On 24/09/2021 19:17, Naveen N. Rao wrote:
Hi Cascardo,
Thanks for reporting this.
Thadeu Lima de Souza Cascardo wrote:
quoted
Hi, there.
We have been investigating an issue we have observed on POWER8 POWERNV systems.
When running the kernel selftests reuseport_bpf_cpu after a CPU hotplug, we see
crashes, in different forms. [1]
Just to re-confirm: you are only seeing this on P8 powernv, and not in a
P8 guest/LPAR? I haven't been able to reproduce this on a firestone --
can you share more details about your power8 machine?
Also, do you only see this with ubuntu kernels, or are you also able to
reproduce this with the upstream tree?
Let me just covert this part of your email:
Upstream trees (5.11, 5.13, 5.14). See also:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1927076/comments/28
I could not reproduce it on Power8 LPAR. Neither on Power9 QEMU guest.
Reproduced on few machines:
IBM, POWER8NVL, 8335-GTB
POWER8, 8001-22C and 8335-GTA
lspcpu for the last one:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1927076/comments/15
Best regards,
Krzysztof