On Thu, Oct 28, 2021 at 03:15:27PM -0700, Dan Schatzberg wrote:

In account_guest_time in kernel/sched/cputime.c guest time is
attributed to both CPUTIME_NICE and CPUTIME_USER in addition to
CPUTIME_GUEST_NICE and CPUTIME_GUEST respectively. Therefore, adding
both to calculate usage results in double counting any guest time at
the rootcg.

Fixes: 936f2a70f207 ("cgroup: add cpu.stat file to root cgroup")
Signed-off-by: Dan Schatzberg <redacted>

Applying to cgroup/for-5.16.

Thanks.

-- 
tejun