Re: Why Semaphore Hardware-Dependent?

Paul Mackerras
2006-08-29T01:00:25Z

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.