On Wednesday, 8. December 2004 12:20, Robert Watson wrote: > On Tue, 7 Dec 2004, Michael Nottebrock wrote: > > I recently enabled SW_WATCHDOG in my kernel, but when watchdog triggers > > a panic, no crashdump is taken although dumps are enabled. What could be > > causing this? > > If you drop to the debugger by using the debug.kdb.enter sysctl, and do > "call doadump", followed by a reset, does a dump get generated > successfully?
I don't have kdb enabled in my kernel configuration at all...
> I.e., are they completely broken on your system, or is this
> somehow a property of the particular hang you're seeing.
See my other mail, a different (non-watchdog) panic didn't trigger a dump
either. I even had the panic message in dmesg:
kernel trap 12 with interrupts disabled
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x14c
fault code = supervisor write, page not present
instruction pointer = 0x8:0xc0521397
stack pointer = 0x10:0xe9794b84
frame pointer = 0x10:0xe9794b90
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = resume, IOPL = 0
current process = 1281 (beep-media-player)
trap number = 12
panic: page fault
Syncing disks, vnodes remaining...4 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0
(I enabled kern.sync_on_panic only very recently for my experimenting with
watchdog, dumping didn't work without it either).
--
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