linux-kernel - Re: [PATCH 1/3] mm: Optimize pfn calculation in online

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Message-ID: <alpine.LNX.2.00.1103290043480.23292@swampdragon.chaosbits.net>
Date:	Tue, 29 Mar 2011 00:44:39 +0200 (CEST)
From:	Jesper Juhl <jj@...osbits.net>
To:	Daniel Kiper <dkiper@...-space.pl>
cc:	ian.campbell@...rix.com, akpm@...ux-foundation.org,
	andi.kleen@...el.com, haicheng.li@...ux.intel.com,
	fengguang.wu@...el.com, jeremy@...p.org, konrad.wilk@...cle.com,
	dan.magenheimer@...cle.com, v.tolstov@...fip.ru, pasik@....fi,
	dave@...ux.vnet.ibm.com, wdauchy@...il.com, rientjes@...gle.com,
	xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH 1/3] mm: Optimize pfn calculation in online_page()

On Mon, 28 Mar 2011, Daniel Kiper wrote:

> If CONFIG_FLATMEM is enabled pfn is calculated in online_page()
> more than once. It is possible to optimize that and use value
> established at beginning of that function.
> 
> Signed-off-by: Daniel Kiper <dkiper@...-space.pl>

This looks sane to me.

Reviewed-by: Jesper Juhl <jj@...osbits.net>


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