Date: Thu, 29 Jul 2004 07:29:41 +0400 From: Maxim Maximov <mcsi@mcsi.pp.ru> To: current@freebsd.org Subject: Re: A couple of SMP deadlock patches Message-ID: <41086F25.3070707@mcsi.pp.ru> In-Reply-To: <200407281329.27271.jhb@FreeBSD.org> References: <200407281329.27271.jhb@FreeBSD.org>
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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. -- Maxim Maximov
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