Re: [PATCH [RT] 08/14] add a loop counter based timeout mechanism

[Bill Huey (hui)]

On Fri, Feb 22, 2008 at 11:19 AM, Bill Huey (hui) <bill.huey@xxxxxxxxx> wrote:
>  Yeah, I'm not very keen on having a constant there without some
>  contention instrumentation to see how long the spins are. It would be
>  better to just let it run until either task->on_cpu is off or checking
>  if the "current" in no longer matches the mutex owner for the runqueue
>  in question. At that point, you know the thread isn't running.
>  Spinning on something like that is just a waste of time. It's for that
>  reason that doing in the spin outside of a preempt critical section
>  isn't really needed

Excuse me, I meant to say "...isn't a problem".

bill
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/