Date: Fri, 18 Nov 2005 22:06:47 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-current@freebsd.org Cc: amd64@freebsd.org, Matthew Dillon <dillon@apollo.backplane.com>, Peter Wemm <peter@freebsd.org> Subject: Re: 7-CURRENT-SNAP009-i386-bootonly.iso on Shuttle XPC w/ AMD X2 (was Re: Side note on Shuttle XPC) Message-ID: <200511182206.49195.jhb@freebsd.org> In-Reply-To: <200511190018.jAJ0ItTe013855@apollo.backplane.com> References: <20051117010651.97608.qmail@web50303.mail.yahoo.com> <437E6AF7.1040402@samsco.org> <200511190018.jAJ0ItTe013855@apollo.backplane.com>
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On Friday 18 November 2005 07:18 pm, Matthew Dillon wrote: > :So the amd64 snapshot didn't boot but the i386 one did? Interesting. > :Thanks a lot for investigating this. > : > :Scott > > Yup. My guess is that the 64-bit boot issue that early in the boot > sequence is something stupid simple. It looks it from the consistency > of the crash. Actually, your comments about the stray ICU interrupts led me to it on the = way=20 home tonight. Peter has a hack in amd64 that if you don't include 'device= =20 atpic' in your kernel config (not in GENERIC amd64 by default in HEAD) he=20 just masks the PICs. However, he doesn't setup handlers for the spurious=20 interrupts that can still occur (since they are unmaskable). Couple that=20 with the fact that HEAD (until a few hours ago) didn't print the trap messa= ge=20 for a T_RESERVED trap, and you'll see that your panic on amd64 was caused b= y=20 a spurious ICU interrupt. I have part of peter's hack expanded to do a ful= l=20 reset of the ICUs, and I'll update it for Monday to adjust the base interru= pt=20 such that the spurious ICU vectors get sent to the APIC spurious interrupt= =20 vector. That should fix your issue as well as the same issue reported by=20 someone else on the amd64@ list recently. =2D-=20 John Baldwin <jhb@FreeBSD.org> =A0<>< =A0http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" =A0=3D =A0http://www.FreeBSD.org
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