*** This bug is a duplicate of bug 1909286 ***
https://bugs.launchpad.net/bugs/1909286
I tested that when reuseport_bpf_cpu did not consider the last CPU, the
one that has been hotplugged, it didn't crash. It didn't set affinity to
that CPU, didn't even allocate socket for it.
Then, I realized that attaching the BPF code was happening on that CPU
as it happened right after the tests were run, and the last test set the
CPU affinity to that CPU. So, I set the affinity to CPU 0 right before
attaching the BPF code. So far, the system did not crash either.
Cascardo.
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https://bugs.launchpad.net/bugs/1927076
Title:
IPv6 TCP in reuseport_bpf_cpu from ubuntu_kernel_selftests/net crash
P8 node entei on 5.8 kernel (Oops: Exception in kernel mode, sig: 4
[#1])
Status in ubuntu-kernel-tests:
New
Status in The Ubuntu-power-systems project:
Confirmed
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Focal:
Confirmed
Status in linux source package in Hirsute:
Confirmed
Bug description:
It looks like our P8 node "entei" tend to fail with the IPv6 TCP test
from reuseport_bpf_cpu in ubuntu_kernel_selftests/net on 5.8 kernels:
# send cpu 119, receive socket 119
# send cpu 121, receive socket 121
# send cpu 123, receive socket 123
# send cpu 125, receive socket 125
# send cpu 127, receive socket 127
# ---- IPv6 TCP ----
publish-job-status: using request.json
It failed silently here, this can be 100% reproduced with Groovy 5.8
and Focal 5.8.
This will cause the ubuntu_kernel_selftests being interrupted, the
test result for other tests cannot be processed to our result page.
Please find attachment for the complete "net" test result on this node
with Groovy 5.8.0-52.59
Add the kqa-blocker tag as this might needs to be manually verified.
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