From owner-freebsd-current@FreeBSD.ORG  Wed Oct 19 15:30:50 2005
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Date: Wed, 19 Oct 2005 09:29:57 -0600 (MDT)
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To: info@martenvijn.nl
From: "M. Warner Losh" <imp@bsdimp.com>
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Cc: freebsd-current@freebsd.org
Subject: Re: cf-card in pccard slot panics kernel 6.0 BETA and rc1 at
 boottime
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In message: <1129735927.689.37.camel@localhost.localdomain>
            Marten Vijn <info@martenvijn.nl> writes:
: On Tue, 2005-10-18 at 17:04 -0600, M. Warner Losh wrote:
: 
: 1 ==> Maybe you could also try:
: > 
: > 	On Sat, 2005-10-15 at 22:21 -0600, M. Warner Losh wrote:
: >         ...> Please consider applying the following patch. 
: >         <cut>
: > 	and see if that changes anything... 
: 
: With or without the patch there is no difference.
: 
: 
: 2 ==>
: > Any chance for a trace?  Without it, this is impossible to make
: > progress on since it doesn't happen for me here...
: 
: Yes, I would like but I don't know how jet.
: 
: added for debugging to my kernelconfig:
: 
: options         KTR
: options         KTR_ENTRIES=1024
: options         KTR_VERBOSE
: options         KTR_ALQ

Actually you need the following:

#
# Compile with kernel debugger related code.
#
options 	KDB
#
# Enable the ddb debugger backend.
#
options 	DDB

and when the panic happens, you'll get 'db> ' prompt.  Type 'trace'
there and report what comes back.

Warner