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    SubjectRe: [POLL] SLAB : Are the 32 and 192 bytes caches really usefull on x86_64 machines ?
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    On Monday 02 January 2006 09:37, Pekka Enberg wrote:
    > On 12/28/05, Andreas Kleen <ak@suse.de> wrote:
    > > I remember the original slab paper from Bonwick actually mentioned that
    > > power of two slabs are the worst choice for a malloc - but for some reason Linux
    > > chose them anyways.
    >
    > Power of two sizes are bad because memory accesses tend to concentrate
    > on the same cache lines but slab coloring should take care of that. So
    > I don't think there's a problem with using power of twos for kmalloc()
    > caches.

    There is - who tells you it's the best possible distribution of memory?

    -Andi


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