On Monday, 18 February 2002 at 15:38:07 -0500, Jake Burkholder wrote:
> Apparently, On Mon, Feb 18, 2002 at 11:51:44AM -0800,
>       Matthew Dillon said words to the effect of;
>>     I'm fairly sure JHB does not have a patch to address this but, please,
>>     be my guest and check P4.
> Actually he does.  Maybe you should have checked p4 first yourself.

Well, maybe, like me, he doesn't know how.  I only recently learnt of
the existence of this repo, and I still don't know where it is.  It
certainly wasn't announced on the SMP mailing list.  I've seen a few
references to p4 there, but no indication of how to access the repo.

> What John's patch does is spin while the lock owner is running on
> another cpu.  Spinning while there are no other processes on the run
> queues as well makes sense but you'll also be doing a lot of
> acquires and releases of sched_lock.

I must be misinterpreting this statement.  Under what circumstances do
you spin?  Yes, I read the "while the owner is running in another
CPU", but the way I read that, it turns the blocking lock into a spin

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