Re: [PATCH -mm 3/6] Fix the x86-64 page colouring code to take pgoff into account and use that code as the basis for a generic page colouring code.

Rik van Riel
2012-06-18T16:46:51Z

On 06/18/2012 12:30 PM, Andi Kleen wrote:
> Rik van Riel<riel@redhat.com> writes:
>
>> From: Rik van Riel<riel@surriel.com>
>>
>> Teach the generic arch_get_unmapped_area(_topdown) code to call the
>> page colouring code.
>
> What tree is that against? I cannot find x86 page colouring code in next
> or mainline.

This is against mainline.

See align_addr in arch/x86/kernel/sys_x86_64.c and the
call sites in arch_get_unmapped_area(_topdown).

On certain AMD chips, Linux tries to get certain
allocations aligned to avoid cache aliasing issues.

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