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(parent: 822bc9b) | patch
cgroup: Fix rootcg cpu.stat guest double counting
authorDan Schatzberg <schatzberg.dan@gmail.com>
Thu, 28 Oct 2021 22:15:27 +0000 (15:15 -0700)
committerTejun Heo <tj@kernel.org>
Mon, 1 Nov 2021 16:47:08 +0000 (06:47 -1000)
commit81c49d39aea8a10e6d05d3aa1cb65ceb721e19b0
tree9fae7adcc55b83b9ce6d753ce75dc024c646e797tree | snapshot
parent822bc9bac9e9a2f76a772a34f745962dfc223353commit | diff
cgroup: Fix rootcg cpu.stat guest double counting

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 <schatzberg.dan@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
kernel/cgroup/rstat.c diff | blob | history
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