Date: Sun, 22 Feb 1998 17:16:57 +1030 From: Greg Lehey <grog@lemis.com> To: "matthew c. mead" <mmead@calvin.math.vt.edu>, questions@FreeBSD.ORG Subject: Re: new 2.2.5 installation randomly (and constantly) panics Message-ID: <19980222171657.41498@freebie.lemis.com> In-Reply-To: <19980222013641.59923@math.vt.edu>; from matthew c. mead on Sun, Feb 22, 1998 at 01:36:41AM -0500 References: <19980221202539.15260@math.vt.edu> <19980222120905.35825@freebie.lemis.com> <19980222010353.57237@math.vt.edu> <19980222165501.24195@freebie.lemis.com> <19980222013641.59923@math.vt.edu>
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On Sun, 22 February 1998 at 1:36:41 -0500, matthew c. mead wrote: > On Sun, Feb 22, 1998 at 04:55:01PM +1030, Greg Lehey wrote: > >> Ugh. A VM problem. Does this always look the same? The important >> part of this dump are the frames 11 (i586_copyin) to 5 >> (vm_pager_has_page). Possibly frames 14 to 12 are also of importance. > > Ok... I built after config -g, size /kernel and size > /sys/compile/GOOF/kernel are identical - here's a kgdb output: This is the same dump, is it? > #5 0xf017f70f in vm_pager_has_page (object=0xf0d33f80, offset=0, > before=0xefbffc6c, after=0xefbffc68) at ../../vm/vm_pager.c:209 Try this: (gdb) f 5 (gdb) l (gdb) x/20i vm_pager_has_page (gdb) i reg >>> The hardware in the machine is an ISA vga card, a dec 21040 based >>> ethernet card, an NCR 8510 PCI scsi card, an Adaptec UltraSCSI 2940, >>> and a P90 cpu (clocked to 100 - has been that way for about 2 years >>> without problems). > >> i586_copyin has been introduced since 2.1.7. I wouldn't put it beyond >> the realms of possibility for it to trigger an instability in your >> overclocking that so far has gone untriggered. How easy would it be >> to turn the machine back to 90 MHz? If that doesn't help, it would be >> instructive to build a kernel for a 486 and see if that works at >> either frequency. As you might expect, a 486 kernel doesn't use >> i586_<mumble>. > > But if I build a kernel for a 486 CPU, will it run on a 586 CPU? It should do. The 586 kernel just adds some neat optimizations which the 486 doesn't handle. i586_copyin is one of them :-) Good luck Greg To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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