Commit fcdb1eda authored by Josh Don's avatar Josh Don Committed by Tejun Heo
Browse files

cgroup: fix display of forceidle time at root 



We need to reset forceidle_sum to 0 when reading from root, since the
bstat we accumulate into is stack allocated.

To make this more robust, just replace the existing cputime reset with a
memset of the overall bstat.

Signed-off-by: default avatarJosh Don <joshdon@google.com>
Fixes: 1fcf54de ("sched/core: add forced idle accounting for cgroups")
Cc: stable@vger.kernel.org # v6.0+
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 8d3c682a

kernel/cgroup/rstat.c

+1 −3
Original line number Diff line number Diff line
@@ -457,9 +457,7 @@ static void root_cgroup_cputime(struct cgroup_base_stat *bstat) 
	struct task_cputime *cputime = &bstat->cputime;

	int i;



	cputime->stime = 0;

	cputime->utime = 0;

	cputime->sum_exec_runtime = 0;

	memset(bstat, 0, sizeof(*bstat));

	for_each_possible_cpu(i) {

		struct kernel_cpustat kcpustat;

		u64 *cpustat = kcpustat.cpustat;