On Sun, 27 Aug 2006, Andi Kleen wrote:
> x86-64 always uses the spinlocked version (vs i386 using the atomic one)
> and I haven't heard of anybody complaining.
Ia64 has special counters for rwsemaphores. I'd like to see if there is
any performance loss. mmap_sem is a rwsemaphore. This is performance
critical.
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