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Date:      Fri, 27 Jun 2008 12:30:04 +0400
From:      Eygene Ryabinkin <rea-fbsd@codelabs.ru>
To:        John Baldwin <jhb@freebsd.org>
Cc:        "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>, Poul-Henning Kamp <phk@phk.freebsd.dk>, freebsd-current@freebsd.org, Pawel Jakub Dawidek <pjd@freebsd.org>, FreeBSD current mailing list <current@freebsd.org>
Subject:   Re: panic in geom (spindown + eil + journal)
Message-ID:  <u4uXu8ke1W57gMiLvLGjhl//%2BRg@uqQrEgtX6U4NMXCt5NDlpXxAUIM>
In-Reply-To: <200806262019.47095.jhb@freebsd.org>
References:  <91492.1214431446@critter.freebsd.dk> <20080626122202.O83875@maildrop.int.zabbadoz.net> <4K5%2BlNH1xm4QaKlQAizl2ATEu4I@w17qTvyS5I3zcalA0LVEglQwDKY> <200806262019.47095.jhb@freebsd.org>

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Thu, Jun 26, 2008 at 08:19:46PM -0400, John Baldwin wrote:
> > and when system will panic and debugger will be invoked, issue
> > commands 'p *(bp->bio_offset)' and 'p *(cp->provider)' at the stack
> > frame corresponding to the function g_io_request?
> 
> Note that DDB can't handle structure dereferences like that (nor evaluate 
> symbols for local variables), you'll need to get a crash dump and use kgdb 
> for that sort of thing.

Yes, you're right -- thanks for correcting me.  Bjoern, can you obtain
the crash dump and see what is inside the passed structures?
-- 
Eygene

Remember that it is hard to read the on-line manual while single-stepping
the kernel.  -- FreeBSD Developers handbook



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