Date: Thu, 26 Jun 2008 20:19:46 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-current@freebsd.org Cc: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>, Poul-Henning Kamp <phk@phk.freebsd.dk>, Pawel Jakub Dawidek <pjd@freebsd.org>, FreeBSD current mailing list <current@freebsd.org> Subject: Re: panic in geom (spindown + eil + journal) Message-ID: <200806262019.47095.jhb@freebsd.org> In-Reply-To: <4K5%2BlNH1xm4QaKlQAizl2ATEu4I@w17qTvyS5I3zcalA0LVEglQwDKY> References: <91492.1214431446@critter.freebsd.dk> <20080626122202.O83875@maildrop.int.zabbadoz.net> <4K5%2BlNH1xm4QaKlQAizl2ATEu4I@w17qTvyS5I3zcalA0LVEglQwDKY>
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On Thursday 26 June 2008 09:59:56 am Eygene Ryabinkin wrote: > Bjoern, good day. > > Thu, Jun 26, 2008 at 12:26:42PM +0000, Bjoern A. Zeeb wrote: > > I guess some pointer artimetic or anything went wrong here for some > > reason. ad0 is a simple hdd with a few slices with different, mostly > > FreeBSD, installations. ad8 has, as seen above, eli on the disk and > > one standard gjournaled UFS on top of that. > > May be provider's geom data was trashed in some way. > > > Is there any information I could try to find out to find that bug. > > I had done the same thing hundreds of times before, the only new thing > > from yesterday on was the spindown on 2 of 3 disks. > > Any chances to compile debug kernel with KDB/DDB > > http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug-online-ddb.html > > 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. -- John Baldwin
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