Re: Why Semaphore Hardware-Dependent?

[Paul Mackerras]

Andi Kleen writes:

> > That's fair enough, but I would be opposed to 
> > making semaphores bigger 
> 
> If the code was out of lined bigger wouldn't make much difference

I was referring to the data size not the code size.

> That would leave the fast path, but does it help that much there
> to have a more complicated implementation?

The implementation of the fast path is basically atomic_inc/dec.
Nothing more complicated.

Paul.
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