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    SubjectRe: [patch] x86, mm: pass in 'total' to __copy_from_user_*nocache()
    Nick Piggin wrote:
    > I would expect any high performance CPU these days to combine entries
    > in the store queue, even for normal store instructions (especially for
    > linear memcpy patterns). Isn't this likely to be the case?

    Actually, that is often not the case simply because it doesn't buy that
    much. The big win comes when you don't read a whole cache line in from
    memory, but that is a property of the cache, not the store queue.


    H. Peter Anvin, Intel Open Source Technology Center
    I work for Intel. I don't speak on their behalf.

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      Last update: 2009-03-02 05:53    [W:0.018 / U:1.504 seconds]
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