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    SubjectRe: [PATCH] 2.6 workaround for Athlon/Opteron prefetch errata

    > I think Alan brought up a very good point. Even if you
    > use a generic kernel that avoids prefetch use on Athlon
    > (which I am opposed to), it doesn't solve the problem
    > of user space programs detecting that the ISA supports
    > prefetch and using prefetch instructions and hitting the
    > errata on Athlon.
    > The user space problem worries me more, because the expectation
    > is that if CPUID says the program can use perfetch, it could
    > and should regardless of what the kernel decided to do here.

    User programs should not rely on cpuid; they should read /proc/cpuinfo
    exactly because this kind of errata.

    When do you have a heart between your knees?
    [Johanka's followup: and *two* hearts?]
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