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    SubjectRe: Intel P6 vs P7 system call performance
    Linus Torvalds wrote:
    > On Tue, 17 Dec 2002, Linus Torvalds wrote:
    >
    >>How about this diff? It does both the 6-parameter thing _and_ the
    >>AT_SYSINFO addition.
    >
    >
    > The 6-parameter thing is broken. It's clever, but playing games with %ebp
    > is not going to work with restarting of the system call - we need to
    > restart with the proper %ebp.
    >

    This confuses me -- there seems to be no reason this shouldn't work as
    long as %esp == %ebp on sysexit. The SYSEXIT-trashed GPRs seem like a
    bigger problem.

    -hpa


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