I've got a 6.1 server that's panicing and I'd like to debug it. The problem is that I can't get a kernel dump on to my gmirror device. It looks like since 6.1 this has been supported (it says so in the release notes). In my rc.conf I have:
dumpdev="/dev/mirror/gm0s1b"$a
Which is my swap partition. On booting it says:
kernel dumps on /dev/mirror/gm0s1b
But when it panics it says:
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x14
fault code = supervisor write, page not present
instruction pointer = 0x20:0xc057ff9f
stack pointer = 0x28:0xe2df3c44
frame pointer = 0x28:0xe2df3c4c
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 = 13 (swi4: clock sio)
trap number = 12
panic: page fault
Uptime: 1d4h15m55s
GEOM_MIRROR: Device gm0: provider mirror/gm0 destroyed.
GEOM_MIRROR: Device gm0 destroyed.
Cannot dump. No dump device defined.
Automatic reboot in 15 seconds - press a key on the console to abort
Rebooting...
I'm guessing it's because the GEOM_MIRROR device has been destroyed just
before it wants to dump? Any suggestions on a way forward to getting a
dump out?
Thanks,
Tim.
--
Tim Bishop
http://www.bishnet.net/tim/
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