From owner-freebsd-current  Sun Aug 29 23:10:26 1999
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To: Matthew Dillon <dillon@apollo.backplane.com>
Cc: Bernd Walter <ticso@cicely.de>, Mike Smith <mike@smith.net.au>,
	freebsd-current@FreeBSD.ORG, grog@lemis.com
Subject: Re: 4.0-CURRENT SMP crash with vinum raid-5 and softupdates 
In-Reply-To: Message from Matthew Dillon <dillon@apollo.backplane.com> 
   of "Sun, 29 Aug 1999 22:59:22 PDT." <199908300559.WAA09987@apollo.backplane.com> 
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Date: Sun, 29 Aug 1999 23:09:48 -0700
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From: Parag Patel <parag@cgt.com>
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On Sun, 29 Aug 1999 22:59:22 PDT, Matthew Dillon wrote:
>
>    This is definitely a pbuf.  Did you apply the patches Greg emailed?
>    They will panic the machine earlier while it is still in the correct
>    stack frame, allowing Greg to track down where the I/O initiation came
>    from.

Greg's debugging this on the machine here at the moment, which is
crashing the same way in what appears to be the same place.

If anyone else wants to take a crack it, the magic vinum debug number
needed is 328 and not 324.

So far Greg's discovered that the field is correctly set a little while
before the crash, and then becomes NULL for no apparent reason.  Looks
like a really nasty bug.

The nice thing is this loaner machine has no real job to do besides
crashing, so it can crash as often as required.  :)


	-- Parag


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