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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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