Hi,

In the paper 'Semaphores in Plan 9' by Sape and Russ Cox, there was this
note:
"The performance of the semaphore-based lock implementation is sometimes
much better and never noticeably worse than the spin locks. We will replace
the spin lock implementation in the Plan 9 distribution soon."

As far as I can tell, this has not happened; is there any reason why? Are
there any objections of the sem*-based locks?

Thanks,
-- vs