Re: [PATCH 2/5] Light Fragmentation Avoidance V20: 002_usemap

[Andi Kleen]

On Tuesday 15 November 2005 17:49, Mel Gorman wrote:
> This patch adds a "usemap" to the allocator. Each bit in the usemap indicates
> whether a block of 2^(MAX_ORDER-1) pages are being used for kernel or
> easily-reclaimed allocations. This enumerates two types of allocations;

This will increase cache line footprint, which is costly.
Why can't this be done in the page flags?

-Andi

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