linux-kernel - Re: [PATCH] mm: fix possible cause of a page

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Message-ID: <BANLkTikdM2kF=qOy4d4bZ_wfb5ykEdkZPQ@mail.gmail.com>
Date:	Tue, 12 Apr 2011 21:02:57 +0200
From:	Robert Święcki <robert@...ecki.net>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Hugh Dickins <hughd@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Miklos Szeredi <miklos@...redi.hu>,
	Michel Lespinasse <walken@...gle.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Rik van Riel <riel@...hat.com>
Subject: Re: [PATCH] mm: fix possible cause of a page_mapped BUG

On Tue, Apr 12, 2011 at 8:59 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
> On Tue, Apr 12, 2011 at 10:19 AM, Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
>>
>> THIS IS A HACKY AND UNTESTED PATCH!
>
> .. and here is a rather less hacky, but still equally untested patch.
> It moves the stack guard page handling into __get_user_pages() itself,
> and thus avoids the whole problem.
>
> This one I could easily see myself committing. Assuming I get some
> ack's and testing..

I'm testing currently with the old one, w/o any symptoms of problems
by now, but it's not a meaningful period of time. I can try with the
new one, leave it over(European)night, and let you know tomorrow.

-- 
Robert Święcki
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