Re: [PATCH] x86: change the default cache size to 64 bytes

[Arjan van de Ven]

On Mon, 12 Jan 2009 23:44:28 +0100
Ingo Molnar <mingo@xxxxxxx> wrote:

> >From 632c5045d6827a3d044b6eb216d0e5597b25d468 Mon Sep 17 00:00:00
> >2001
> From: Ingo Molnar <mingo@xxxxxxx>
> Date: Mon, 12 Jan 2009 23:37:16 +0100
> Subject: [PATCH] x86: change the default cache size to 64 bytes
> 
> Right now the generic cacheline size is 128 bytes - that is wasteful
> when structures are aligned, as all modern x86 CPUs have an
> (effective) cacheline sizes of 64 bytes.
> 
> It was set to 128 bytes due to some cacheline aliasing problems on
> older P4 systems, but those are many years old and we dont optimize
> for them anymore. (They'll still get the 128 bytes cacheline size if
> the kernel is specifically built for Pentium 4)
> 
> Signed-off-by: Ingo Molnar <mingo@xxxxxxx>

Acked-by: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
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