Messages in this thread | | | Date | Fri, 22 Feb 2008 11:21:14 -0800 | From | "Bill Huey (hui)" <> | Subject | Re: [PATCH [RT] 08/14] add a loop counter based timeout mechanism |
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On Fri, Feb 22, 2008 at 11:19 AM, Bill Huey (hui) <bill.huey@gmail.com> 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
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