From: Johannes Weiner <hannes@cmpxchg.org>
To: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@suse.cz>,
David Rientjes <rientjes@google.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
azurIt <azurit@pobox.sk>,
linux-mm@kvack.org, cgroups@vger.kernel.org, x86@kernel.org,
linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [patch 2/6] arch: mm: do not invoke OOM killer on kernel fault OOM
Date: Thu, 1 Aug 2013 17:59:24 -0400 [thread overview]
Message-ID: <20130801215924.GO715@cmpxchg.org> (raw)
In-Reply-To: <51F6BB3D.6000700@gmail.com>
On Mon, Jul 29, 2013 at 02:58:05PM -0400, KOSAKI Motohiro wrote:
> (7/25/13 6:25 PM), Johannes Weiner wrote:
> > Kernel faults are expected to handle OOM conditions gracefully (gup,
> > uaccess etc.), so they should never invoke the OOM killer. Reserve
> > this for faults triggered in user context when it is the only option.
> >
> > Most architectures already do this, fix up the remaining few.
> >
> > Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
>
> OK. but now almost all arch have the same page fault handler. So, I think
> we can implement arch generic page fault handler in future. Ah, ok, never
> mind if you are not interest.
Well, I'm already working towards it ;-) Still a long way to go,
though to fully replace them with generic code...
> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Thanks!
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2013-08-01 21:59 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-25 22:25 [patch 0/6] improve memcg oom killer robustness Johannes Weiner
2013-07-25 22:25 ` [patch 1/6] arch: mm: remove obsolete init OOM protection Johannes Weiner
2013-07-26 13:00 ` Michal Hocko
2013-07-29 18:55 ` KOSAKI Motohiro
2013-07-25 22:25 ` [patch 2/6] arch: mm: do not invoke OOM killer on kernel fault OOM Johannes Weiner
2013-07-26 13:07 ` Michal Hocko
2013-07-29 18:58 ` KOSAKI Motohiro
2013-08-01 21:59 ` Johannes Weiner [this message]
2013-07-25 22:25 ` [patch 3/6] arch: mm: pass userspace fault flag to generic fault handler Johannes Weiner
2013-07-26 13:19 ` Michal Hocko
2013-07-26 18:45 ` Johannes Weiner
2013-07-25 22:25 ` [patch 4/6] x86: finish user fault error path with fatal signal Johannes Weiner
2013-07-26 13:52 ` Michal Hocko
2013-07-26 18:46 ` Johannes Weiner
2013-07-29 12:45 ` Michal Hocko
2013-07-29 19:01 ` KOSAKI Motohiro
2013-07-25 22:25 ` [patch 5/6] mm: memcg: enable memcg OOM killer only for user faults Johannes Weiner
2013-07-26 14:16 ` Michal Hocko
2013-07-26 18:54 ` Johannes Weiner
2013-07-29 19:18 ` KOSAKI Motohiro
2013-07-29 19:44 ` Johannes Weiner
2013-07-29 19:47 ` KOSAKI Motohiro
2013-07-25 22:25 ` [patch 6/6] mm: memcg: do not trap chargers with full callstack on OOM Johannes Weiner
2013-07-26 14:43 ` Michal Hocko
2013-07-26 21:28 ` Johannes Weiner
2013-07-29 14:12 ` Michal Hocko
2013-07-29 14:55 ` Johannes Weiner
2013-07-29 15:52 ` Michal Hocko
2013-07-30 14:09 ` Michal Hocko
2013-07-30 14:32 ` Johannes Weiner
2013-07-30 14:56 ` Michal Hocko
2013-07-25 22:31 ` [patch 3.2] memcg OOM robustness (x86 only) Johannes Weiner
2013-08-03 8:38 ` azurIt
2013-08-03 16:30 ` Johannes Weiner
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=20130801215924.GO715@cmpxchg.org \
--to=hannes@cmpxchg.org \
--cc=akpm@linux-foundation.org \
--cc=azurit@pobox.sk \
--cc=cgroups@vger.kernel.org \
--cc=kamezawa.hiroyu@jp.fujitsu.com \
--cc=kosaki.motohiro@gmail.com \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mhocko@suse.cz \
--cc=rientjes@google.com \
--cc=x86@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