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    SubjectRe: [PATCH RFC] x86: fix confusing name of /proc/cpuinfo "ht" flag
    On Thu, Nov 12, 2009 at 06:59:08PM +0100, Ingo Molnar wrote:
    > > It's an ABI. Keep it stable, please.
    >
    > That's generally true, but i'm not suggesting that: i'm suggesting to
    > _clear_ the HT flag from the cpufeatures if there's only one sibling.
    > It's meaningless in that case and as the link quoted by the original
    > patch shows many people are confused by that.
    >
    > I have such a box so i can test it. (but i dont expect any problems)

    I agree that it's an ABI change, but any software depending on its current
    state has to implement a fallback for the case where 'ht' isn't present anyway
    unless there's some program that only runs on ht capable hardware, which
    sounds just crazy.

    The only potential for breakage that I can see is that code that is tuned
    to be run in the HT case will stop running in cases where it shouldn't.
    Which sounds like a positive thing to me.

    Dave

    --
    http://www.codemonkey.org.uk


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