From: Michal Hocko <mhocko@kernel.org>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
rientjes@google.com, linux-mm@kvack.org
Subject: Re: [PATCH v3] mm,oom: speed up select_bad_process() loop.
Date: Fri, 20 May 2016 08:42:44 +0200 [thread overview]
Message-ID: <20160520064244.GD19172@dhcp22.suse.cz> (raw)
In-Reply-To: <20160520015000.GA20132@redhat.com>
On Fri 20-05-16 03:50:01, Oleg Nesterov wrote:
> On 05/19, Michal Hocko wrote:
> >
> > Long term I
> > would like to to move this logic into the mm_struct, it would be just
> > larger surgery I guess.
>
> Why we can't do this right now? Just another MMF_ flag set only once and
> never cleared.
It is more complicated and so more error prone. We have to sort out
shortcuts which get TIF_MEMDIE without killing first. And we have that
nasty "mm shared between independant processes" case there. I definitely
want to get to this after the merge window but the oom pile in the
Andrew's tree is quite large already. So this patch seems like a good
start to build on top.
If you feel that this step is not really worth it I can accept it of
course, this is an area where we do not have to hurry.
--
Michal Hocko
SUSE Labs
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next prev parent reply other threads:[~2016-05-20 6:42 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-18 12:20 [PATCH v2] mm,oom: speed up select_bad_process() loop Tetsuo Handa
2016-05-18 12:51 ` Michal Hocko
2016-05-18 13:30 ` [PATCH v3] " Tetsuo Handa
2016-05-18 14:15 ` Michal Hocko
2016-05-18 21:09 ` Andrew Morton
2016-05-19 6:53 ` Michal Hocko
2016-05-19 7:17 ` Michal Hocko
2016-05-19 8:17 ` Michal Hocko
2016-05-20 1:50 ` Oleg Nesterov
2016-05-20 2:13 ` Oleg Nesterov
2016-05-20 6:42 ` Michal Hocko [this message]
2016-05-20 22:04 ` Oleg Nesterov
2016-05-18 14:44 ` Tetsuo Handa
2016-05-20 7:50 ` Michal Hocko
2016-05-20 11:51 ` Tetsuo Handa
2016-05-20 12:09 ` Michal Hocko
2016-05-20 13:41 ` Tetsuo Handa
2016-05-20 13:44 ` Tetsuo Handa
2016-05-20 15:23 ` Michal Hocko
2016-05-20 15:56 ` Tetsuo Handa
2016-05-23 7:55 ` Michal Hocko
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