* Nicolas Pitre <[email protected]> wrote:
> > here we go to great trouble trying to avoid the 'slowpath', while we
> > unconditionally force the next unlock into the slowpath! So we have
> > not won anything. (on a cycle count basis it's probably even a net
> > loss)
>
> I disagree. [...elaborate analysis of the code ...]
you are right, it should work fine, and should be optimal. I'll add your
xchg variant to mutex-xchg.h.
Ingo
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