Serial console log from a ubuntu_kselftests_ftrace test run. ** Attachment added: "ubuntu_ftrace_smoke_test-console.log" https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/2051378/+attachment/5742658/+files/ubuntu_ftrace_smoke_test-console.log
** Tags added: sru-20231030 sru-20240108 ** Summary changed: - cpuhotplug failures on google seg_snp instances + cpuhotplug failures on google n2d-standard-4.sev_snp VMs -- You received this bug notification because you are a member of Canonical Platform QA Team, which is subscribed to ubuntu-kernel-tests. https://bugs.launchpad.net/bugs/2051378 Title: cpuhotplug failures on google n2d-standard-4.sev_snp VMs Status in ubuntu-kernel-tests: New Bug description: Testing on n2d-standard-4.sev_snp and possibly other sev_snp enabled instances unexpectedly reboot during cpuhotplug operations. This is known to happen during the following tests: ubuntu_ftrace_smoke_test.ftrace-smoke-test ubuntu_kernel_selftests.cpu-hotplug:cpu-on-off-test.sh ubuntu_kselftests_ftrace.ftrace:test.d--00basic--basic2.tc ubuntu_ltp.cpuhotplug:cpuhotplug02 The VM will reboot in most cases interrupting the test. From the console logs we see messages like: ... Jan 25 19:22:13 j-lgcp-gcp-5-15-n2dstd4-sev-snp-u-ftrace-smk-test kernel: [ 192.364513] mmiotrace: Disabling non-boot CPUs... Jan 25 19:22:13 j-lgcp-gcp-5-15-n2dstd4-sev-snp-u-ftrace-smk-test kernel: [ 192.403578] smpboot: CPU 1 is now offline Jan 25 19:22:13 j-lgcp-gcp-5-15-n2dstd4-sev-snp-u-ftrace-smk-test kernel: [ 192.425028] mmiotrace: CPU1 is down. Jan 25 19:22:13 j-lgcp-gcp-5-15-n2dstd4-sev-snp-u-ftrace-smk-test kernel: [ 192.447485] smpboot: CPU 2 is now offline Jan 25 19:22:13 j-lgcp-gcp-5-15-n2dstd4-sev-snp-u-ftrace-smk-test kernel: [ 192.464986] mmiotrace: CPU2 is down. Jan 25 19:22:13 j-lgcp-gcp-5-15-n2dstd4-sev-snp-u-ftrace-smk-test kernel: [ 192.483908] smpboot: CPU 3 is now offline then the VM starts booting again. This has been seen on at least linux-gcp 5.15 and 6.5 kernels since we've started testing on these n2d-standard-4.sev_snp VMs. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/2051378/+subscriptions -- Mailing list: https://launchpad.net/~canonical-ubuntu-qa Post to : canonical-ubuntu-qa@lists.launchpad.net Unsubscribe : https://launchpad.net/~canonical-ubuntu-qa More help : https://help.launchpad.net/ListHelp
