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 1912960
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.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: focal
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1912960
Title:
kcryptd, big file copy, system became unresponsive
Status in linux package in Ubuntu:
Incomplete
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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1912960/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : [email protected]
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
