diff options
| author | Boris Burkov <boris@bur.io> | 2020-05-27 14:43:19 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2020-05-28 10:06:35 -0400 |
| commit | 936f2a70f2077f64fab1dcb3eca71879e82ecd3f (patch) | |
| tree | 7a649b1c8e4776ddbada58db00a69b56b9433942 /kernel/cgroup/cgroup.c | |
| parent | 6b6ebb34744b21467aa01be7c53cc570fc41f70d (diff) | |
cgroup: add cpu.stat file to root cgroup
Currently, the root cgroup does not have a cpu.stat file. Add one which
is consistent with /proc/stat to capture global cpu statistics that
might not fall under cgroup accounting.
We haven't done this in the past because the data are already presented
in /proc/stat and we didn't want to add overhead from collecting root
cgroup stats when cgroups are configured, but no cgroups have been
created.
By keeping the data consistent with /proc/stat, I think we avoid the
first problem, while improving the usability of cgroups stats.
We avoid the second problem by computing the contents of cpu.stat from
existing data collected for /proc/stat anyway.
Signed-off-by: Boris Burkov <boris@bur.io>
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/cgroup/cgroup.c')
| -rw-r--r-- | kernel/cgroup/cgroup.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 7a016749de21..51924ebdff51 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -4874,7 +4874,6 @@ static struct cftype cgroup_base_files[] = { }, { .name = "cpu.stat", - .flags = CFTYPE_NOT_ON_ROOT, .seq_show = cpu_stat_show, }, #ifdef CONFIG_PSI |