xfs_kernel

INFO: task swift-object-se:31320 blocked for more than 120 seconds.
      Not tainted 2.6.32-573.8.1.el6.x86_64 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
swift-object- D 0000000000000001     0 31320  26257 0x00000000
 ffff883eb56af698 0000000000000082 ffff883eb56af648 0000000000000286
 ffff883eb56af618 ffffffffa04148e5 ffff8875975fe200 ffff8863bf8a95b8
 ffff884a5292d970 ffff884a5292d970 ffff883eb56a9ad8 ffff883eb56affd8
Call Trace:
 [<ffffffffa04148e5>] ? xfs_buf_rele+0x55/0x100 [xfs]
 [<ffffffffa03d7ceb>] ? xfs_btree_del_cursor+0x6b/0x80 [xfs]
 [<ffffffff81539455>] schedule_timeout+0x215/0x2e0
 [<ffffffff810a7577>] ? down_trylock+0x37/0x50
 [<ffffffffa0413fd5>] ? xfs_buf_trylock+0x25/0x80 [xfs]
 [<ffffffff8153aea2>] __down+0x72/0xb0
 [<ffffffffa0415395>] ? _xfs_buf_find+0xe5/0x230 [xfs]
 [<ffffffff810a7681>] down+0x41/0x50
 [<ffffffffa0415201>] xfs_buf_lock+0x51/0x100 [xfs]
 [<ffffffffa0415395>] _xfs_buf_find+0xe5/0x230 [xfs]
 [<ffffffffa0415514>] xfs_buf_get+0x34/0x1b0 [xfs]
 [<ffffffffa0415b9c>] xfs_buf_read+0x2c/0x100 [xfs]
 [<ffffffffa040b477>] xfs_trans_read_buf+0x1f7/0x410 [xfs]
 [<ffffffffa03c0406>] xfs_read_agf+0x66/0x1a0 [xfs]
 [<ffffffffa03c0579>] xfs_alloc_read_agf+0x39/0xd0 [xfs]
 [<ffffffffa03c2fa2>] xfs_alloc_fix_freelist+0x432/0x4a0 [xfs]
 [<ffffffffa0408563>] ? xfs_trans_free_item_desc+0x33/0x40 [xfs]
 [<ffffffffa04086a7>] ? xfs_trans_free_items+0x87/0xb0 [xfs]
 [<ffffffffa0405128>] ? xfs_perag_get+0x38/0xb0 [xfs]
 [<ffffffffa03c30b8>] xfs_free_extent+0xa8/0x130 [xfs]
 [<ffffffffa03ccfcd>] xfs_bmap_finish+0x15d/0x1a0 [xfs]
 [<ffffffffa03f2d91>] xfs_itruncate_extents+0x101/0x280 [xfs]
 [<ffffffffa040ede5>] xfs_inactive+0x2f5/0x450 [xfs]
 [<ffffffffa041c620>] xfs_fs_clear_inode+0xa0/0xd0 [xfs]
 [<ffffffff811af71c>] clear_inode+0xac/0x140
 [<ffffffff811afed6>] generic_delete_inode+0x196/0x1d0
 [<ffffffff811aff75>] generic_drop_inode+0x65/0x80
 [<ffffffff811aedc2>] iput+0x62/0x70
 [<ffffffff811ab7c0>] dentry_iput+0x90/0x100
 [<ffffffff811ab921>] d_kill+0x31/0x60
 [<ffffffff811ad55d>] dput+0xcd/0x160
 [<ffffffff811a36a8>] sys_renameat+0x348/0x3a0
 [<ffffffff811974f4>] ? cp_new_stat+0xe4/0x100
 [<ffffffff811978e6>] ? sys_newstat+0x36/0x50
 [<ffffffff811a371b>] sys_rename+0x1b/0x20
 [<ffffffff8100b0d2>] system_call_fastpath+0x16/0x1b