? finish_task_switch+0x128/0x180
[  828.134204]  [<ffffffff8108c72f>] process_one_work+0x17f/0x4c0
[  828.134208]  [<ffffffff8108d49b>] worker_thread+0x11b/0x3f0
[  828.134211]  [<ffffffff8108d380>] ? create_and_start_worker+0x80/0x80
[  828.134214]  [<ffffffff810944a9>] kthread+0xc9/0xe0
[  828.134217]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  828.134220]  [<ffffffff817919bc>] ret_from_fork+0x7c/0xb0
[  828.134223]  [<ffffffff810943e0>] ? flush_kthread_worker+0xb0/0xb0
[  828.134225] Code: 85 c0 75 d4 49 83 c0 08 48 83 ef 40 49 83 c1 40 e9 6e ff ff ff 0f 1f 44 00 00 49 8d 04 39 5d c3 66 2e 0f 1f 84 00 00 00 00 00 55 <48> 39 f2 48 89 f0 48 89 e5 0f 83 81 00 00 00 48 89 d1 49 89 d1 
[  838.146365] SysRq : Show backtrace of all active CPUs
[  838.149100] sending NMI to all CPUs:
[  838.149131] NMI backtrace for cpu 0
[  838.149135] CPU: 0 PID: 6685 Comm: tee Not tainted 3.16.0-031600rc7-generic #201407271635
[  838.149137] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  838.149139] task: ffff8800360c46e0 ti: ffff88001ea28000 task.ti: ffff88001ea28000
[  838.149142] RIP: 0010:[<ffffffff8104a7f0>]  [<ffffffff8104a7f0>] default_send_IPI_mask_sequence_phys+0xa0/0xe0
[  838.149154] RSP: 0018:ffff88001ea2be08  EFLAGS: 00000046
[  838.149156] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000000000000
[  838.149157] RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000300
[  838.149158] RBP: ffff88001ea2be48 R08: ffffffff81d0c8a8 R09: 0000000000000000
[  838.149160] R10: 0000000000000000 R11: 00000000000008f0 R12: 000000000000b08a
[  838.149161] R13: ffffffff81d0c8a0 R14: 0000000000000400 R15: 0000000000000292
[  838.149167] FS:  00007fa0c282a740(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[  838.149169] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  838.149171] CR2: 00000000021c2128 CR3: 000000002ddfd000 CR4: 00000000001406f0
[  838.149174] Stack:
[  838.149176]  ffffffff00000000 0000000000000000 ffff88001ea2be68 0000000000000001
[  838.149179]  ffffffff81ca2aa0 0000000000000004 0000000000000000 0000000000000008
[  838.149182]  ffff88001ea2be58 ffffffff8104efbe ffff88001ea2be78 ffffffff8104ab78
[  838.149194] Call Trace:
[  838.149200]  [<ffffffff8104efbe>] physflat_send_IPI_mask+0xe/0x10
[  838.149204]  [<ffffffff8104ab78>] arch_trigger_all_cpu_backtrace+0x108/0x110
[  838.149209]  [<ffffffff8147fdb3>] sysrq_handle_showallcpus+0x13/0x20
[  838.149213]  [<ffffffff814801c9>] __handle_sysrq+0x119/0x170
[  838.149218]  [<ffffffff81480253>] write_sysrq_trigger+0x33/0x40
[  838.149227]  [<ffffffff812417d3>] proc_reg_write+0x43/0x70
[  838.149232]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  838.149235]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  838.149242]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  838.149244] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff <eb> 9e 4c 89 ff 57 9d 0f 1f 44 00 00 48 83 c4 18 5b 41 5c 41 5d 
[  838.149298] NMI backtrace for cpu 1
[  838.149301] CPU: 1 PID: 939 Comm: rs:main Q:Reg Not tainted 3.16.0-031600rc7-generic #201407271635
[  838.149303] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/23/2014
[  838.149304] task: ffff8801e0365b20 ti: ffff8800e9858000 task.ti: ffff8800e9858000
[  838.149306] RIP: 0010:[<ffffffff8138dd22>]  [<ffffffff8138dd22>] __radix_tree_lookup+0x82/0xb0
[  838.149311] RSP: 0018:ffff8800e985bb58  EFLAGS: 00000206
[  838.149313] RAX: ffffea0000884fc0 RBX: ffff8800eb200218 RCX: 0000000000000000
[  838.149314] RDX: 0000000000000000 RSI: 0000000000000150 RDI: 0000000000000001
[  838.149315] RBP: ffff8800e985bb58 R08: ffff8801a29f9ff0 R09: ffff8800e985bb70
[  838.149317] R10: ffff8801a29fa098 R11: 0000000000000293 R12: 0000000000000150
[  838.149318] R13: 00000000000200da R14: 000000000000035c R15: 00000000000000d0
[  838.149322] FS:  00007f1a58e01700(0000) GS:ffff8801efc20000(0000) knlGS:0000000000000000
[  838.149324] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  838.149325] CR2: 00007f4eb642d000 CR3: 0000000036063000 CR4: 00000000001406e0
[  838.149328] Stack:
[  838.149329]  ffff8800e985bb78 ffffffff8138dd73 ffff8800eb2000c0 ffff8800e985bbf0
[  838.149332]  ffff8800e985bb98 ffffffff81169aee 000000000000000f ffff8800eb200210
[  838.149335]  ffff8800e985bbe8 ffffffff8116a3dc 0000000000004ad1 0000000000000150
[  838.149338] Call Trace:
[  838.149342]  [<ffffffff8138dd73>] radix_tree_lookup_slot+0x13/0x30
[  838.149346]  [<ffffffff81169aee>] find_get_entry+0x1e/0x90
[  838.149349]  [<ffffffff8116a3dc>] pagecache_get_page+0x3c/0x1d0
[  838.149353]  [<ffffffff8116a5a4>] grab_cache_page_write_begin+0x34/0x50
[  838.149357]  [<ffffffff812641e9>] ext4_da_write_begin+0x89/0x2d0
[  838.149361]  [<ffffffff81168d7e>] generic_perform_write+0xbe/0x1c0
[  838.149365]  [<ffffffff811f9881>] ? update_time+0x81/0xc0
[  838.149369]  [<ffffffff811fdba2>] ? mnt_clone_write+0x12/0x30
[  838.149372]  [<ffffffff8116b62f>] __generic_file_write_iter+0x16f/0x360
[  838.149375]  [<ffffffff8125a0a1>] ext4_file_write_iter+0x111/0x3d0
[  838.149380]  [<ffffffff8100b2f0>] ? xen_clocksource_read+0x20/0x30
[  838.149383]  [<ffffffff8100b2f0>] ? xen_clocksource_read+0x20/0x30
[  838.149386]  [<ffffffff811deceb>] new_sync_write+0x7b/0xb0
[  838.149390]  [<ffffffff811dfa07>] vfs_write+0xc7/0x1f0
[  838.149393]  [<ffffffff811dff0f>] SyS_write+0x4f/0xb0
[  838.149396]  [<ffffffff81791c7f>] tracesys+0xe1/0xe6
[  838.149397] Code: d1 81 77 e1 8d 0c 7f 8d 4c 09 fa eb 07 0f 1f 40 00 49 89 c0 48 89 f0 48 d3 e8 83 e0 3f 48 83 c0 04 4d 8d 54 c0 08 49 8b 44 c0 08 <48> 85 c0 74 21 83 e9 06 83 ef 01 75 d9 48 85 d2 74 03 4c 89 02