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From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Wed, 4 May 2011 18:40:49 -0700
Message-ID: <BANLkTi=gtiZU3W+UfkgaygURtVWNE6qyEw@mail.gmail.com>
Subject: Re: [PATCH] mm: fix possible cause of a page_mapped BUG
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Sender: owner-linux-mm@kvack.org
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To: Michel Lespinasse <walken@google.com>
Cc: =?UTF-8?B?Um9iZXJ0IMWad2nEmWNraQ==?= <robert@swiecki.net>, Hugh Dickins <hughd@google.com>, Andrew Morton <akpm@linux-foundation.org>, Miklos Szeredi <miklos@szeredi.hu>, "Eric W. Biederman" <ebiederm@xmission.com>, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Peter Zijlstra <a.p.zijlstra@chello.nl>, Rik van Riel <riel@redhat.com>

On Wed, May 4, 2011 at 6:18 PM, Michel Lespinasse <walken@google.com> wrote:
>
> I think we want the mm/memory.c part of this proposal without the
> mm/mlock.c part.

.. but what about mlock not setting the FOLL_MLOCK bit, then?

In that case, you'd get the "mlock extends the stack" problem.

                         Linus

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