Public bug reported:
After switching a few times between paths I noticed that device-mapper
started logging the following messages:
[ 2478.345027] device-mapper: table: 251:0: multipath: error getting device
[ 2478.346588] device-mapper: ioctl: error adding target to table
And in the output of echo w >/proc/sysrq-trigger I noticed that several
I/O threads were hanging:
[ 4474.630041] Call Trace:
[ 4474.631257] [<ffffffff811712e0>] ? sync_buffer+0x0/0x50
[ 4474.631257] [<ffffffff8155ed83>] io_schedule+0x73/0xc0
[ 4474.631257] [<ffffffff81171325>] sync_buffer+0x45/0x50
[ 4474.631257] [<ffffffff8155f3cf>] __wait_on_bit+0x5f/0x90
[ 4474.631257] [<ffffffff811712e0>] ? sync_buffer+0x0/0x50
[ 4474.631257] [<ffffffff8155f478>] out_of_line_wait_on_bit+0x78/0x90
[ 4474.631257] [<ffffffff810864b0>] ? wake_bit_function+0x0/0x40
[ 4474.631257] [<ffffffff811712d6>] __wait_on_buffer+0x26/0x30
[ 4474.631257] [<ffffffff812180a8>] journal_commit_transaction+0x498/0xe40
[ 4474.631257] [<ffffffff81077d4c>] ? lock_timer_base+0x3c/0x70
[ 4474.631257] [<ffffffff81078819>] ? try_to_del_timer_sync+0x79/0xd0
[ 4474.631257] [<ffffffff8121b95d>] kjournald+0xed/0x250
[ 4474.631257] [<ffffffff81086470>] ? autoremove_wake_function+0x0/0x40
[ 4474.631257] [<ffffffff8121b870>] ? kjournald+0x0/0x250
[ 4474.631257] [<ffffffff810860f6>] kthread+0x96/0xa0
[ 4474.631257] [<ffffffff810141aa>] child_rip+0xa/0x20
[ 4474.631257] [<ffffffff81086060>] ? kthread+0x0/0xa0
[ 4474.631257] [<ffffffff810141a0>] ? child_rip+0x0/0x20
The above call stack was triggered by running a fio data integrity test
on a filesystem on top of a dm device while switching over paths.
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-42-server 2.6.32-42.95
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-42.95-server 2.6.32.59+drm33.24
Uname: Linux 2.6.32-42-server x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
AplayDevices: Error: [Errno 2] No such file or directory
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path',
'/dev/snd/controlC1', '/dev/snd/hwC1D0', '/dev/snd/pcmC1D3p',
'/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c',
'/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D1c', '/dev/snd/pcmC0D1p',
'/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info: Error: [Errno 2] No such file or directory
Card0.Amixer.values: Error: [Errno 2] No such file or directory
Card1.Amixer.info: Error: [Errno 2] No such file or directory
Card1.Amixer.values: Error: [Errno 2] No such file or directory
Date: Thu Aug 16 17:43:43 2012
HibernationDevice: RESUME=UUID=ed6b25d1-0e71-46ec-aae4-502e9ce1cc58
InstallationMedia: Ubuntu-Server 10.04.4 LTS "Lucid Lynx" - Release amd64
(20120214.2)
MachineType: System manufacturer P5Q DELUXE
ProcCmdLine: root=UUID=4c2434f2-aec2-4664-8df2-f2d2ad65b039 ro quiet
ProcEnviron:
SHELL=/bin/bash
LANG=en_US.UTF-8
RelatedPackageVersions: linux-firmware 1.34.14
RfKill:
SourcePackage: linux
dmi.bios.date: 07/10/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2301
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5Q DELUXE
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr2301:bd07/10/2009:svnSystemmanufacturer:pnP5QDELUXE:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5QDELUXE:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: P5Q DELUXE
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug kernel-fixed-upstream lucid
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https://bugs.launchpad.net/bugs/1037648
Title:
Hanging I/O causes multipath not to work properly
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