linux-kernel - Re: [PATCH] trace: use __this_cpu_inc/dec operation instead of __get_cpu

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Message-ID: <0000013b1a987395-2afa8715-e3f8-4bd1-8f56-6a8073da757b-000000@email.amazonses.com>
Date:	Mon, 19 Nov 2012 21:34:57 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Shan Wei <shanwei88@...il.com>
cc:	rostedt@...dmis.org, fweisbec@...il.com, mingo@...hat.com,
	Kernel-Maillist <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] trace: use __this_cpu_inc/dec operation instead of
 __get_cpu_var

On Mon, 19 Nov 2012, Shan Wei wrote:

> __this_cpu_inc_return() or __this_cpu_dec generates a single instruction,
> which is faster than __get_cpu_var operation.

Reviewed-by: Christoph Lameter <cl@...ux.com>
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