Кто-нить знает что это может быть за сообщения в /var/log/messages логах и как этого не допустить.

May 15 19:06:25 ubuntu kernel: [2162767.781961] nginx D ebd35cf4 0 31121 989 0x00000000
May 15 19:06:25 ubuntu kernel: [2162767.781964] ebd35cf8 00200286 c194bf20 ebd35cf4 c065e1e0 eb8bc484 c065e1e0 c065e1e0
May 15 19:06:25 ubuntu kernel: [2162767.781967] c065e1e0 eb8bc484 c065e1e0 c065e1e0 ec26b3c0 0007aed0 ed8021e0 eb8bc1f0
May 15 19:06:25 ubuntu kernel: [2162767.781971] 00008a8a c25cc918 ebd35d28 c25cc918 ebd35cf8 c01477c9 c25cc918 d5852fa0
May 15 19:06:25 ubuntu kernel: [2162767.781974] Call Trace:
May 15 19:06:25 ubuntu kernel: [2162767.781976] [<c01477c9>] ? prepare_to_wait+0x39/0x60
May 15 19:06:25 ubuntu kernel: [2162767.781980] [<c027a255>] do_get_write_access+0x225/0x400
May 15 19:06:25 ubuntu kernel: [2162767.781982] [<c01475e0>] ? wake_bit_function+0x0/0x50
May 15 19:06:25 ubuntu kernel: [2162767.781985] [<c027a5a3>] journal_get_write_access+0x23/0x40
May 15 19:06:25 ubuntu kernel: [2162767.781987] [<c026b59f>] __ext3_journal_get_write_access+0x1f/0x50
May 15 19:06:25 ubuntu kernel: [2162767.781990] [<c025ec11>] ext3_reserve_inode_write+0x61/0x80
May 15 19:06:25 ubuntu kernel: [2162767.782091] [<c025ec4d>] ext3_mark_inode_dirty+0x1d/0x40
May 15 19:06:25 ubuntu kernel: [2162767.782094] [<c025ed99>] ext3_dirty_inode+0x49/0x80
May 15 19:06:25 ubuntu kernel: [2162767.782097] [<c046005c>] ? ip_queue_xmit+0x13c/0x370
May 15 19:06:25 ubuntu kernel: [2162767.782101] [<c01ded6e>] __mark_inode_dirty+0x2e/0x110
May 15 19:06:25 ubuntu kernel: [2162767.782104] [<c01d4557>] file_update_time+0xb7/0x100
May 15 19:06:25 ubuntu kernel: [2162767.782106] [<c018f85b>] __generic_file_aio_write_nolock+0x1bb/0x500
May 15 19:06:25 ubuntu kernel: [2162767.782109] [<c01256ae>] ? dequeue_task_fair+0x2e/0x40
May 15 19:06:25 ubuntu kernel: [2162767.782111] [<c018fca9>] generic_file_aio_write+0x59/0xd0
May 15 19:06:25 ubuntu kernel: [2162767.782114] [<c025bd2d>] ext3_file_write+0x2d/0xc0
May 15 19:06:25 ubuntu kernel: [2162767.782117] [<c01c0d6c>] do_sync_write+0xbc/0x100
May 15 19:06:25 ubuntu kernel: [2162767.782119] [<c01067b6>] ? xen_clocksource_read+0x26/0x1f0
May 15 19:06:25 ubuntu kernel: [2162767.782122] [<c01475a0>] ? autoremove_wake_function+0x0/0x40
May 15 19:06:25 ubuntu kernel: [2162767.782126] [<c0344aef>] ? security_file_permission+0xf/0x20
May 15 19:06:25 ubuntu kernel: [2162767.782128] [<c01c0f0d>] ? rw_verify_area+0x5d/0xd0
May 15 19:06:25 ubuntu kernel: [2162767.782131] [<c01f2c21>] ? ep_poll+0x1d1/0x1f0
May 15 19:06:25 ubuntu kernel: [2162767.782133] [<c01c101a>] vfs_write+0x9a/0x190
May 15 19:06:25 ubuntu kernel: [2162767.782135] [<c01c0cb0>] ? do_sync_write+0x0/0x100
May 15 19:06:25 ubuntu kernel: [2162767.782137] [<c01c18ed>] sys_write+0x3d/0x70
May 15 19:06:25 ubuntu kernel: [2162767.782139] [<c0104625>] syscall_call+0x7/0xb