PowerPC fastpaths for mutex subsystem

Anton Blanchard anton at samba.org
Sun Jan 8 19:23:01 EST 2006


 
> What's "unfair"?  Mutexes are FIFO, as are x86 semaphores.

The ppc64 semaphores dont force everyone into the slow path under
contention. So you could drop and pick up the semaphore even with
someone waiting. I thought thats how the new mutex code worked.

Anton



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