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From: Peter Wemm <peter@wemm.org>
To: Don Lewis <truckman@FreeBSD.org>
Date: Fri, 20 Aug 2004 15:16:32 -0700
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Subject: Re: cvs commit: src/sys/kern vfs_subr.c
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On Friday 20 August 2004 12:21 pm, Don Lewis wrote:
>   Modified files:
>     sys/kern             vfs_subr.c
>   Log:
>   Don't attempt to trigger the syncer thread final sync code in the
>   shutdown_pre_sync state if the RB_NOSYNC flag is set.  This is the
>   likely cause of hangs after a system panic that are keeping crash
>   dumps from being done.

The hang that I saw was because interrupts are broken (they just stop 
for no apparent reason) and the ata_shutdown sync hooks are not in 
polled mode (which is correct - interrupts are supposed to be enabled 
at this point, and are for normal shutdowns). 
-- 
Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com
"All of this is for nothing if we don't go to the stars" - JMS/B5