Subject: Dump device for diskless machine
To: None <firstname.lastname@example.org>
From: Joe Landers <email@example.com>
Date: 06/02/2001 10:27:03
I'm trying to debug a kernel panic on MIPS-based diskless machine.
It would be great if I could get crash dump for later analysis with
kgdb, but I haven't been able to figure out how to configure a
dump device for this configuration.
My fstab entries for the filesystem and swap are:
host:/usr/export/root / nfs rw 0 0
host:/usr/export/swap none swap sw,nfsmntpt=/swap 0 0
which work fine. I can get the machine up into multiuser and
reliably panic the system. I've tried adding to fstab:
host:/usr/export/dump none swap dp,nfsmntpt=/dump 0 0
but the mount fails. Since it's diskless, I don't have any block
devices that I can configure manually with 'swapctl -D'.
Can I configure a diskless system to do a crash dump? How?