On 24/09/2021 19:17, Naveen N. Rao wrote: > Hi Cascardo, > Thanks for reporting this. > > > Thadeu Lima de Souza Cascardo wrote: >> 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