Date: Tue, 8 Feb 2005 13:17:40 -0500 From: John Baldwin <jhb@FreeBSD.org> To: freebsd-current@FreeBSD.org Subject: Re: Deadlock with option FULL_PREEMPTION Message-ID: <200502081317.40267.jhb@FreeBSD.org> In-Reply-To: <20050206134113.GA77071@peter.osted.lan> References: <20050206134113.GA77071@peter.osted.lan>
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On Sunday 06 February 2005 08:41 am, Peter Holm wrote: > With GENERIC HEAD from Feb 5 09:19 UTC + FULL_PREEMPTION + > mpsafe_vfs = 1 I ran into what appears to be the same deadlock > twice. This is the first one: > http://www.holm.cc/stress/log/cons114.html What is the deadlock exactly? It looks like lots of threads banging on fork() and that they are all waiting on an exclusive lock of allproc_lock while holding a shared lock of proctree_lock (except for the 1 thread currently doing a fork that is on a run queue because it was preempted by IRQ 0 which kicked off softclock). Can you get 'ps' output? -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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