From 936f2a70f2077f64fab1dcb3eca71879e82ecd3f Mon Sep 17 00:00:00 2001 From: Boris Burkov Date: Wed, 27 May 2020 14:43:19 -0700 Subject: 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 Suggested-by: Tejun Heo Signed-off-by: Tejun Heo --- kernel/cgroup/cgroup.c | 1 - 1 file changed, 1 deletion(-) (limited to 'kernel/cgroup/cgroup.c') 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 -- cgit