Hello,
An end user reported a bug[1] when attempting to use an Ubuntu kernel
with the 5.15 real-time patches applied. The user reports an issue with
missing cg memory when Kubernetes is used with the 5.15 patchset.
After an investigation, it was found the issue is happens if the
CONFIG_MEMCG config is not enabled. That config is usually enabled for
the generic Ubuntu kernel. However, the config is disabled by the
following patch in the 5.15 real-time patch set:
[PATCH 098/167] mm/memcontrol: Disable on PREEMPT_RT
I don't see this patch in the 5.16 and newer patch sets. Is there a fix
in mainline or in the newer 5.16 patches that allows the 'mm/memcontrol:
Disable on PREEMPT_RT' patch to be dropped? If so, I could assist with
backporting the fix to 5.15 and older.
Thanks in advance!
Joe
[0] https://bugs.launchpad.net/ubuntu-realtime/+bug/1978814
