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    SubjectRe: [patch 04/15] Generic Mutex Subsystem, add-atomic-call-func-x86_64.patch
    On Wed, 21 Dec 2005, Nick Piggin wrote:

    > Nicolas Pitre wrote:
    > > On Tue, 20 Dec 2005, Nick Piggin wrote:
    > > > Considering that on UP, the arm should not need to disable interrupts
    > > > for this function (or has someone refuted Linus?), how about:
    > >
    > >
    > > Kernel preemption.
    > >
    > preempt_disable() ?

    Sure, and we're now more costly than the current implementation with irq

    If we go with simple mutexes that's because there is a gain, even a huge
    one on ARM, especially for the fast uncontended case. If you guys
    insist on making things so generic and rigid then there is no gain
    anymore worth the bother.

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      Last update: 2005-12-20 15:37    [W:0.019 / U:5.156 seconds]
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