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authorJosh Don <joshdon@google.com>2023-03-15 14:40:29 -0700
committerTejun Heo <tj@kernel.org>2023-03-17 12:19:15 -1000
commitfcdb1eda5302599045bb366e679cccb4216f3873 (patch)
treedb8f154b993c6f51a90eb649af55435bf9b373c4 /kernel/cgroup
parent8d3c682a5e3d9dfc2448ecbb22f4cd48359b9e21 (diff)
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: Josh Don <joshdon@google.com> Fixes: 1fcf54deb767 ("sched/core: add forced idle accounting for cgroups") Cc: stable@vger.kernel.org # v6.0+ Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/cgroup')
-rw-r--r--kernel/cgroup/rstat.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/kernel/cgroup/rstat.c b/kernel/cgroup/rstat.c
index 831f1f472bb8..0a2b4967e333 100644
--- a/kernel/cgroup/rstat.c
+++ b/kernel/cgroup/rstat.c
@@ -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;