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    SubjectRe: [PATCH 2/5] Light Fragmentation Avoidance V20: 002_usemap
    On Tue, 22 Nov 2005, Andi Kleen wrote:

    > > All of that said, I am not even sure we have a bit left in the page
    > > flags on smaller architectures :/.
    > How about
    > #define PG_checked 8 /* kill me in 2.5.<early>. */
    > ?
    > At least PG_uncached isn't used on many architectures too, so could
    > be reused. I don't know why those that use it don't check VMAs instead.

    PG_unchecked appears to be totally unused. It's only users are the macros
    that manipulate the bit and mm/page_alloc.c . It appears it has been a
    long time since it was used to it is a canditate for reuse.

    Mel Gorman
    Part-time Phd Student Java Applications Developer
    University of Limerick IBM Dublin Software Lab
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