Re: slub: Do not use 192 byte sized cache if minimum alignment is 128 byte

From: Pekka Enberg
Date: Thu Jul 03 2008 - 11:38:12 EST


On Thu, Jul 3, 2008 at 5:14 PM, Christoph Lameter
<cl@xxxxxxxxxxxxxxxxxxxx> wrote:
> The 192 byte cache is not necessary if we have a basic alignment of 128
> byte. If it would be used then the 192 would be aligned to the next 128 byte
> boundary which would result in another 256 byte cache. Two 256 kmalloc caches
> cause sysfs to complain about a duplicate entry.
>
> MIPS needs 128 byte aligned kmalloc caches and spits out warnings on boot without
> this patch.
>
> Signed-off-by: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>

Looks good to me. Yoichi, did you have the chance to test this?
Christoph, are the warnings harmless or do we need to get this into
2.6.26?
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