This is a note to let you know that I've just added the patch titled
cgroup: fix display of forceidle time at root
to the 6.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cgroup-fix-display-of-forceidle-time-at-root.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fcdb1eda5302599045bb366e679cccb4216f3873 Mon Sep 17 00:00:00 2001
From: Josh Don <joshdon@xxxxxxxxxx>
Date: Wed, 15 Mar 2023 14:40:29 -0700
Subject: cgroup: fix display of forceidle time at root
From: Josh Don <joshdon@xxxxxxxxxx>
commit fcdb1eda5302599045bb366e679cccb4216f3873 upstream.
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@xxxxxxxxxx>
Fixes: 1fcf54deb767 ("sched/core: add forced idle accounting for cgroups")
Cc: stable@xxxxxxxxxxxxxxx # v6.0+
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/cgroup/rstat.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/kernel/cgroup/rstat.c
+++ b/kernel/cgroup/rstat.c
@@ -457,9 +457,7 @@ static void root_cgroup_cputime(struct c
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;
Patches currently in stable-queue which might be from joshdon@xxxxxxxxxx are
queue-6.2/cgroup-fix-display-of-forceidle-time-at-root.patch
