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    SubjectRe: [GIT PULL] x86/cpu changes for v2.6.34
    On 02/27/2010 09:10 AM, Arjan van de Ven wrote:
    > On Sat, 27 Feb 2010 16:09:42 +0100
    > Ingo Molnar <mingo@elte.hu> wrote:
    >
    >> +int wbinvd_on_all_cpus(void)
    >> +{
    >> + return on_each_cpu(__wbinvd, NULL, 1);
    >> +}
    >
    > does this make sense at all?
    >
    > doesn't cache coherency on x86 already guarantee this?
    >

    No, WBINVD (unlike CLFLUSH) is local to one CPU.

    -hpa

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



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