After an update from 4.10.0-40-generic to 4.13.0-32-generic (ubuntu 16.04 + hwe kernel), the number of process when doing IO on my machine has exploded.
Before the update, maximum number of process : 284
After the update, doing a simple rsync to an external disk : 771
The system is now unstable and crashes. The processes are hundreds of "kworker".
Please let me know if there is something more needed.
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AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Feb 6 09:04 seq
crw-rw---- 1 root audio 116, 33 Feb 6 09:04 timer
AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.13.0-32-generic.
AplayDevices: aplay: device_list:268: no soundcards found...
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
ArecordDevices: arecord: device_list:268: no soundcards found...
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
DistroRelease: Ubuntu 16.04
IwConfig: Error: [Errno 2] No such file or directory
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
Package: linux (not installed)
PciMultimedia:
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-32-generic root=UUID=ef4f1569-51cf-478d-868c-78a3b7f04a2c ro
ProcVersionSignature: Ubuntu 4.13.0-32.35~16.04.1-generic 4.13.13
RelatedPackageVersions:
linux-restricted-modules-4.13.0-32-generic N/A
linux-backports-modules-4.13.0-32-generic N/A
linux-firmware 1.157.15
RfKill: Error: [Errno 2] No such file or directory
Tags: xenial
Uname: Linux 4.13.0-32-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm audio cdrom dip kvm libvirtd lpadmin lxd plugdev sambashare sudo sudo-no-log video
_MarkForUpload: True
dmi.bios.date: 05/17/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P2.70
dmi.board.name: Z97 Extreme6
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.:bvrP2.70:bd05/17/2016:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ97Extreme6:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.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.
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1747597
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.