Date: Tue, 01 May 2001 16:35:45 -0400 From: "Richard S. Conto" <rsc@merit.edu> To: freebsd-stable@freebsd.org Cc: rsc@merit.edu Subject: Re: Kernel panic at 0x0 w/ 4.3-STABLE (cvsup'd 4/22/2001) Message-ID: <20010501203546.481AE5E006@segue.merit.edu> In-Reply-To: Your message of "Wed, 25 Apr 2001 11:02:15 EDT." <20010425150215.6794A5DE42@segue.merit.edu>
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As you would have it, I made a (ahem) minor (ahem) change to my kernel config file. Backing out the change let arlad's AFS work again. If I have time, I'll figure out which feature revealed the problem. I would still like some suggestions for how to pursue a kernel panic like this one, where the backtrace starts with a jump by the kernel to 0x0. > originally from: "Richard S. Conto" <rsc@merit.edu> > date: Wed, 25 Apr 2001 11:02:15 -0400 > -------- >I'd like some help coping with a kernel panic that has >been happening to me whenever I start "arla" since I cvsup'd >to 4.3-RC (in several flavors) and now 4.3-STABLE. > >All of the kernel panics I've seen had the instruction pointer >at 0x8:0x0 > >A few days ago, I submitted a "kernel panic" via the web interface >to the "ports" category, but now I realize I didn't give enough information >or submit in the right place (I think.) That submission is ports/26797. > >Since then, I've tried to get a back-trace using gdb -k per. the FAQ >(http://www.freebsd.org/doc/en_US.ISO_8859-1/books/faq/hackers.html#KERNEL-PANIC-TROUBLESHOOTING) >However, the backtrace doesn't go very far. For all of the back-traces I've >viewed, they only go back to 0x0 and no further. > >I've had "option INVARIANT_SUPPORT" turned on for a while, and I even rebuilt >the kernel with "option INVARIANTS", but that hasn't helped improve the backtrace. > >Could someone offer some suggestion about how I can gather more >information here? The box is a Dell Inspirion 3000 (cira 1977 laptop) with 32M ram. >"arla" worked fine for me with 4.2-STABLE > >--------------------------------- >module_register_init: MOD_LOAD (xfs_syscall, c014ee84, 0xc0cff920) error 17 >xfs: cdev: 128, syscall: 210 >... > >IdlePTD 4259840 >initial pcb at 34b9e0 >panicstr: page fault >panic messages: >--- >Fatal trap 12: page fault while in kernel mode >fault virtual address = 0x0 >fault code = supervisor read, page not present >instruction pointer = 0x8:0x0 >stack pointer = 0x10:0xc416af30 >frame pointer = 0x10:0xc416afa0 >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 = 362 (arlad) >interrupt mask = none >trap number = 12 >panic: page fault > >syncing disks... 19 19 18 11 4 >done >Uptime: 44s > >dumping to dev #ad/0x30001, offset 458752 >dump ata0: resetting devices .. done >32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 >--- >#0 dumpsys () at ../../kern/kern_shutdown.c:469 >469 if (dumping++) { >(kgdb) where >#0 dumpsys () at ../../kern/kern_shutdown.c:469 >#1 0xc014b36b in boot (howto=256) at ../../kern/kern_shutdown.c:309 >#2 0xc014b701 in panic (fmt=0xc02f5b0f "page fault") > at ../../kern/kern_shutdown.c:556 >#3 0xc02aaf92 in trap_fatal (frame=0xc416aef0, eva=0) > at ../../i386/i386/trap.c:951 >#4 0xc02aac45 in trap_pfault (frame=0xc416aef0, usermode=0, eva=0) > at ../../i386/i386/trap.c:844 >#5 0xc02aa7bb in trap (frame={tf_fs = 16, tf_es = 16, tf_ds = 16, tf_edi = 0, > tf_esi = 0, tf_ebp = -1005146208, tf_isp = -1005146340, > tf_ebx = -1005217088, tf_edx = -1070588424, tf_ecx = -1070588424, > tf_eax = 0, tf_trapno = 12, tf_err = 0, tf_eip = 0, tf_cs = 8, > tf_eflags = 66118, tf_esp = -1070943655, tf_ss = -1005217088}) > at ../../i386/i386/trap.c:443 >#6 0x0 in ?? () >(kgdb) quit >x25# uname -a >FreeBSD x25.home 4.3-STABLE FreeBSD 4.3-STABLE #2: Wed Apr 25 10:13:55 EDT 2001 > rsc@x25.home:/usr/src/sys/compile/INSPIRION3K i386 >x25# exit > >Script done on Wed Apr 25 10:40:56 2001 > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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