From: Oleg Nesterov <oleg@redhat.com>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: rientjes@google.com, akpm@linux-foundation.org,
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, yinghan@google.com
Subject: Re: mm->oom_disable_count is broken
Date: Mon, 29 Aug 2011 20:37:43 +0200 [thread overview]
Message-ID: <20110829183743.GA15216@redhat.com> (raw)
In-Reply-To: <4E369372.80105@jp.fujitsu.com>
On 08/01, KOSAKI Motohiro wrote:
>
> > And this reminds me. mm->oom_disable_count looks absolutely broken.
> > IIRC, I already complained but nobody replied.
> >
> > [...snip...]
>
> IIRC, I did pointed out this issue. But nobody replied.
> I think ->oom_disable_count is currently broken. but now I have no time to
> audit this stuff. So, I'd suggest to revert this code if nobody don't fix it.
I tend to agree, of course we can fix oom_disable_count but I don't
really understand why do we want it.
David, could you please explain? I mean, CLONE_VM (without CLONE_THREAD)
is not that common, I think. Does this counter really help in practice?
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?
Oleg.
next prev parent reply other threads:[~2011-08-29 18:42 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 [this message]
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 ` mm->oom_disable_count is broken Oleg Nesterov
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
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=20110829183743.GA15216@redhat.com \
--to=oleg@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=avagin@openvz.org \
--cc=dvlasenk@redhat.com \
--cc=fhrbata@redhat.com \
--cc=kosaki.motohiro@jp.fujitsu.com \
--cc=linux-kernel@vger.kernel.org \
--cc=matt.fleming@linux.intel.com \
--cc=rientjes@google.com \
--cc=roland@hack.frob.com \
--cc=tj@kernel.org \
--cc=torvalds@linux-foundation.org \
--cc=yinghan@google.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.