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Date: Sun, 2 Dec 2012 16:10:48 +0100
From: Ingo Molnar <mingo@kernel.org>
Subject: Re: [PATCH 1/2] mm/rmap: Convert the struct anon_vma::mutex to an
 rwsem
Message-ID: <20121202151048.GA12911@gmail.com>
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To: Rik van Riel <riel@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, linux-mm <linux-mm@kvack.org>, Peter Zijlstra <a.p.zijlstra@chello.nl>, Paul Turner <pjt@google.com>, Lee Schermerhorn <Lee.Schermerhorn@hp.com>, Christoph Lameter <cl@linux.com>, Mel Gorman <mgorman@suse.de>, Andrew Morton <akpm@linux-foundation.org>, Andrea Arcangeli <aarcange@redhat.com>, Thomas Gleixner <tglx@linutronix.de>, Johannes Weiner <hannes@cmpxchg.org>, Hugh Dickins <hughd@google.com>


* Rik van Riel <riel@redhat.com> wrote:

> On 12/01/2012 03:10 PM, Ingo Molnar wrote:
> >
> >Convert the struct anon_vma::mutex to an rwsem, which will help
> >in solving a page-migration scalability problem. (Addressed in
> >a separate patch.)
> >
> >The conversion is simple and straightforward: in every case
> >where we mutex_lock()ed we'll now down_write().
> >
> >Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
> >Cc: Andrew Morton <akpm@linux-foundation.org>
> >Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
> >Cc: Andrea Arcangeli <aarcange@redhat.com>
> >Cc: Rik van Riel <riel@redhat.com>
> >Cc: Mel Gorman <mgorman@suse.de>
> >Cc: Hugh Dickins <hughd@google.com>
> >Signed-off-by: Ingo Molnar <mingo@kernel.org>
> 
> Reviewed-by: Rik van Riel <riel@redhat.com>

Thanks Rik!

	Ingo

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