Po-Hsu Lin, Thanks for the info. I was able to reproduce the issue on other 2 Power8 servers, but just running the `reuseport_bpf_cpu test` more than once (as you mentioned on comment#3). I've tested this with focal-hwe (Linux thiel 5.11.0-27-generic) and hirsute (5.11.0-31-generic). steps: 1. Run the cpu-hotplug test; 2. Run the reuseport_bpf_cpu test; 3. re-run the reuseport_bpf_cpu test.
``` thiel login: [24669.414656] Oops: Exception in kernel mode, sig: 4 [#1] [24669.414710] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA PowerNV ``` ``` gulpin login: [277274.876010] Oops: Exception in kernel mode, sig: 4 [#1] [277274.876235] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA PowerNV ``` I've also tested this 2 servers above with the upstream kernel from `https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.11.22/` I put the `reuseport_bpf_cpu test` on 20x loop and did not hit the issue, so I'd say we may have an issue with ubuntu-kernel. all 20x the test reported a success and the server did not reboot. ``` send cpu 157, receive socket 157 send cpu 159, receive socket 159 SUCCESS ``` -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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 Hirsute: New 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1927076/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
