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xen-devel
[Xen-devel] Re: [PATCH 1/3] mm: Optimize pfn calculation in online_page(
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To: |
Daniel Kiper <dkiper@xxxxxxxxxxxx> |
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Subject: |
[Xen-devel] Re: [PATCH 1/3] mm: Optimize pfn calculation in online_page() |
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From: |
Dave Hansen <dave@xxxxxxxxxxxxxxxxxx> |
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Date: |
Mon, 28 Mar 2011 08:24:13 -0700 |
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Cc: |
jeremy@xxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, ian.campbell@xxxxxxxxxx, haicheng.li@xxxxxxxxxxxxxxx, konrad.wilk@xxxxxxxxxx, dan.magenheimer@xxxxxxxxxx, v.tolstov@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, rientjes@xxxxxxxxxx, andi.kleen@xxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, fengguang.wu@xxxxxxxxx, wdauchy@xxxxxxxxx |
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Mon, 28 Mar 2011 08:25:35 -0700 |
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<20110328092310.GB13826@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> |
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On Mon, 2011-03-28 at 11:23 +0200, 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@xxxxxxxxxxxx>
Looks sensible to me.
Acked-by: Dave Hansen <dave@xxxxxxxxxxxxxxxxxx
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