Any operation like cp/rm big file:
top - 09:00:33 up 12 min, 1 user, load average: 11,55, 7,23, 3,60
Tasks: 341 total, 1 running, 340 sleeping, 0 stopped, 0 zombie
%Cpu0 : 1,3 us, 7,0 sy, 0,0 ni, 0,0 id, 91,7 wa, 0,0 hi, 0,0 si, 0,0 st
%Cpu1 : 5,9 us, 7,3 sy, 0,0 ni, 0,0 id, 86,8 wa, 0,0 hi, 0,0 si, 0,0 st
%Cpu2 : 3,7 us, 7,0 sy, 0,3 ni, 27,4 id, 61,5 wa, 0,0 hi, 0,0 si, 0,0 st
%Cpu3 : 3,0 us, 6,6 sy, 0,0 ni, 0,0 id, 90,4 wa, 0,0 hi, 0,0 si, 0,0 st
%Cpu4 : 2,0 us, 6,7 sy, 0,0 ni, 69,3 id, 22,0 wa, 0,0 hi, 0,0 si, 0,0 st
%Cpu5 : 4,7 us, 8,0 sy, 0,7 ni, 0,0 id, 86,7 wa, 0,0 hi, 0,0 si, 0,0 st
%Cpu6 : 4,4 us, 5,8 sy, 0,0 ni, 0,0 id, 89,8 wa, 0,0 hi, 0,0 si, 0,0 st
%Cpu7 : 2,0 us, 6,7 sy, 0,0 ni, 0,0 id, 91,3 wa, 0,0 hi, 0,0 si, 0,0 st
MiB Mem : 31922,9 total, 18111,2 free, 3655,1 used, 10156,6 buff/cache
MiB Swap: 980,0 total, 980,0 free, 0,0 used. 26893,0 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3635 janusz 20 0 2841208 302720 117252 S 8,9 0,9 1:10.78 Web
Content
2059 janusz 20 0 4961508 284548 102652 S 6,9 0,9 0:26.83
gnome-shell
1823 janusz 9 -11 3352488 19036 15332 S 6,3 0,1 0:41.25
pulseaudio
2631 janusz 20 0 819484 53192 38340 S 5,9 0,2 0:07.68
gnome-terminal-
454 root 20 0 0 0 0 D 5,6 0,0 0:08.08
kworker/u16:7+kcryptd/253:0
3452 janusz 20 0 3905104 362944 194092 S 5,6 1,1 0:52.16 firefox
4667 root 20 0 0 0 0 D 5,6 0,0 0:05.93
kworker/u16:3+kcryptd/253:0
126 root 20 0 0 0 0 D 5,3 0,0 0:06.50
kworker/u16:1+kcryptd/253:0
447 root 20 0 0 0 0 D 5,3 0,0 0:07.15
kworker/u16:5+kcryptd/253:0
450 root 20 0 0 0 0 D 5,3 0,0 0:08.38
kworker/u16:6+kcryptd/253:0
457 root 20 0 0 0 0 D 5,3 0,0 0:07.95
kworker/u16:9+kcryptd/253:0
1912 janusz 20 0 873952 76156 43660 S 5,3 0,2 0:15.31 Xorg
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https://bugs.launchpad.net/bugs/1912960
Title:
kcryptd, big file copy, system became unresponsive
Status in linux package in Ubuntu:
Confirmed
Bug description:
ubuntu 20.4
Linux eb850 5.4.0-62-generic #70-Ubuntu SMP Tue Jan 12 12:45:47 UTC 2021
x86_64 x86_64 x86_64 GNU/Linux
Simple copy big file:
janusz@eb850:~$ ls -al tmp.tar.gz
-rw-r--r-- 1 janusz janusz 3847997532 sty 24 20:09 tmp.tar.gz
janusz@eb850:~$ cp tmp.tar.gz tmp2.tar.gz
GUI apps became unresponsive - slack/teams/firefox ...
Top show all CPU (cores) ~100% usage in WA (io and kcryptd).
nvme0n1 259:0 0 465,8G 0 disk
├─nvme0n1p1 259:1 0 512M 0 part /boot/efi
├─nvme0n1p2 259:2 0 732M 0 part /boot
└─nvme0n1p3 259:3 0 464,6G 0 part
└─nvme0n1p3_crypt 253:0 0 464,6G 0 crypt
├─ubuntu--vg-root 253:1 0 463,6G 0 lvm /
└─ubuntu--vg-swap_1 253:2 0 980M 0 lvm [SWAP]
Is there any option that will change/tune kcryptd (dm-crypt) to not use all
cores?
Today any operation like cp/zip/unzip/git with large files, couse I can't use
ubuntu at all.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: janusz 1801 F.... pulseaudio
/dev/snd/pcmC0D0p: janusz 1801 F...m pulseaudio
/dev/snd/pcmC0D6c: janusz 1801 F...m pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2020-04-30 (269 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64
(20190805)
MachineType: HP HP EliteBook 850 G6
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-62-generic
root=/dev/mapper/ubuntu--vg-root ro quiet splash elevator=mq-deadline
vt.handoff=7
ProcVersionSignature: Ubuntu 5.4.0-62.70-generic 5.4.78
RelatedPackageVersions:
linux-restricted-modules-5.4.0-62-generic N/A
linux-backports-modules-5.4.0-62-generic N/A
linux-firmware 1.187.7
Tags: focal
Uname: Linux 5.4.0-62-generic x86_64
UpgradeStatus: Upgraded to focal on 2020-10-31 (85 days ago)
UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 02/18/2020
dmi.bios.vendor: HP
dmi.bios.version: R70 Ver. 01.04.05
dmi.board.name: 8549
dmi.board.vendor: HP
dmi.board.version: KBC Version 52.59.00
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.modalias:
dmi:bvnHP:bvrR70Ver.01.04.05:bd02/18/2020:svnHP:pnHPEliteBook850G6:pvr:rvnHP:rn8549:rvrKBCVersion52.59.00:cvnHP:ct10:cvr:
dmi.product.family: 103C_5336AN HP EliteBook
dmi.product.name: HP EliteBook 850 G6
dmi.product.sku: 6XD81EA#AKD
dmi.sys.vendor: HP
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