** Description changed: - Almost half of the ubuntu_ltp_controllers tests are failing due to the - general pattern 'cgroup_name already mounted or mount point busy' - causing the tests to fail. + Almost half of the ubuntu_ltp_controllers tests (142 out of 198) are + failing due to the general pattern 'cgroup_name already mounted or mount + point busy' causing the tests to fail. e.g. mount: /dev/cgroup: ltp_cgroup already mounted or mount point busy. cgroup_fj_function2_memory 1 TBROK: mount -t cgroup -o memory ltp_cgroup /dev/cgroup failed From investigation it seems there could be an issue with the transition to cgroup-v2. There have been rumors on the ltp mailing list that one of these days the tests could break due to the transition. Switching to cgroup-v2, likely due to a systemd update, could cause these tests to break due to different mount and cgroup hierarchy semantics. I could only reproduce a subset of the new failures we are seeing, but after setting systemd.unified_cgroup_hierarchy=0 on the kernel command line which sets cgroup back to v1, a lot of the failures I could produce went away.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1949532 Title: ubuntu_ltp_controllers tests failing on Impish ($cgroup_name already mounted or mount point busy) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1949532/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
