Dear Karl,
thank you for reporting the problem.
no, it is not known issue.
moreover, I doubt it is related to real hardware interrupts,
soft-interrupts handles delayed procedures like processing of network packets.
For troubleshooting is to look at stack of affected running processes via
/proc/<pid>/stack
alternatively you can use magic sysrq key
# echo l > /proc/sysrq-trigger
it should dump current state of all running processors.
you can do it few times to monitor state of affected processes.
Thank you,
Vasily Averin
On 5/30/19 7:54 PM, Karl Johnson wrote:
> Hello,
>
> I've upgraded from 2.6.32-042stab133.2 to 2.6.32-042stab138.1 and since boot,
> 2 cores are using 100% cpu on ksoftirqd:
>
> root 21 99.9 0.0 0 0 ? R May29 1178:07 \_
> [ksoftirqd/4]
> root 25 99.9 0.0 0 0 ? R May29 1177:51 \_
> [ksoftirqd/5]
>
> From /proc/interrupts I can see that it's caused by IR-IO-APIC-edge
> timer:
>
> CPU0 CPU1 CPU2 CPU3 CPU4 CPU5
> CPU6 CPU7
> 0: 136922 103603 26928 27528 112318229 71888343
> 73755 285735 IR-IO-APIC-edge timer
>
> kernel /vmlinuz-2.6.32-042stab138.1 ro
> root=UUID=7367aa0f-8216-44ca-9cc4-affed22bbd9c rd_NO_LUKS rd_NO_LVM
> LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto
> KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM nohz=off nopti
>
> Any way to troubleshoot this? Is it a known issue?
>
> Karl
>
>
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