[prev in list] [next in list] [prev in thread] [next in thread] 

List:       netbsd-current-users
Subject:    Re: panic enabling ipfilter (Dec 27)
From:       Tom Ivar Helbekkmo <tih () hamartun ! priv ! no>
Date:       2016-12-29 4:56:02
Message-ID: m2pokbtjtp.fsf () thuvia ! hamartun ! priv ! no
[Download RAW message or body]

Geoff Wing <gcw@pobox.com> writes:

> Unfortunately my machine is mostly headless and I can't get dmesg saved
> after reboot.
> [...]
> Is "bt;sync" better?

If you want the dmesg output, you do want the core dump:

# dmesg -N /var/crash/netbsd.42 -M /var/crash/netbsd.42.core

...and for backtraces after the fact (your path will vary):

# gdb /sys/arch/amd64/compile/obj.amd64/GENERIC/netbsd.gdb
(gdb) target kvm /var/crash/netbsd.42.core
(gdb) bt

-tih
-- 
Most people who graduate with CS degrees don't understand the significance
of Lisp.  Lisp is the most important idea in computer science.  --Alan Kay
[prev in list] [next in list] [prev in thread] [next in thread]