linux-kernel - Re: a whole bunch of crashes since todays -mm merge.

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Message-ID: <CA+55aFxwVWiVwxj39DoJmMTknh7JKvCxzxyu-cMQZwd53jOmgQ@mail.gmail.com>
Date:	Thu, 7 Jun 2012 18:06:27 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Dave Jones <davej@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Subject: Re: a whole bunch of crashes since todays -mm merge.

On Thu, Jun 7, 2012 at 6:00 PM, Dave Jones <davej@...hat.com> wrote:
>
> Or I might just be getting lucky..

Do you have SPLIT_RSS_COUNTING enabled?

Do you see multiple "BUG: Bad rss-counter state" messages?

The sync_mm_rss() thing could basically overwrite an already-free'd
piece of memory, so it could cause pretty random stuff. But I think
you need to be unlucky to hit the window.

                Linus
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