linux-kernel - Re: [patch 12/12] mm: correctly synchronize rss-counters at exit/exec

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Date:	Fri, 8 Jun 2012 03:05:20 +0200
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	akpm@...ux-foundation.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>, khlebnikov@...nvz.org,
	hughd@...gle.com, kamezawa.hiroyu@...fujitsu.com, oleg@...hat.com,
	stable@...r.kernel.org
Subject: Re: [patch 12/12] mm: correctly synchronize rss-counters at exit/exec

On 2012.06.07 at 17:25 -0700, Linus Torvalds wrote:
> Ugh, looking more at the patch, I'm getting more and more convinces
> that it is pure and utter garbage.
> 
> It does "sync_mm_rss(mm);" in mmput(), _after_ it has done the
> possibly final mmdrop(). WTF?
> 
> This is crap, guys. Seriously. Stop playing russian rulette with this
> code. I think we need to revert *all* of the crazy rss games, unless
> Konstantin can show us some truly obviously correct fix.
> 
> Sadly, I merged and pushed out the crap before I had rebooted and
> noticed this problem, so now it's in the wild. Can somebody please
> take a look at this asap?

You've somehow merged the wrong patch.
The correct version can be found here:
http://marc.info/?l=linux-kernel&m=133848759505805

-- 
Markus
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