linux-kernel - Re: [PATCH 1/2] mm/rmap: Convert the struct anon

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


* Rik van Riel <riel@...hat.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@...ux-foundation.org>
> >Cc: Andrew Morton <akpm@...ux-foundation.org>
> >Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> >Cc: Andrea Arcangeli <aarcange@...hat.com>
> >Cc: Rik van Riel <riel@...hat.com>
> >Cc: Mel Gorman <mgorman@...e.de>
> >Cc: Hugh Dickins <hughd@...gle.com>
> >Signed-off-by: Ingo Molnar <mingo@...nel.org>
> 
> Reviewed-by: Rik van Riel <riel@...hat.com>

Thanks Rik!

	Ingo
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