Date: Thu, 29 Apr 1999 15:18:15 -0500 From: Stephen Montgomery-Smith <stephen@math.missouri.edu> To: freebsd-stable@freebsd.org Subject: Kernel Panic Message-ID: <3728BE87.54FE350C@math.missouri.edu> References: <Pine.BSF.4.05.9904171248540.5956-100000@iclub.nsu.ru>
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Yesterday I replaced a Cyrix 686 (133Mhz) with a Pentium MMX 223Mhz.
Then, when I booted up, I got a panic message (that I enclose below).
Then I reboot. Since the panic failed to sync the disks, the kernel
goes through the process of rebooting, including fixing the incorrect
superblocks, and then everything works fine.
Today I found out that my /etc was not up to date. My last make world
was March 30 1999, whereas my /etc was last updated March 5 1999.
The changes don't seem that significant. Could that have caused the
problem? I updated /etc, and the problem seems to have stopped.
But the panic seems a tough punishment for having /etc 25 days old.
Could it be that I have merely slightly changed an odd set of
circumstances that trigger this problem, and that I have not found the
true cause?
The panic message comes just after the kernel sends out the message
saying it has started sendmail, and just before the message:
Initial rc.i386 initialization: linux
so maybe it is the linux emulation that does this.
This action has happened many times, so it seems rather
consistant. I had to copy the panic message by hand, since as far
as I can figure, this message has not been saved anywhere.
All of the times, the message was exactly the same.
I never had this message when I booted using kernel.GENERIC.
I am using FreeBSD 3.1, last make world March 30 1999.
Here is the message:
kernel trap 12 with interupts disabled
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xeffcd004
fault code = supervisor read, page not present
instruction pointer = 0x8:0xf01a5c33
stack pointer = 0x10:0xf33d6d38
frame pointer = 0x10:oxf33d6d50
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IPOL = 0
current process = Idle
interrupt mask = net tty bio cam
trap number = 12
panic: page fault
syncing disks ...
By the way, the syncing disks message is a lie - at this point it hangs
(although it does echo keyboard responses).
--
Stephen Montgomery-Smith stephen@math.missouri.edu
307 Math Science Building stephen@showme.missouri.edu
Department of Mathematics stephen@missouri.edu
University of Missouri-Columbia
Columbia, MO 65211
USA
Phone (573) 882 4540
Fax (573) 882 1869
http://math.missouri.edu/~stephen
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