I am trying to trouble shoot a crash using lkcd (Linux Kernel Crash Dump). I
got you email address from the following URL
http://www.oss.sgi.com/projects/lkcd/download/doc/linuxworld2000/LKCD.html
<http://www.oss.sgi.com/projects/lkcd/download/doc/linuxworld2000/LKCD.html>
Problem: the crash dump facility is crashing after a crash is detected.
Crash dump:
Unable to handle kernel NULL pointer dereference<1>Unable to handle kernel
paging request at virtual address 0ec4e430
printing eip: c0108fb3
*pde = 00000000
Oops: 0002
CPU: 1471744
EIP: 0010:[<c0108fb3>]
EFLAGS: 00010006
eax: 13a66000 ebx: 00000000 ecx: 00000016 edx: 00000018
esi: c0297800 edi: 00000000 ebp: c029c906 esp: c349feb8
ds: 0018 es: 0018 ss: 0018
Process erred (pid: 1835619449, stackpage=c349f000)
Stack: 00167500 00000000 00000030 c029c937 c029c906 c01072b0 00000000
00000016
00000010 00000030 c029c937 c029c906 00000000 00000018 00000018
ffffff00
c0114891 00000010 00000282 00000282 00000000 c029c936 00000033
c349e000
Call Trace: [<c01072b0>] [<c0114891>] [<c0110b60>] [<c0110e57>] [<c0110b60>]
[<c
0107334>] [<c0110b60>]
[<c0110bc2>]
Code: ff 04 85 30 64 2b c0 f0 fe 8b 10 78 29 c0 0f 88 5d 64 0f 00
Dumping to device 0x341 [ide0(3,65)] ...
Writing dump header ...<1>Unable to handle kernel paging request at virtual
addr
ess 423b1045
printing eip:
c012a373
*pde = 00000000
Particulars:
* My development machine is a Pentium 133 with two ide drives.
* The OS: Red Hat Linux release 7.0.91 (Wolverine Kernel 2.4.3 on an
i586)
* Using lkcdutils-1.0-7 for i386
* kernel patch lkcd-2.4.3.diff
* /dev/vmdump is linked to /dev/hdb1
* /dev/hdb1 is the swap partition currently used by the development
machine.
[root@mill /root]# swapon -s
Filename Type Size Used Priority
/dev/hdb1 partition 133016 16 -1
* Could not use patch which modified rc.sysinit. I modified the
/etc/rc.sysinit to look like this. Note this is only a portion of the
rc.sysinit.
# Mount all other filesystems (except for NFS and /proc, which is already
# mounted). Contrary to standard usage,
# filesystems are NOT unmounted in single user mode.
action $"Mounting local filesystems: " mount -a -t nonfs,smbfs,ncpfs
if [ -x /sbin/vmdump ] ; then
action "Configuring system for crash dumps" /sbin/vmdump config
fi
if [ -x /sbin/vmdump ] ; then
action "Saving crash dump (if one exists)" /sbin/vmdump save
fi
if [ X"$_RUN_QUOTACHECK" = X1 -a -x /sbin/quotacheck ]; then
action $"Checking filesystem quotas: " /sbin/quotacheck -v -R -a
fi
Pertinent Question:
* Is my dump device set up correctly?
* If necessary how to I properly setup /etc/fstab to use a swap
partition that is a file? Can Linux use a swap partition file and lkcd use
/dev/hdb1?
Jeff Goldszer
Senior Software Engineer
Computer Network Technologies
65C Commodore Lane
West Babylon NY, 11704
Phone: 631-321-5118
FAX: 631-321-5119
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