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    SubjectRe: [git pull] x86 fixes


    On Mon, 8 Sep 2008, Linus Torvalds wrote:
    >
    > - X86_GENERIC means _other_ things too, like doing a 128-bit cacheline
    > just so that it won't suck horribly on P4's even if it's otherwise
    > tuned for a good microarchitecture.

    Hmm. The only other thing seems to be X86_INTEL_USERCOPY. Which doesn't
    seem to be something we want to force either.

    And I have to say, that whole X86_GENERIC -> L1_CACHE_BYTES=128 ->
    cache_line_size() -> SLAB/SLUB/SLOB alignment worries me too. Looking at
    that, I really don't feel like I want to force 128-byte alignment on
    everybody, just because the P4 was a pig in cacheline size.

    So NOPL really stands out as being different from the other things that
    X86_GENERIC does.

    Linus


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