Date: Wed, 10 Aug 2011 15:22:52 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: <freebsd-stable@freebsd.org> Subject: debugging frequent kernel panics on 8.2-RELEASE Message-ID: <47F0D04ADF034695BC8B0AC166553371@multiplay.co.uk>
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We're currently experiencing a large number of kernel panics
on FreeBSD 8.2-RELEASE across a large number of machines here.
The base stack reported is a double fault with no additional
details and CTRL+ALT+ESC fails to break to the debugger as
does and NMI, even though it at least tries printing the
following many times some quite jumbled:-
NMI ... going to debugger
We've configured the dump device but that also seems to fail
to capture any details just sitting there after panic with
Dumping 4465MB:
The machines are single disk ZFS root install and the dump
device is configured using the gptid, could this be what's
preventing the dump happening?
The kernel is compiled with:-
options KDB # Kernel debugger related code
options KDB_TRACE # Print a stack trace for a panic
We have remove KVM but not remote serial on the most of the
machines.
Any advice on how to debug this issue?
Regards
Steve
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