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    SubjectRe: [patch 0/9] mutex subsystem, -V4
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    On Fri, 2005-12-23 at 15:57, Russell King wrote:
    > On Fri, Dec 23, 2005 at 06:51:18AM -0800, Andrew Morton wrote:
    > > Nicolas Pitre <nico@cam.org> wrote:
    > > > How can't you get the fact that semaphores could _never_ be as simple as
    > > > mutexes? This is a theoritical impossibility, which maybe turns out not
    > > > to be so true on x86, but which is damn true on ARM where the fast path
    > > > (the common case of a mutex) is significantly more efficient.
    > >
    > > I did notice your comments. I'll grant that mutexes will save some tens of
    > > fastpath cycles on one minor architecture. Sorry, but that doesn't seem
    > > very important.
    >
    > Wow.

    Yes, wow. Andrew doesn't seem aware of embedded linux people, for whom
    cycles are important and ARM is king.

    Xav


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