Could these traces in dmesg caused a server halt?

[ptemmerman]

Hi all,

I'm seeing these messages in /var/log/dmesg and was wondering what they mean. I can't seem to find any good explanation googling for it...

I want to know whether this could be related to my server suddenly stopping.


[2543286.782963] ------------[ cut here ]------------
[2543286.782977] WARNING: at /build/buildd/linux-2.6.35/block/blk-core.c:338 blk_start_queue+0x70/0x80()
[2543286.782981] Modules linked in: xfs exportfs acpiphp
[2543286.782995] Pid: 223, comm: udevd Tainted: G W 2.6.35-24-virtual #42-Ubuntu
[2543286.782999] Call Trace:
[2543286.783010] [<c0152862>] warn_slowpath_common+0x72/0xa0
[2543286.783016] [<c034b540>] ? blk_start_queue+0x70/0x80
[2543286.783022] [<c034b540>] ? blk_start_queue+0x70/0x80
[2543286.783028] [<c01528b2>] warn_slowpath_null+0x22/0x30
[2543286.783033] [<c034b540>] blk_start_queue+0x70/0x80
[2543286.783042] [<c04279d1>] kick_pending_request_queues+0x21/0x30
[2543286.783047] [<c0427bc8>] blkif_interrupt+0x198/0x1c0
[2543286.783077] [<c01b0314>] handle_IRQ_event+0x44/0x150
[2543286.783087] [<c01b0484>] ? irq_to_desc+0x14/0x20
[2543286.783095] [<c01b3a09>] ? move_native_irq+0x19/0x50
[2543286.783101] [<c01b2554>] handle_edge_irq+0xb4/0x150
[2543286.783109] [<c03df822>] xen_evtchn_do_upcall+0x152/0x170
[2543286.783116] [<c0109997>] xen_do_upcall+0x7/0xc
[2543286.783124] [<c02200e0>] ? hwpoison_user_mappings+0xb0/0x1f0
[2543286.783130] [<c0102227>] ? hypercall_page+0x227/0x1010
[2543286.783139] [<c010679a>] ? xen_force_evtchn_callback+0x1a/0x30
[2543286.783145] [<c0106f5c>] check_events+0x8/0xc
[2543286.783151] [<c0106f1b>] ? xen_irq_enable_direct_end+0x0/0x1
[2543286.783157] [<c0109367>] ? sysenter_past_esp+0x44/0x6a
[2543286.783161] ---[ end trace a82068aa59b01997 ]---
[2543286.783164] ------------[ cut here ]------------
[2543286.783170] WARNING: at /build/buildd/linux-2.6.35/block/blk-core.c:246 blk_remove_plug+0x80/0x90()
[2543286.783173] Modules linked in: xfs exportfs acpiphp
[2543286.783185] Pid: 223, comm: udevd Tainted: G W 2.6.35-24-virtual #42-Ubuntu
[2543286.783189] Call Trace:
[2543286.783195] [<c0152862>] warn_slowpath_common+0x72/0xa0
[2543286.783201] [<c03492e0>] ? blk_remove_plug+0x80/0x90
[2543286.783206] [<c03492e0>] ? blk_remove_plug+0x80/0x90
[2543286.783212] [<c01528b2>] warn_slowpath_null+0x22/0x30
[2543286.783217] [<c03492e0>] blk_remove_plug+0x80/0x90
[2543286.783223] [<c034b300>] __blk_run_queue+0x10/0x110
[2543286.783228] [<c034b509>] blk_start_queue+0x39/0x80
[2543286.783234] [<c04279d1>] kick_pending_request_queues+0x21/0x30
[2543286.783240] [<c0427bc8>] blkif_interrupt+0x198/0x1c0
[2543286.783246] [<c01b0314>] handle_IRQ_event+0x44/0x150
[2543286.783251] [<c01b0484>] ? irq_to_desc+0x14/0x20
[2543286.783257] [<c01b3a09>] ? move_native_irq+0x19/0x50
[2543286.783262] [<c01b2554>] handle_edge_irq+0xb4/0x150
[2543286.783268] [<c03df822>] xen_evtchn_do_upcall+0x152/0x170
[2543286.783273] [<c0109997>] xen_do_upcall+0x7/0xc
[2543286.783279] [<c02200e0>] ? hwpoison_user_mappings+0xb0/0x1f0
[2543286.783285] [<c0102227>] ? hypercall_page+0x227/0x1010
[2543286.783290] [<c010679a>] ? xen_force_evtchn_callback+0x1a/0x30
[2543286.783296] [<c0106f5c>] check_events+0x8/0xc
[2543286.783302] [<c0106f1b>] ? xen_irq_enable_direct_end+0x0/0x1
[2543286.783307] [<c0109367>] ? sysenter_past_esp+0x44/0x6a
[2543286.783311] ---[ end trace a82068aa59b01998 ]---
[2543286.788770] ------------[ cut here ]------------
[2543286.788777] WARNING: at /build/buildd/linux-2.6.35/block/blk-core.c:338 blk_start_queue+0x70/0x80()
[2543286.788781] Modules linked in: xfs exportfs acpiphp
[2543286.788794] Pid: 1, comm: init Tainted: G W 2.6.35-24-virtual #42-Ubuntu
[2543286.788797] Call Trace:
[2543286.788805] [<c0152862>] warn_slowpath_common+0x72/0xa0
[2543286.788810] [<c034b540>] ? blk_start_queue+0x70/0x80
[2543286.788816] [<c034b540>] ? blk_start_queue+0x70/0x80
[2543286.788822] [<c01528b2>] warn_slowpath_null+0x22/0x30
[2543286.788830] [<c034b540>] blk_start_queue+0x70/0x80
[2543286.788837] [<c04279d1>] kick_pending_request_queues+0x21/0x30
[2543286.788842] [<c0427bc8>] blkif_interrupt+0x198/0x1c0
[2543286.788849] [<c010679a>] ? xen_force_evtchn_callback+0x1a/0x30
[2543286.788855] [<c01b0314>] handle_IRQ_event+0x44/0x150
[2543286.788861] [<c01b0484>] ? irq_to_desc+0x14/0x20
[2543286.788867] [<c01b3a09>] ? move_native_irq+0x19/0x50
[2543286.788873] [<c01b2554>] handle_edge_irq+0xb4/0x150
[2543286.788879] [<c03df822>] xen_evtchn_do_upcall+0x152/0x170
[2543286.788885] [<c0109997>] xen_do_upcall+0x7/0xc
[2543286.788889] ---[ end trace a82068aa59b01999 ]---
[2543286.788892] ------------[ cut here ]------------
[2543286.788896] WARNING: at /build/buildd/linux-2.6.35/block/blk-core.c:246 blk_remove_plug+0x80/0x90()
[2543286.788900] Modules linked in: xfs exportfs acpiphp
[2543286.788911] Pid: 1, comm: init Tainted: G W 2.6.35-24-virtual #42-Ubuntu
[2543286.788914] Call Trace:
[2543286.788920] [<c0152862>] warn_slowpath_common+0x72/0xa0
[2543286.788926] [<c03492e0>] ? blk_remove_plug+0x80/0x90
[2543286.788931] [<c03492e0>] ? blk_remove_plug+0x80/0x90
[2543286.788937] [<c01528b2>] warn_slowpath_null+0x22/0x30
[2543286.788942] [<c03492e0>] blk_remove_plug+0x80/0x90
[2543286.788948] [<c034b300>] __blk_run_queue+0x10/0x110
[2543286.788953] [<c034b509>] blk_start_queue+0x39/0x80
[2543286.788959] [<c04279d1>] kick_pending_request_queues+0x21/0x30
[2543286.788964] [<c0427bc8>] blkif_interrupt+0x198/0x1c0
[2543286.788970] [<c010679a>] ? xen_force_evtchn_callback+0x1a/0x30
[2543286.788976] [<c01b0314>] handle_IRQ_event+0x44/0x150
[2543286.788981] [<c01b0484>] ? irq_to_desc+0x14/0x20
[2543286.788987] [<c01b3a09>] ? move_native_irq+0x19/0x50
[2543286.788993] [<c01b2554>] handle_edge_irq+0xb4/0x150
[2543286.788998] [<c03df822>] xen_evtchn_do_upcall+0x152/0x170
[2543286.789004] [<c0109997>] xen_do_upcall+0x7/0xc
[2543286.789007] ---[ end trace a82068aa59b0199a ]---

[Rubberman]

Are you running this in a xen virtual machine, or is this a xen host?

[ptemmerman]

I think so, as this is a AWS instance.
I don't know if it helps, but just in case: I also partitioned a volume with LVM