I have started getting following kind of errors on terminal:
Code: Select all
kernel:[245409.251352] watchdog: BUG: soft lockup - CPU#8 stuck for 23s! [pqi fc5f0aa5910:3809237]
Related dmesg command outout is here
Memory usage was like 9GB free, SWAP free was 0 bytes, like 900MB swap total /dev/dm-2 partition (i wish i had created larger swap, now do not know how to exactly increase, this drive has full disk encryption LUKS)
Full system details (inxi).
HERE how the system was utilized during the errors on terminal (dstat command).
I was unable to start some apps at this point (no error, started via GUI only unfortunately), i was unable to "sudo kill -9" one third party pid/app that had "<defunct>" suffix in process list.
Reboot command not did anything so i reset it.
Research:
1)
https://www.suse.com/support/kb/doc/?id=000018705A 'soft lockup' is defined as a bug that causes the kernel to loop in kernel mode for more than 20 seconds without giving other tasks a chance to run.
The watchdog daemon will send an non-maskable interrupt (NMI) to all CPUs in the system who, in turn, print the stack traces of their currently running tasks.
2)
https://askubuntu.com/a/1264905/456366Possible swap/memory problem. ... updating the BIOS ... It's not appropriate to have too small of a swap ... free memtest
It seems I had latest BIOS, even it often shows internal error during check inside BIOS. Memtest done like 1 year ago and wish i do not need to repeat unless someone believes it is really memory issue.
3)
viewtopic.php?p=741322#p741322I added acpi=off after the quiet in the startup kernel parameter. That seems to do the trick!!
4)
viewtopic.php?p=699709#p699709kernel from the debug repository
Questions:
Do you have idea about the cause or which, preferably exact, commands to run next time it happen so it is known where the problem was?
Thank you