using the 4.15.0-041500-generic kernel, the total process count was very
high (473) just after the boot, perhaps something to do with the raid
array resync.
Now doing backup to the external disk, process count seems normal (287).
I still think there is a problem with that process count since older
kernel never showed more than 286 thread in the last year.
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1747597
Title:
Number of processes exploded after upgrade to 4.13.0-32-generic
Status in linux package in Ubuntu:
Confirmed
Bug description:
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.
---
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.
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