Date: Thu, 20 Dec 2001 08:39:16 -0500 From: "Robin P. Blanchard" <Robin_Blanchard@gactr.uga.edu> To: stable@freebsd.org Subject: help debugging kernel Message-ID: <3C21EA04.D000E3FC@gactr.uga.edu>
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I have an SMP box that keeps signal 12-ing. So I built a debug kernel
with:
makeoptions DEBUG=-g #Build kernel with gdb(1) debug
symbols
options DDB
#options DDB_UNATTENDED
options KTRACE #kernel tracing
options INVARIANTS
options INVARIANT_SUPPORT
options DIAGNOSTIC
options MAXMEM="(128*1024)" #limit mem usage to accomodate dump
Now when the box faults, I get:
panic: vm_page_unhold: hold count < 0 !!!
mp_lock = 00000001; cpuid = 0 ; 1apic.id = 01000000
and it's waiting at the DDB> prompt.
I type 'panic' to induce the dump at it reports:
device does not support dump routine.
What am I doing wrong here?
except from rc.conf:
dumpdev="/dev/amrd0s1b"
dumpdir="/usr/local/var/adm/crash"
savecore="YES"
# swapinfo
Device 1K-blocks Used Avail Capacity Type
/dev/amrd0s1b 524160 0 524160 0% Interleaved
# df -h
Filesystem Size Used Avail Capacity Mounted
on
/dev/amrd0s1a 124M 75M 39M 65% /
/dev/amrd0s1e 124M 4.5M 110M 4% /tmp
/dev/amrd0s1g 1.9G 255M 1.5G 14% /usr
/dev/amrd0s1h 5.3G 34M 4.9G 1%
/usr/local
/dev/amrd0s1f 124M 18M 96M 16% /var
procfs 4.0K 4.0K 0B 100% /proc
# sysctl -a |grep dump
kern.dumpdev: { major = 133, minor = 0x20001 }
kern.sugid_coredump: 0
kern.coredump: 1
machdep.do_dump: 1
Thanks in advance.
--
------------------------------------
Robin P. Blanchard
IT Program Specialist
Georgia Center for Continuing Ed.
fon: 706.542.2404 fax: 706.542.6546
email: Robin_Blanchard@gactr.uga.edu
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