Date: Mon, 4 Jul 2005 17:03:20 -0700 From: Marcel Moolenaar <marcel@xcllnt.net> To: Wilko Bulte <wb@freebie.xs4all.nl> Cc: Poul-Henning Kamp <phk@haven.freebsd.dk>, alpha@freebsd.org Subject: Re: GENERIC doesn't boot AlphaServer 1000 Message-ID: <a7d5e4a414edbf220ba47c4bfcd2da92@xcllnt.net> In-Reply-To: <20050704202716.GA49737@freebie.xs4all.nl> References: <27190.1120379420@phk.freebsd.dk> <20050704190131.GA49126@freebie.xs4all.nl> <8fe809bd5c24373ce1cd95c4fcdcea88@xcllnt.net> <20050704202716.GA49737@freebie.xs4all.nl>
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On Jul 4, 2005, at 1:27 PM, Wilko Bulte wrote: >> >> The only alignment sensitive statement in is_pmbr() (in file >> geom_gpt.c) >> is a 16-bit load from an address that is guaranteed to be aligned by >> virtue of alignment guarantees of malloc(3) and kernel equivalents. >> The faulting VA is in fact sufficiently aligned for a 16-bit load. >> >> Could you post the assembly of is_pmbr(). It might be bad code. > > Well, I tried multiple things in the meantime. 'dd' of /dev/zero onto > this SCSI disk stopped the panic alright. Hmmm. Not only should we never panic due to some random data that may be on a disk, now that you zeroed the (first part of the) disk, we may not find out what went wrong. The panic you got is likely to affect all platforms. -- Marcel Moolenaar USPA: A-39004 marcel@xcllnt.net
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