soft lockup, propagate_mnt, kernel 3.14.6-200.fc20

gistfile1.txt

[3703320.879085] CPU: 9 PID: 67661 Comm: (mlink.py) Not tainted 3.14.6-200.fc20.x86_64 #1
[3703320.879085] Hardware name: Xen HVM domU, BIOS 4.1.5 11/28/2013
[3703320.879085] task: ffff880bd77c1300 ti: ffff880159a1e000 task.ti: ffff880159a1e000
[3703320.879085] RIP: 0010:[<ffffffff81216854>]  [<ffffffff81216854>] next_group+0x34/0xd0
[3703320.879085] RSP: 0018:ffff880159a1fe10  EFLAGS: 00000246
[3703320.879085] RAX: ffff88012ff26db8 RBX: ffffffff8120a958 RCX: ffff88009d236580
[3703320.879085] RDX: ffff88009d236628 RSI: ffff88012ff26d00 RDI: ffff88009d236580
[3703320.879085] RBP: ffff880159a1fe10 R08: 00000000000001df R09: ffffe8ffd1ded168
[3703320.879085] R10: 0000000000001400 R11: 0000000000000000 R12: 0000000000000000
[3703320.879085] R13: ffff880159a1fe58 R14: ffff88012ff26d00 R15: ffff88012ff26300
[3703320.879085] FS:  00007f36a23b28c0(0000) GS:ffff881634320000(0000) knlGS:0000000000000000
[3703320.879085] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[3703320.879085] CR2: 00000000048d0008 CR3: 000000073d050000 CR4: 00000000000006e0
[3703320.879085] Stack:
[3703320.879085]  ffff880159a1fe48 ffffffff81216f0b ffff88009d236580 ffff88012ff26d00
[3703320.879085]  0000000000000000 ffff881367f45000 0000000000000000 ffff880159a1fe90
[3703320.879085]  ffffffff8120a372 ffff88009d234b40 00000000e598252a ffff881367f45000
[3703320.879085] Call Trace:
[3703320.879085]  [<ffffffff81216f0b>] propagate_mnt+0x10b/0x170
[3703320.879085]  [<ffffffff8120a372>] attach_recursive_mnt+0x142/0x240
[3703320.879085]  [<ffffffff8120a4c5>] graft_tree+0x55/0x70
[3703320.879085]  [<ffffffff8120b8d2>] do_mount+0x952/0xae0
[3703320.879085]  [<ffffffff8120bd96>] SyS_mount+0x96/0xf0
[3703320.879085]  [<ffffffff81700629>] system_call_fastpath+0x16/0x1b
[3703320.879085] Code: 48 83 bf e0 00 00 00 00 74 13 48 8b 87 b8 00 00 00 48 8d 97 b8 00 00 00 48 39 d0 75 6d 44 8b 86 00 01 00 00 44 39 87 00 01 00 00 <48> 8b 97 a8 00 00 00 48 8d 8a 58 ff ff ff 74 74 48 8b 87 c8 00
[root@endpoint7e52fd96 ~]#
Message from syslogd@endpoint7e52fd96 at Jul 25 15:44:59 ...
 kernel:[3703348.879071] BUG: soft lockup - CPU#9 stuck for 22s! [(mlink.py):67661]