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| author | Dan Schatzberg <schatzberg.dan@gmail.com> | 2021-10-29 00:15:27 +0200 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2021-11-01 17:47:08 +0100 |
| commit | 81c49d39aea8a10e6d05d3aa1cb65ceb721e19b0 (patch) | |
| tree | 9fae7adcc55b83b9ce6d753ce75dc024c646e797 /kernel/cgroup | |
| parent | cgroup: no need for cgroup_mutex for /proc/cgroups (diff) | |
| download | linux-81c49d39aea8a10e6d05d3aa1cb65ceb721e19b0.tar.xz linux-81c49d39aea8a10e6d05d3aa1cb65ceb721e19b0.zip | |
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>
Diffstat (limited to 'kernel/cgroup')
| -rw-r--r-- | kernel/cgroup/rstat.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/kernel/cgroup/rstat.c b/kernel/cgroup/rstat.c index b264ab5652ba..1486768f2318 100644 --- a/kernel/cgroup/rstat.c +++ b/kernel/cgroup/rstat.c @@ -433,8 +433,6 @@ static void root_cgroup_cputime(struct task_cputime *cputime) cputime->sum_exec_runtime += user; cputime->sum_exec_runtime += sys; cputime->sum_exec_runtime += cpustat[CPUTIME_STEAL]; - cputime->sum_exec_runtime += cpustat[CPUTIME_GUEST]; - cputime->sum_exec_runtime += cpustat[CPUTIME_GUEST_NICE]; } } |