On Thu, Jul 29, 2004 at 07:29:41AM +0400, Maxim Maximov wrote: > John Baldwin wrote: > >Included below are two patches for two different potential deadlocks on > >SMP. The first one I have sent to the list before, but it didn't seem to > >help anyone. I do believe it is a fix for a possible deadlock though so > >I'd like some more testing feedback with the aim of committing it. The > >second patch works around a lock order reversal introduced with the sleep > >queue code (since sched_lock's scope was reduced) at the expense of > >increasing the latency between a swapped out thread becoming runnable and > >the swapper waking up to swap the process back in. > > I'm sorry, but for me PREEMPTION defined in kernel with these patches is > still causing deadlocks. SMP, HTT enabled. These changes seem totally unrelated to my instability with PREEMPTION (so I didn't try to enable it at all, but am running with these changes). They should instead fix some issues Kris Kennaway has been seeing with the ports cluster (but I have not tried to reproduce myself). -- Brian Fundakowski Feldman \'[ FreeBSD ]''''''''''\ <> green_at_FreeBSD.org \ The Power to Serve! \ Opinions expressed are my own. \,,,,,,,,,,,,,,,,,,,,,,\Received on Thu Jul 29 2004 - 01:57:07 UTC
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