[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1319038
Title:
tight loop in rpc_async_schedule and xs_tcp_setup_socket
Status in “linux” package in Ubuntu:
Expired
Bug description:
I have a runaway kworker process on my box this morning:
$ top -b -n 1 | grep kworker/1:2
1403 root 20 0 0 0 0 R 100.0 0.0 472:39.22
kworker/1:2
To debug, I performed the following:
# echo workqueue:workqueue_queue_work > /sys/kernel/debug/tracing/set_event
# cat /sys/kernel/debug/tracing/trace_pipe >/tmp/out.txt
And this reveals to me:
kworker/1:2-1403 [001] d.s. 28777.162387: workqueue_queue_work: work
struct=ffff88021f630788 function=rpc_async_schedule [sunrpc]
workqueue=ffff8807fb77c800 req_cpu=256 cpu=1
kworker/1:2-1403 [001] d... 28777.162387: workqueue_queue_work: work
struct=ffff8807d8511de0 function=xs_tcp_setup_socket [sunrpc]
workqueue=ffff8807fb77c800 req_cpu=256 cpu=1
kworker/1:2-1403 [001] d.s. 28777.162390: workqueue_queue_work: work
struct=ffff88021f630788 function=rpc_async_schedule [sunrpc]
workqueue=ffff8807fb77c800 req_cpu=256 cpu=1
kworker/1:2-1403 [001] d... 28777.162390: workqueue_queue_work: work
struct=ffff8807d8511de0 function=xs_tcp_setup_socket [sunrpc]
workqueue=ffff8807fb77c800 req_cpu=256 cpu=1
kworker/1:2-1403 [001] d.s. 28777.162393: workqueue_queue_work: work
struct=ffff88021f630788 function=rpc_async_schedule [sunrpc]
workqueue=ffff8807fb77c800 req_cpu=256 cpu=1
kworker/1:2-1403 [001] d... 28777.162393: workqueue_queue_work: work
struct=ffff8807d8511de0 function=xs_tcp_setup_socket [sunrpc]
workqueue=ffff8807fb77c800 req_cpu=256 cpu=1
This cycle seems to be repeating indefinitely in a tight loop.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-24-generic 3.13.0-24.47
ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
Date: Tue May 13 08:26:10 2014
HibernationDevice: RESUME=UUID=21e3db75-a4a7-4ded-baa2-b89e143f107f
InstallationDate: Installed on 2014-05-12 (1 days ago)
InstallationMedia: Mythbuntu 14.04 LTS "Trusty Tahr" - Release amd64
(20140417)
IwConfig:
eth0 no wireless extensions.
eth1 no wireless extensions.
lo no wireless extensions.
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcFB: 0 astdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic
root=UUID=2e2a5b15-f468-4daa-998d-13a68dadc74b ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-24-generic N/A
linux-backports-modules-3.13.0-24-generic N/A
linux-firmware 1.127
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
WifiSyslog:
dmi.bios.date: 10/07/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.40
dmi.board.name: E3C224
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrP1.40:bd10/07/2013:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnE3C224:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
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