From: David Rientjes <rientjes@google.com>
To: Rodrigo Freire <rfreire@redhat.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: be more informative in OOM task list
Date: Tue, 3 Jul 2018 18:34:48 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.21.1807031832540.110853@chino.kir.corp.google.com> (raw)
In-Reply-To: <7de14c6cac4a486c04149f37948e3a76028f3fa5.1530461087.git.rfreire@redhat.com>
On Sun, 1 Jul 2018, Rodrigo Freire wrote:
> The default page memory unit of OOM task dump events might not be
> intuitive for the non-initiated when debugging OOM events. Add
> a small printk prior to the task dump informing that the memory
> units are actually memory _pages_.
>
> Signed-off-by: Rodrigo Freire <rfreire@redhat.com>
> ---
> mm/oom_kill.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/mm/oom_kill.c b/mm/oom_kill.c
> index 84081e7..b4d9557 100644
> --- a/mm/oom_kill.c
> +++ b/mm/oom_kill.c
> @@ -392,6 +392,7 @@ static void dump_tasks(struct mem_cgroup *memcg, const nodemask_t *nodemask)
> struct task_struct *p;
> struct task_struct *task;
>
> + pr_info("Tasks state (memory values in pages):\n");
> pr_info("[ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name\n");
> rcu_read_lock();
> for_each_process(p) {
As the author of dump_tasks(), and having seen these values misinterpreted
on more than one occassion, I think this is a valuable addition.
Could you also expand out the "pid" field to allow for seven digits
instead of five? I think everything else is aligned.
Feel free to add
Acked-by: David Rientjes <rientjes@google.com>
to a v2.
next prev parent reply other threads:[~2018-07-04 1:34 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-01 16:09 [PATCH] mm: be more informative in OOM task list Rodrigo Freire
2018-07-02 9:30 ` Michal Hocko
2018-07-02 11:22 ` Rodrigo Freire
2018-07-02 11:29 ` Michal Hocko
2018-07-02 11:39 ` Rodrigo Freire
2018-07-04 1:34 ` David Rientjes [this message]
2018-07-04 14:36 ` Rafael Aquini
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=alpine.DEB.2.21.1807031832540.110853@chino.kir.corp.google.com \
--to=rientjes@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=rfreire@redhat.com \
/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;
as well as URLs for NNTP newsgroup(s).