linux-kernel - Re: [PATCH] cleancache: use __read_mostly for cleancache

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Message-ID: <BANLkTikX+dKsdwGOxG10Q2LVd_rCxEBRHw@mail.gmail.com>
Date:	Mon, 30 May 2011 09:35:29 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	Cesar Eduardo Barros <cesarb@...arb.net>
Cc:	linux-mm@...ck.org, Jan Beulich <JBeulich@...ell.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andreas Dilger <adilger@....com>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cleancache: use __read_mostly for cleancache_enabled

On Mon, May 30, 2011 at 5:38 AM, Cesar Eduardo Barros <cesarb@...arb.net> wrote:
> The global variable cleancache_enabled is read often but written to
> rarely. Use __read_mostly to prevent it being on the same cacheline as
> another variable which is written to often, which would cause cacheline
> bouncing.
>
> Signed-off-by: Cesar Eduardo Barros <cesarb@...arb.net>
Reviewed-by: Minchan Kim <minchan.kim@...il.com>


-- 
Kind regards,
Minchan Kim
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