From: Michal Hocko <mhocko@kernel.org>
To: David Rientjes <rientjes@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>,
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
Oleg Nesterov <oleg@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Hugh Dickins <hughd@google.com>,
Andrea Argangeli <andrea@kernel.org>,
Rik van Riel <riel@redhat.com>,
linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 4/5] mm, oom_reaper: report success/failure
Date: Thu, 4 Feb 2016 07:46:37 +0100 [thread overview]
Message-ID: <20160204064636.GD8581@dhcp22.suse.cz> (raw)
In-Reply-To: <alpine.DEB.2.10.1602031505210.10331@chino.kir.corp.google.com>
On Wed 03-02-16 15:10:57, David Rientjes wrote:
> On Wed, 3 Feb 2016, Michal Hocko wrote:
>
> > diff --git a/mm/oom_kill.c b/mm/oom_kill.c
> > index 8e345126d73e..b87acdca2a41 100644
> > --- a/mm/oom_kill.c
> > +++ b/mm/oom_kill.c
> > @@ -420,6 +420,7 @@ static struct task_struct *oom_reaper_th;
> > static struct task_struct *task_to_reap;
> > static DECLARE_WAIT_QUEUE_HEAD(oom_reaper_wait);
> >
> > +#define K(x) ((x) << (PAGE_SHIFT-10))
> > static bool __oom_reap_task(struct task_struct *tsk)
> > {
> > struct mmu_gather tlb;
> > @@ -476,6 +477,11 @@ static bool __oom_reap_task(struct task_struct *tsk)
> > }
> > }
> > tlb_finish_mmu(&tlb, 0, -1);
> > + pr_info("oom_reaper: reaped process :%d (%s) anon-rss:%lukB, file-rss:%lukB, shmem-rss:%lulB\n",
> > + task_pid_nr(tsk), tsk->comm,
> > + K(get_mm_counter(mm, MM_ANONPAGES)),
> > + K(get_mm_counter(mm, MM_FILEPAGES)),
> > + K(get_mm_counter(mm, MM_SHMEMPAGES)));
> > up_read(&mm->mmap_sem);
> >
> > /*
>
> This is a bit misleading, it would appear that the rss values are what was
> reaped when in fact they represent just the values of the mm being reaped.
> We have already printed these values as an artifact in the kernel log.
Yes and the idea was to provide the after state to compare before and
after. That's why I have kept the similar format. Just dropped the
virtual memory size because that doesn't make any sense in this context
now.
> I think it would be helpful to show anon-rss after reaping, however, so we
> can compare to the previous anon-rss that was reported. And, I agree that
> leaving behind a message in the kernel log that reaping has been
> successful is worthwhile. So this line should just show what anon-rss is
> after reaping and make it clear that this is not the memory reaped.
Does
"oom_reaper: reaped process %d (%s) current memory anon-rss:%lukB, file-rss:%lukB, shmem-rss:%lukB "
sound any better?
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2016-02-04 6:46 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-03 13:13 [PATCH 0/5] oom reaper v5 Michal Hocko
2016-02-03 13:13 ` [PATCH 1/5] mm, oom: introduce oom reaper Michal Hocko
2016-02-03 23:48 ` David Rientjes
2016-02-04 6:41 ` Michal Hocko
2016-02-06 13:22 ` Tetsuo Handa
2016-02-15 20:50 ` Michal Hocko
2016-02-03 13:13 ` [PATCH 2/5] oom reaper: handle mlocked pages Michal Hocko
2016-02-03 23:57 ` David Rientjes
2016-02-23 1:36 ` David Rientjes
2016-02-23 13:21 ` Michal Hocko
2016-02-29 3:19 ` Hugh Dickins
2016-02-29 13:41 ` Michal Hocko
2016-03-08 13:40 ` Michal Hocko
2016-03-08 20:07 ` Hugh Dickins
2016-03-09 8:26 ` Michal Hocko
2016-02-03 13:13 ` [PATCH 3/5] oom: clear TIF_MEMDIE after oom_reaper managed to unmap the address space Michal Hocko
2016-02-04 14:22 ` Tetsuo Handa
2016-02-04 14:43 ` Michal Hocko
2016-02-04 15:08 ` Tetsuo Handa
2016-02-04 16:31 ` Michal Hocko
2016-02-05 11:14 ` Tetsuo Handa
2016-02-06 8:30 ` Michal Hocko
2016-02-06 11:23 ` Tetsuo Handa
2016-02-15 20:47 ` Michal Hocko
2016-02-06 6:45 ` Michal Hocko
2016-02-06 14:33 ` Tetsuo Handa
2016-02-15 20:40 ` [PATCH 3.1/5] oom: make oom_reaper freezable Michal Hocko
2016-02-03 13:13 ` [PATCH 4/5] mm, oom_reaper: report success/failure Michal Hocko
2016-02-03 23:10 ` David Rientjes
2016-02-04 6:46 ` Michal Hocko [this message]
2016-02-04 22:31 ` David Rientjes
2016-02-05 9:26 ` Michal Hocko
2016-02-06 6:34 ` Michal Hocko
2016-02-03 13:14 ` [PATCH 5/5] mm, oom_reaper: implement OOM victims queuing Michal Hocko
2016-02-04 10:49 ` Tetsuo Handa
2016-02-04 14:53 ` Michal Hocko
2016-02-06 5:54 ` Tetsuo Handa
2016-02-06 8:37 ` Michal Hocko
2016-02-06 15:33 ` Tetsuo Handa
2016-02-15 20:15 ` Michal Hocko
2016-02-16 11:11 ` Tetsuo Handa
2016-02-16 15:53 ` Michal Hocko
2016-02-17 9:48 ` [PATCH 6/5] oom, oom_reaper: disable oom_reaper for Michal Hocko
2016-02-17 10:41 ` Tetsuo Handa
2016-02-17 11:33 ` Michal Hocko
2016-02-19 18:34 ` Michal Hocko
2016-02-20 2:32 ` [PATCH 6/5] oom, oom_reaper: disable oom_reaper for oom_kill_allocating_task Tetsuo Handa
2016-02-22 9:41 ` Michal Hocko
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