debugging frequent kernel panics on 8.2-RELEASE
killing at multiplay.co.uk
Wed Aug 10 14:33:50 UTC 2011
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
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
Any advice on how to debug this issue?
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