On Tue, Mar 13, 2007 at 06:41:05PM +0300, Pavel Emelianov wrote:
> > right, but atomic ops have much less impact on most
> > architectures than locks :)
> 
> Right. But atomic_add_unless() is slower as it is
> essentially a loop. See my previous letter in this sub-thread.

If I am not mistaken, you shouldn't loop in normal cases, which means
it boils down to a atomic_read() + atomic_cmpxch()


-- 
Regards,
vatsa
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