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From: John Baldwin <jhb@FreeBSD.org>
To: Maxim Maximov <mcsi@mcsi.pp.ru>
Date: Fri, 3 Sep 2004 10:23:55 -0400
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cc: current@FreeBSD.org
cc: Nate Lawson <nate@root.org>
Subject: Re: panic on shutdown
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On Thursday 02 September 2004 11:51 pm, Maxim Maximov wrote:
> Hello.
>
> 	I just got this panic on shutdown using Power button, hand transcribed:
>
> Syncing disks: <numbers>
> No buffers busy after final sync
> Uptime: 21m53s
> Powering system off using ACPI
>
> panic: lock (sleep mutex) Giant not locked @
> /usr/src/sys/kern/kern_timeout.c:279
>
> cpuid = 0
> KDB: enter: panic
> ACPI power-off failed - timeout
>
> Rebooting...
> cpu_reset: called on cpu#1
> cpu_reset: Stopping other CPUs
>
> Here it hung until I pressed Power button again. Then it shut down.

Looks like the timeout/callout routine dropped Giant more than it acquired it.

-- 
John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org