From: Oleg Nesterov <oleg@redhat.com>
To: David Rientjes <rientjes@google.com>
Cc: Ying Han <yinghan@google.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
roland@hack.frob.com, tj@kernel.org, dvlasenk@redhat.com,
matt.fleming@linux.intel.com, linux-kernel@vger.kernel.org,
avagin@openvz.org, fhrbata@redhat.com
Subject: Re: mm->oom_disable_count is broken
Date: Tue, 30 Aug 2011 18:17:43 +0200 [thread overview]
Message-ID: <20110830161743.GC22754@redhat.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1108291611070.32495@chino.kir.corp.google.com>
On 08/29, David Rientjes wrote:
>
> On Mon, 29 Aug 2011, Oleg Nesterov wrote:
>
> > And. personally I dislike it because ->oom_disable_count is just another
> > proof that ->oom_score_adj should be in ->mm, not per-process. IIRC,
> > you already explained me why we can't do this, but - sorry - I forgot.
> > May be something with vfork... Could you explain this again?
>
> I actually really wanted oom_score_adj to be in the ->mm, it would
> simplify a lot of the code :) The problem was the inheritance property:
> we expect a job scheduler that is OOM_DISABLE to be able to vfork, change
> the oom_score_adj of the child, and then exec so that it is not oom
> disabled before starting to allocate memory.
Ah, I see. Thanks.
And yes, now I recall this is what you already explained ;)
Damn.
Oleg.
next prev parent reply other threads:[~2011-08-30 16:21 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-27 16:31 [PATCH 0/8] make vfork killable/restartable/traceable Oleg Nesterov
2011-07-27 16:32 ` [PATCH 1/8] vfork: introduce complete_vfork_done() Oleg Nesterov
2011-07-27 16:32 ` [PATCH 2/8] vfork: introduce clone_vfork_finish() Oleg Nesterov
2011-07-27 16:32 ` [PATCH 3/8] vfork: make it killable Oleg Nesterov
2011-07-29 13:02 ` Matt Fleming
2011-07-29 14:32 ` Oleg Nesterov
2011-07-29 15:32 ` Matt Fleming
2011-07-27 16:33 ` [PATCH 4/8] coredump_wait: don't call complete_vfork_done() Oleg Nesterov
2011-07-29 13:02 ` Matt Fleming
2011-07-29 14:25 ` Oleg Nesterov
2011-07-29 15:26 ` Matt Fleming
2011-07-27 16:33 ` [PATCH 5/8] introduce find_get_task_by_vpid() Oleg Nesterov
2011-07-27 16:33 ` [PATCH 6/8] vfork: do not setup child->vfork_done beforehand Oleg Nesterov
2011-07-27 16:34 ` [PATCH 7/8] vfork: make it stoppable/traceable Oleg Nesterov
2011-07-27 16:34 ` [PATCH 8/8] vfork: do not block SIG_DFL/SIG_IGN signals is single-threaded Oleg Nesterov
2011-07-27 16:34 ` [PATCH 9/8] kill PF_STARTING Oleg Nesterov
2011-07-27 19:39 ` [PATCH 0/8] make vfork killable/restartable/traceable Linus Torvalds
2011-07-28 13:59 ` Oleg Nesterov
2011-07-28 14:58 ` Oleg Nesterov
2011-07-27 22:38 ` Pedro Alves
2011-07-29 19:23 ` Tejun Heo
2011-08-12 17:55 ` [PATCH v2 0/3] make vfork killable Oleg Nesterov
2011-08-12 17:56 ` [PATCH 1/3] vfork: introduce complete_vfork_done() Oleg Nesterov
2011-08-12 17:56 ` [PATCH 2/3] vfork: make it killable Oleg Nesterov
2011-08-19 20:33 ` Matt Fleming
2011-08-22 13:35 ` Oleg Nesterov
2011-08-12 17:56 ` [PATCH 3/3] coredump_wait: don't call complete_vfork_done() Oleg Nesterov
2011-08-17 7:50 ` Tejun Heo
2011-08-17 15:11 ` Oleg Nesterov
2011-08-12 17:57 ` [PATCH 4/3] kill PF_STARTING Oleg Nesterov
2011-08-17 7:51 ` Tejun Heo
2011-08-13 16:18 ` [PATCH v2 0/3] make vfork killable Tejun Heo
2011-08-15 19:42 ` Oleg Nesterov
2011-08-16 19:42 ` Tejun Heo
2011-08-23 22:01 ` Matt Helsley
2011-08-23 22:12 ` Tejun Heo
[not found] ` <20110727163610.GJ23793@redhat.com>
[not found] ` <20110727175624.GA3950@redhat.com>
[not found] ` <20110728154324.GA22864@redhat.com>
[not found] ` <alpine.DEB.2.00.1107281341060.16093@chino.kir.corp.google.com>
[not found] ` <20110729141431.GA3501@redhat.com>
[not found] ` <20110730143426.GA6061@redhat.com>
2011-07-30 15:22 ` mm->oom_disable_count is broken Oleg Nesterov
2011-08-01 11:52 ` KOSAKI Motohiro
2011-08-29 18:37 ` Oleg Nesterov
2011-08-29 23:17 ` David Rientjes
2011-08-30 7:43 ` [patch 1/2] oom: remove oom_disable_count David Rientjes
2011-08-30 7:43 ` David Rientjes
2011-08-30 7:43 ` [patch 2/2] oom: fix race while temporarily setting current's oom_score_adj David Rientjes
2011-08-30 7:43 ` David Rientjes
2011-08-30 15:57 ` Oleg Nesterov
2011-08-30 15:57 ` Oleg Nesterov
2011-08-30 15:28 ` [patch 1/2] oom: remove oom_disable_count Oleg Nesterov
2011-08-30 15:28 ` Oleg Nesterov
2011-08-30 22:06 ` David Rientjes
2011-08-30 22:06 ` David Rientjes
2011-08-30 16:17 ` Oleg Nesterov [this message]
2011-08-10 21:44 ` [PATCH 0/8] make vfork killable/restartable/traceable Pavel Machek
2011-08-11 16:09 ` Oleg Nesterov
2011-08-11 16:22 ` Tejun Heo
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