Help with crashdump
wa1ter at myrealbox.com
Wed Mar 2 20:31:33 PST 2005
On Wed, 2 Mar 2005, Matthew Dillon wrote:
> Is your userland synchronized with your kernel?
Yes -- compiled at the same time.
> Is your /var/crash large enough to hold a memory dump? (at least as much free
> space as physical memory ?)
/var has tons of space. Swap is the same size as memory: half a gig.
> savecore /var/crash
I get 'savecore: no coredump', and nothing in /var/crash.
Yesterday's kernel reports this:
ad0: 76319MB <ST380021A> [155061/16/63] at ata0-master UDMA100
and yet when I force the dump from the kernel debugger I see a message
about ad0: DMA limited to UDMA33 because of an old-style cable.
(and DFly is installed on ad1 and the dumpdev is also on ad1).
When I start the dump from the debugger prompt I see this:
dev #ad/0x60009 offset 128
The old kernel reports this:
$ ls -l /dev/ad1s5b
crw-r----- 1 root operator 116, 0x00060009 Dec 18 12:57 /dev/ad1s5b
Device 1K-blocks Used Avail Capacity Type
/dev/ad1s5b 524160 0 524160 0% Interleaved
This all looks correct to me.
When the dump starts, I see an orderly series of numbers starting at 511
and working down to 0. The last few lines look approximately like this:
4 3 2 1 0 error2 0
rebooting in 15 seconds
I'm wondering about that 'error2' -- does this mean there was an error
during the dump?
Red herring(?): I'm running DFly from ad1s5a (a logical partition).
Everything has been working perfectly until this problem getting a
crashdump. Any chance this could be causing the confusion?
More information about the Bugs