From owner-freebsd-current@FreeBSD.ORG  Tue Jul 17 22:13:33 2007
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Date: Wed, 18 Jul 2007 00:13:28 +0200
From: Roman Divacky <rdivacky@freebsd.org>
To: Teufel <bsd@kuehlbox.de>
Message-ID: <20070717221327.GA60004@freebsd.org>
References: <20070716233030.D92541@10.0.0.1> <469D2688.7070000@kuehlbox.de>
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Cc: attilio@freebsd.org, Jeff Roberson <jroberson@chesapeake.net>,
	current@freebsd.org
Subject: Re: ULE/SCHED_SMP diff for 7.0 - panic on x86
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On Tue, Jul 17, 2007 at 10:28:56PM +0200, Teufel wrote:
> Hi,
> 
> cvsuped kernel sources about 20 mins ago and applied Jeff's new ule patch.
> System boots normaly up, but starting qemu with kqemu (either user or 
> user and kernel space) results immediatly in kernel trap 12
> applying Attilio's    patch 
> http://people.freebsd.org/~attilio/kqemu.diff     fixed the kernel trap, 
> but hangs:
> 
> spin lock 0xc0bbf780 (shed lock 1) held by 0xc5114880 (tid 100003) too long
> panic: spin lock held too long
> cpuid = 0

this looks similar to what people are seeing on pointyhat building  cluster.

its definitely NOT related to kqemu desynced module/kernel. I have told attilio
about it. no response yet...