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