linux-kernel - Re: [PATCH 1/3 for 2.6.38] oom: oom_kill_process: don't set TIF

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Message-ID: <20110315211656.GA28117@redhat.com>
Date:	Tue, 15 Mar 2011 22:16:56 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Hugh Dickins <hughd@...gle.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Andrey Vagin <avagin@...nvz.org>,
	Frantisek Hrbata <fhrbata@...hat.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3 for 2.6.38] oom: oom_kill_process: don't set
	TIF_MEMDIE if !p->mm

On 03/15, David Rientjes wrote:
>
> On Tue, 15 Mar 2011, Oleg Nesterov wrote:
>
> > Confused. I sent the test-case. OK, may be you meant the code in -mm,
> > but I meant the current code.
> >
>
> This entire discussion, and your involvement in it, originated from these
> two patches being merged into -mm:
>
> 	oom-prevent-unnecessary-oom-kills-or-kernel-panics.patch
> 	oom-skip-zombies-when-iterating-tasklist.patch

Yes. This motivated me to look at the current code, and I was unpleasantly
surprised.

> So naturally I'm going to challenge your testcases with the latest -mm.

Sure. And once again, I didn't expect the 2nd problem was fixed, I forgot
about the second patch.

> If you wanted to suggest pushing these to 2.6.38 earlier,

Yes. It was too late for 2.6.38. I thought we have more time before
release.

Oleg.

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