[Virtual-pkg-base-maintainers] Bug#692567: INFO: task blocked for more than 120 seconds when access to Logical Volume
Thomas Boutelier
boutelier.thomas at gmail.com
Wed Nov 7 14:38:48 UTC 2012
Package: base
Severity: normal
I have a script who makes backup of virtual machine each weeks. I create
snapshot of volume group, then I
backup it with dd. Sometimes, I got this message when I access to volume
group (lvcreate, lvdisplay ...).
Lvm command lock up in D state and I can't re-use lvm it until reboot.
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888359] INFO: task
lvdisplay:8411 blocked for more than 120 seconds.
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888413] "echo 0 >
/proc/sys/kernel/hung_task_
timeout_secs" disables this message.
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888464] lvdisplay D
0000000000000000 0 8411 8165 0x00000000
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888471] ffff88007ff93f90
0000000000000286 0000000000000000 0000000000000000
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888479] ffff880071222608
000000006c864f69 000000000000f9e0 ffff880040413fd8
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888487] 0000000000015780
0000000000015780 ffff88007c283170 ffff88007c283468
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888495] Call Trace:
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888504] [<ffffffff8102ddc4>] ?
pvclock_clocksource_read+0x3a/0x8b
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888513] [<ffffffff8130cdda>] ?
io_schedule+0x73/0xb7
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888519] [<ffffffff81115489>] ?
__blockdev_direct_IO+0x910/0xa60
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888525] [<ffffffff81113946>] ?
blkdev_direct_IO+0x45/0x4a
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888531] [<ffffffff81112c5b>] ?
blkdev_get_blocks+0x0/0x8b
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888537] [<ffffffff810b6837>] ?
generic_file_aio_read+0xf6/0x536
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888554] [<ffffffffa01c0b05>] ?
dm_blk_open+0x10/0x5f [dm_mod]
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888559] [<ffffffff81114001>] ?
__blkdev_get+0x29c/0x342
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888564] [<ffffffff811140ae>] ?
blkdev_open+0x0/0x96
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888568] [<ffffffff81114115>] ?
blkdev_open+0x67/0x96
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888575] [<ffffffff810f00dd>] ?
do_sync_read+0xce/0x113
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888580] [<ffffffff810f342f>] ?
cp_new_stat+0xe9/0xfc
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888586] [<ffffffff81066092>] ?
autoremove_wake_function+0x0/0x2e
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888591] [<ffffffff81112ef6>] ?
block_ioctl+0x38/0x3c
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888597] [<ffffffff810fbf3e>] ?
vfs_ioctl+0x21/0x6c
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888602] [<ffffffff810fc48c>] ?
do_vfs_ioctl+0x48d/0x4cb
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888608] [<ffffffff810f0b00>] ?
vfs_read+0xa6/0xff
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888613] [<ffffffff810f0c15>] ?
sys_read+0x45/0x6e
Nov 6 22:07:19 pack-xen03 kernel: [1005246.888619] [<ffffffff81011b42>] ?
system_call_fastpath+0x16/0x1b
-- System Information:
Debian Release: 6.0.5
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.32-5-xen-amd64 (SMP w/24 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
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