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Date:	Thu, 3 Jan 2013 15:25:12 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Kent Overstreet <koverstreet@...gle.com>
Cc:	linux-kernel@...r.kernel.org, linux-aio@...ck.org,
	linux-fsdevel@...r.kernel.org, zab@...hat.com, bcrl@...ck.org,
	jmoyer@...hat.com, axboe@...nel.dk, viro@...iv.linux.org.uk,
	tytso@....edu
Subject: Re: [PATCH 20/32] aio: Give shared kioctx fields their own
 cachelines

On Wed, 26 Dec 2012 17:59:59 -0800
Kent Overstreet <koverstreet@...gle.com> wrote:

>  	struct {
> -		struct mutex	ring_lock;
> +		atomic_t	reqs_active;
>  	} ____cacheline_aligned;

Is there a reason why this guy remains aligned on CONFIG_SMP=n?

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