linux-kernel - Re: [PATCH 49/52] mm/rmap: Convert the struct anon

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Message-ID: <CANN689GwAuFcGsH54Ao=MBrAKJda+62XgkiUQ8MsBDgFYtEERw@mail.gmail.com>
Date:	Tue, 4 Dec 2012 06:43:22 -0800
From:	Michel Lespinasse <walken@...gle.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	linux-kernel@...r.kernel.org, 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>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Johannes Weiner <hannes@...xchg.org>,
	Hugh Dickins <hughd@...gle.com>
Subject: Re: [PATCH 49/52] mm/rmap: Convert the struct anon_vma::mutex to an rwsem

On Sun, Dec 2, 2012 at 10:43 AM, Ingo Molnar <mingo@...nel.org> 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().

Looks good.

Reviewed-by: Michel Lespinasse <walken@...gle.com>

-- 
Michel "Walken" Lespinasse
A program is never fully debugged until the last user dies.
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