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    SubjectRe: [PATCH] General purpose zeroed page slab
    On Thu, Oct 14, 2004 at 06:36:47PM -0500, Adam Heath wrote:
    > On Thu, 14 Oct 2004, Andi Kleen wrote:
    >
    > > Also that's pretty dumb. How about keeping track how much of the
    > > page got non zeroed (e.g. by using a few free words in struct page
    > > for a coarse grained dirty bitmap)
    > >
    > > Then you could memset on free only the parts that got actually
    > > changed, and never waste cache lines for anything else.
    >
    > That will fail when a struct is placed in the page, and only the beginning and
    > end of the struct was changed.

    Hmm? I think you're misunderstanding me. The dirty bitmap would cover
    all areas that are potentially not zero. If someone changes a byte
    without setting the bitmap they're buggy.


    -Andi
    >
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