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Date: Thu, 31 Jan 2008 11:26:28 +0100
From: Kris Kennaway <kris@FreeBSD.org>
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To: s3raphi <seraphi.lord@gmail.com>
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Cc: freebsd-bugs@freebsd.org
Subject: Re: FreeBSD7-RC1: panic: spin lock held too long
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s3raphi wrote:
> I have a FreeBSD7-RC1 AMD-64 system. It has a single Opteron 2224 and a
> nvidia chipset. The kernel is default.
> 
> Sometimes when I reboot the system, it hangs with the following message on
> the screen. This has happened many times, but does not happen every time:
> 
> Waiting (max 60 seconds) for system to process 'vnlru' to stop...done
> Waiting (max 60 seconds) for system to process ' syncer' to stop...
> Syncing disks, vnodes remaining...0 0 done
> Waiting (max 60 seconds) for system to process 'bufdaemon' to stop...done
> All buffers synced.
> Uptime: 3m9s
> Rebooting...
> cpu_ reset: Stopping other CPUs
> Spin lock 0xffffffff80a743a0 (sched lock) held by 0xffffff000122f680 (tid
> 100002) too long
> panic: spin lock held too long
> cpuid = 0
> 
> 
> When this happens, I power cycle the system and it comes back up with no
> problem. 

Can you try to reproduce with WITNESS and INVARIANTS enabled?

Kris