Unfortunately, it doesn't seem to be the same bug, but might be similar. I can still reporduce the issue with the upstream daily-build.
I can reproduce it on an Ubuntu Impish host (kernel 5.11.0-31-generic, systemd 248.3-1ubuntu3), running an Ubuntu Impish container (kernel 5.11.0-31-generic, systemd 249.743.g8fd4d27f3c+21.10.20210909132725 – daily upstream build from [ppa:ubuntu-support-team/systemd](https://launchpad.net/~ubuntu-support-team/+archive/ubuntu/systemd)) – or basically any container that uses the unified cgroups hierarchy (like Fedora 34, as mentioned before). Interestingly, in other places that try to read `memory.current` (cgtop.c/cgroup.c) there is a fallback to `memory.usage_in_bytes` if the system does not detect an all unified hierarchy. But those seem to be mutually exclusive: On a host using the **hybrid** hierarchy I can only see `memory.usage_in_bytes` (same goes for hybrid container on hybrid host): ``` $ find /sys/fs/cgroup/ -wholename *system.slice/memory.current $ find /sys/fs/cgroup/ -wholename *system.slice/memory.usage_in_bytes /sys/fs/cgroup/memory/system.slice/memory.usage_in_bytes ``` => Tests are skipped ("test-oomd-util: cgroups are not running in unified mode, skipping tests.") On a host using the **unified** hierarchy I can only see `memory.current` (same goes for unified container on unified host and hybrid container on unified host): ``` $ find /sys/fs/cgroup/ -wholename *system.slice/memory.current /sys/fs/cgroup/system.slice/memory.current $ find /sys/fs/cgroup/ -wholename *system.slice/memory.usage_in_bytes ``` => Tests pass as expected. BUT: Inside a **unified** container on a **hybrid** host, I can see neither: ``` $ find /sys/fs/cgroup/ -wholename *system.slice/memory.current $ find /sys/fs/cgroup/ -wholename *system.slice/memory.usage_in_bytes ``` => This is a problem. The test fails, because it cannot access `memory.current` but is not skiped either. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1942113 Title: systemd unit test regression in autopkgtest (oomd-utils) Status in glibc package in Ubuntu: New Status in systemd package in Ubuntu: New Bug description: The latest systemd upload fails its tests against glibc 2.34. The failing test is test-oomd-util within the unit-tests, with the following logs: Last pgscan 33 greater than current pgscan 1 for /herp.slice/derp.scope. Using last pgscan of zero. Last pgscan 33 greater than current pgscan 1 for /herp.slice/derp.scope. Using last pgscan of zero. Last pgscan 33 greater than current pgscan 2 for /zupa.slice. Using last pgscan of zero. Last pgscan 33 greater than current pgscan 2 for /zupa.slice. Using last pgscan of zero. Last pgscan 33 greater than current pgscan 1 for /herp.slice/derp.scope. Using last pgscan of zero. Last pgscan 33 greater than current pgscan 2 for /zupa.slice. Using last pgscan of zero. Last pgscan 33 greater than current pgscan 1 for /herp.slice/derp.scope. Using last pgscan of zero. Bus n/a: changing state UNSET → OPENING sd-bus: starting bus by connecting to /run/dbus/system_bus_socket... Bus n/a: changing state OPENING → AUTHENTICATING Bus n/a: changing state AUTHENTICATING → HELLO Sent message type=method_call sender=n/a destination=org.freedesktop.DBus path=/org/freedesktop/DBus interface=org.freedesktop.DBus member=Hello cookie=1 reply_cookie=0 signature=n/a error-name=n/a error-message=n/a Sent message type=method_call sender=n/a destination=org.freedesktop.DBus path=/org/freedesktop/DBus interface=org.freedesktop.DBus member=AddMatch cookie=2 reply_cookie=0 signature=s error-name=n/a error-message=n/a Got message type=method_return sender=org.freedesktop.DBus destination=:1.23 path=n/a interface=n/a member=n/a cookie=1 reply_cookie=1 signature=s error-name=n/a error-message=n/a Bus n/a: changing state HELLO → RUNNING Sent message type=method_call sender=n/a destination=org.freedesktop.systemd1 path=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=StartTransientUnit cookie=3 reply_cookie=0 signature=ssa(sv)a(sa(sv)) error-name=n/a error-message=n/a Got message type=method_return sender=:1.0 destination=:1.23 path=n/a interface=n/a member=n/a cookie=299 reply_cookie=3 signature=o error-name=n/a error-message=n/a Got message type=signal sender=org.freedesktop.DBus destination=:1.23 path=/org/freedesktop/DBus interface=org.freedesktop.DBus member=NameAcquired cookie=2 reply_cookie=0 signature=s error-name=n/a error-message=n/a Got message type=method_return sender=org.freedesktop.DBus destination=:1.23 path=n/a interface=n/a member=n/a cookie=3 reply_cookie=2 signature=n/a error-name=n/a error-message=n/a Match type='signal',sender='org.freedesktop.systemd1',path='/org/freedesktop/systemd1',interface='org.freedesktop.systemd1.Manager',member='JobRemoved' successfully installed. Got message type=signal sender=:1.0 destination=n/a path=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=JobRemoved cookie=304 reply_cookie=0 signature=uoss error-name=n/a error-message=n/a Got result done/Success for job test-oomd-util-9beb716b2ffb3d99.scope Bus n/a: changing state RUNNING → CLOSED Found cgroup2 on /sys/fs/cgroup/, full unified hierarchy test-oomd-util: Cannot set user xattrs, skipping tests. Error getting memory.current from /system.slice/test-oomd-util-9beb716b2ffb3d99.scope: No data available Assertion 'oomd_cgroup_context_acquire(cgroup, &ctx) == 0' failed at src/oom/test-oomd-util.c:117, function test_oomd_cgroup_context_acquire_and_insert(). Aborting. I wasn't able to reproduce the failure, either using autopkgtest-virt- lxd or manually in an armhf VM. You'll find below the test logs of the VM run for this particular test, as a comparison point. ubuntu@autopkgtest:~$ sudo /usr/lib/systemd/tests/test-oomd-util Last pgscan 33 greater than current pgscan 2 for /zupa.slice. Using last pgscan of zero. Last pgscan 33 greater than current pgscan 1 for /herp.slice/derp.scope. Using last pgscan of zero. Last pgscan 33 greater than current pgscan 2 for /zupa.slice. Using last pgscan of zero. Last pgscan 33 greater than current pgscan 1 for /herp.slice/derp.scope. Using last pgscan of zero. Last pgscan 33 greater than current pgscan 2 for /zupa.slice. Using last pgscan of zero. Last pgscan 33 greater than current pgscan 2 for /zupa.slice. Using last pgscan of zero. Last pgscan 33 greater than current pgscan 1 for /herp.slice/derp.scope. Using last pgscan of zero. Bus n/a: changing state UNSET → OPENING sd-bus: starting bus by connecting to /run/dbus/system_bus_socket... Bus n/a: changing state OPENING → AUTHENTICATING Bus n/a: changing state AUTHENTICATING → HELLO Sent message type=method_call sender=n/a destination=org.freedesktop.DBus path=/org/freedesktop/DBus interface=org.freedesktop.DBus member=Hello cookie=1 reply_cookie=0 signature=n/a error-name=n/a error-message =n/a Sent message type=method_call sender=n/a destination=org.freedesktop.DBus path=/org/freedesktop/DBus interface=org.freedesktop.DBus member=AddMatch cookie=2 reply_cookie=0 signature=s error-name=n/a error-messag e=n/a Got message type=method_return sender=org.freedesktop.DBus destination=:1.13 path=n/a interface=n/a member=n/a cookie=1 reply_cookie=1 signature=s error-name=n/a error-message=n/a Bus n/a: changing state HELLO → RUNNING Sent message type=method_call sender=n/a destination=org.freedesktop.systemd1 path=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=StartTransientUnit cookie=3 reply_cookie=0 signature =ssa(sv)a(sa(sv)) error-name=n/a error-message=n/a Got message type=method_return sender=:1.2 destination=:1.13 path=n/a interface=n/a member=n/a cookie=228 reply_cookie=3 signature=o error-name=n/a error-message=n/a Got message type=signal sender=org.freedesktop.DBus destination=:1.13 path=/org/freedesktop/DBus interface=org.freedesktop.DBus member=NameAcquired cookie=2 reply_cookie=0 signature=s error-name=n/a error-messag e=n/a Got message type=method_return sender=org.freedesktop.DBus destination=:1.13 path=n/a interface=n/a member=n/a cookie=3 reply_cookie=2 signature=n/a error-name=n/a error-message=n/a Match type='signal',sender='org.freedesktop.systemd1',path='/org/freedesktop/systemd1',interface='org.freedesktop.systemd1.Manager',member='JobRemoved' successfully installed. Got message type=signal sender=:1.2 destination=n/a path=/org/freedesktop/systemd1 interface=org.freedesktop.systemd1.Manager member=JobRemoved cookie=233 reply_cookie=0 signature=uoss error-name=n/a error-messa ge=n/a Got result done/Success for job test-oomd-util-72cb961924930039.scope Bus n/a: changing state RUNNING → CLOSED Found cgroup2 on /sys/fs/cgroup/, full unified hierarchy oomd attempting to kill 893 with KILL oomd attempting to kill 894 with KILL oomd attempting to kill 895 with KILL oomd attempting to kill 896 with KILL Last pgscan 18446744073709551615 greater than current pgscan 0 for /system.slice/test-oomd-util-72cb961924930039.scope. Using last pgscan of zero. 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