Date: Sun, 16 Jun 1996 17:12:51 -0700 From: David Greenman <davidg@Root.COM> To: David Malone <dwmalone@maths.tcd.ie> Cc: freebsd-stable@freebsd.org Subject: Re: Trap 12/supervisor read, page not present Message-ID: <199606170012.RAA03469@Root.COM> In-Reply-To: Your message of "Sun, 16 Jun 1996 12:51:52 -0000." <9606161251.aa07235@salmon.maths.tcd.ie>
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>I supped the -stable stuff a few hours after I got this message ( the file >you mention was at version 1.22.4.4 ) and it didn't stay up for more that >about 2 minutes, I have a vmcore if its of any use, the message was Right, I missed one change and had to do another commit. >Fatal trap 12: page fault while in kernel mode >fault virtual address = 0xf0f6d318 >fault code = supervisor read, page not present >instruction pointer = 0x8:0xf010ee04 >code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, def32 1, gran 1 >processor eflags = interrupt enabled, resume, IOPL = 0 >current process = 356 (reboot) >interrupt mask = > >( I'd just installed and rebooted, and wanted to reboot again, loged >in as root, typed reboot and then if fell over before shutting down ). >I'm not sure if I've done this quite right - but this is what >"gdb -k kernel.0 vmcore.0" gave me for a back trace : > >#0 0xf01938bb in boot () >#1 0xf01160c5 in panic () >#2 0xf0101275 in db_panic () >#3 0xf010115e in db_command () >#4 0xf01012dd in db_command_loop () >#5 0xf0103c78 in db_trap () >#6 0xf019082a in kdb_trap () >#7 0xf0198703 in trap_fatal () >#8 0xf0198280 in trap_pfault () >#9 0xf0197ed3 in trap () >#10 0xf0191091 in calltrap () >#11 0xf1297cba in end () >#12 0xf012cfbf in vclean () >#13 0xf012d0f4 in vgone () >#14 0xf1297267 in end () >#15 0xf012dea8 in dounmount () >#16 0xf012c169 in vfs_unmountall () >#17 0xf019384f in boot () >#18 0xf01145c1 in reboot () >#19 0xf01989ef in syscall () >#20 0xf01910db in Xsyscall () >#21 0x10d3 in ?? () This kinda smells like an out of date LKM - especially the entry at #11 which is clearly outside of the standard kernel binary. What filesystems are you using, and do you have them all statically compiled in your kernel? -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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