On Sun, Jul 07, 2002 at 11:06:32PM -0400, Alexander Viro wrote:
> The thing being, if you are already contended you are playing "I'll release
> CPU now" vs. "I'll spin in hope that contender will go away right now".
>
> IOW, it's a win only if you get contention often and for short intervals.
> Which is a very good indication that something is rotten with your locking
> scheme. Like, say it, having lost the control over the amount of locks
> as the result of brainde^Woverenthusiastic belief that fine-grained ==
> good. With everything that follows from that...
So let's get some numbers. It really shouldn't be hard to make our
current semaphores spin a little before they sleep. If we get some
numbers showing it does help then either we need this change in mainline
or we need to fix our locking.
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