Date: Fri, 13 Sep 2002 18:54:11 +0100 From: "James C. Russell" <sasquatch@canuck.co.uk> To: freebsd-questions@freebsd.org Subject: trace from lockup under 4.6.2-release Message-ID: <20020913185411.5a422c82.sasquatch@canuck.co.uk>
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I've experienced several lockups under 4.6.0 and now 4.6.2. these have happened whilst running ogle, mplayer, xscreensaver, and xmms under X/wmaker. I've followed the developer-handbook section on kernel debugging to produce the following details. In each case the system stops responding to user input, caps lock & ctl-alt-backspace have no effect. Is this enough info to trace the fault? if not how should I proceed.
Thanks for any help!
- James
Checking for core dump: savecore: reboot after panic: vdrop: holdcnt
Sep 13 15:23:00 meanie savecore: reboot after panic: vdrop: holdcnt
savecore: system went down at Fri Sep 13 15:00:04 2002
savecore: /var/crash/bounds: No such file or directory
savecore: writing core to /var/crash/vmcore.0
savecore: writing kernel to /var/crash/kernel.0
meanie# cd /usr/src/sys/compile/MEANIE/
meanie# gdb -k
GNU gdb 4.18 (FreeBSD)
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 kernel.debug
Reading symbols from kernel.debug...done.
(kgdb) exec-file /var/crash/kernel.0
(kgdb) core-file /var/crash/vmcore.0
IdlePTD at phsyical address 0x00390000
initial pcb at physical address 0x002f4ba0
panicstr: vdrop: holdcnt
panic messages:
---
dmesg: kernel message buffer has different magic number
---
#0 dumpsys () at ../../kern/kern_shutdown.c:487
487 if (dumping++) {
(kgdb)
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