Date: Fri, 7 Apr 2000 07:30:47 -0400 (EDT) From: Tom Rataski <tom@winc.com> To: freebsd-questions@freebsd.org Subject: Page fault in kernel mode page fault Message-ID: <Pine.BSF.4.20.0004070727130.2030-100000@furball.winc.com>
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I have a 133mhz P5 systm running V3.3 solid since last september. Last
sunday evening it started panicing regularly with a kernel mode page
fault. It looks like anytime procmail runs the system rolls over. I have
disabled and the system is stable again. Of course, the purpose of this
machine is to send and receive mail so that is not a good solution. I have
taken a crash and it follows at the end.
The things I have done:
- checked for obvious intrusions
- re-installed procmail
- restored from a know good backup (pre-crashing)
- removed all interface cards
- changed memory (all but lower 8mb since soldered on MB)
- disabled external cache
- rebuilt kernel w/debug
None of these helped
I am at a loss at what to look for next.
Anybody have any suggestions??
Thanks
-TomR-
#furball> gdb -k
GNU gdb 4.18
Copyright 1998 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-unknown-freebsd".
(kgdb) symbol-file sys/compile/FURBALL/kernel.debug
Reading symbols from /sys/compile/FURBALL/kernel.debug...done.
(kgdb) exec-file /var/crash/kernel.0
(kgdb) core-file /var/crash/vmcore.0
IdlePTD 2973696
initial pcb at 266b80
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 = 0x8:0xc022ea8f
stack pointer = 0x10:0xc36bdf28
frame pointer = 0x10:0xc36bdf28
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 = 292 (procmail)
interrupt mask =
trap number = 12
panic: page fault
syncing disks... 25 25 16 10 done
dumping to dev 20001, offset 49152
dump 39 38 37 36 35 34 33 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 boot (howto=256) at ../../kern/kern_shutdown.c:285
285 dumppcb.pcb_cr3 = rcr3();
(kgdb) where
#0 boot (howto=256) at ../../kern/kern_shutdown.c:285
#1 0xc014b708 in at_shutdown (
function=0xc0245c72 <__set_sysinit_set_sym_memdev_sys_init+1050>,
arg=0xc362f3c0, queue=-1016907200) at ../../kern/kern_shutdown.c:446
#2 0xc0212475 in trap_fatal (frame=0xc36bdeec, eva=0)
at ../../i386/i386/trap.c:942
#3 0xc0212153 in trap_pfault (frame=0xc36bdeec, usermode=0, eva=0)
at ../../i386/i386/trap.c:835
#4 0xc0211dca in trap (frame={tf_es = 16, tf_ds = 16, tf_edi = 1, tf_esi = 0,
tf_ebp = -1016340696, tf_isp = -1016340716, tf_ebx = 0, tf_edx = 0,
tf_ecx = -1065310991, tf_eax = -1065311149, tf_trapno = 12, tf_err = 0,
tf_eip = -1071453553, tf_cs = 8, tf_eflags = 66178,
tf_esp = -1016340664, tf_ss = -1065318207}) at ../../i386/i386/trap.c:437
#5 0xc022ea8f in strcmp (s1=0x0, s2=0xc080a4f0 "S_BASE=/")
at ../../libkern/strcmp.c:50
#6 0xc08088c1 in ?? ()
#7 0xc08086eb in ?? ()
#8 0xc02126b7 in syscall (frame={tf_es = 39, tf_ds = 39, tf_edi = 0,
tf_esi = 134586368, tf_ebp = -1077945276, tf_isp = -1016340508,
tf_ebx = 672114736, tf_edx = 0, tf_ecx = 0, tf_eax = 188,
tf_trapno = 12, tf_err = 2, tf_eip = 671859688, tf_cs = 31,
tf_eflags = 582, tf_esp = -1077945400, tf_ss = 39})
at ../../i386/i386/trap.c:1100
---Type <return> to continue, or q <return> to quit---
#9 0xc020521c in Xint0x80_syscall ()
#10 0x280e2c80 in ?? ()
#11 0x280b5cdc in ?? ()
#12 0x280b5b1a in ?? ()
#13 0x8053d0f in ?? ()
#14 0x8053da4 in ?? ()
#15 0x80495e1 in ?? ()
#16 0x8049c47 in ?? ()
#17 0x8049551 in ?? ()
(kgdb) q
--
Tom Rataski
Akron, Ohio USA
tom at winc dot com
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