From: Josh Don <joshdon@google.com>
To: Tejun Heo <tj@kernel.org>, Zefan Li <lizefan.x@bytedance.com>,
Johannes Weiner <hannes@cmpxchg.org>
Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
Josh Don <joshdon@google.com>
Subject: [PATCH] cgroup: fix display of forceidle time at root
Date: Wed, 15 Mar 2023 14:40:29 -0700 [thread overview]
Message-ID: <20230315214029.899573-1-joshdon@google.com> (raw)
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>
---
kernel/cgroup/rstat.c | 4 +---
1 file changed, 1 insertion(+), 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;
--
2.40.0.rc1.284.g88254d51c5-goog
next reply other threads:[~2023-03-15 21:40 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-15 21:40 Josh Don [this message]
2023-03-16 2:19 ` [PATCH] cgroup: fix display of forceidle time at root Waiman Long
2023-03-16 18:52 ` Josh Don
2023-03-17 22:20 ` Tejun Heo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20230315214029.899573-1-joshdon@google.com \
--to=joshdon@google.com \
--cc=cgroups@vger.kernel.org \
--cc=hannes@cmpxchg.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lizefan.x@bytedance.com \
--cc=tj@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox