linux-kernel - Re: [PATCH 4/7] zram: use atomic operation for stat

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Message-Id: <20140113155814.07ab74c8f77179fc770a8e5f@linux-foundation.org>
Date:	Mon, 13 Jan 2014 15:58:14 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Minchan Kim <minchan@...nel.org>
Cc:	linux-kernel@...r.kernel.org, Nitin Gupta <ngupta@...are.org>,
	Jerome Marchand <jmarchan@...hat.com>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: Re: [PATCH 4/7] zram: use atomic operation for stat

On Mon, 13 Jan 2014 20:18:59 +0900 Minchan Kim <minchan@...nel.org> wrote:

> Some of fields in zram->stats are protected by zram->lock which
> is rather coarse-grained so let's use atomic operation without
> explict locking.

Confused.  The patch didn't remove any locking, so it made the code
slower.

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