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Re: automatic stacktrace on panic, was: Re: Boot fail as kvm guest

On Fri, 17 Feb 2012, Andreas Gustafsson wrote:
1) Introduce a new sysctl ddb.stacktrace, which is on by default
2) Set ddb.commandonenter to 'bt' by default
3) Do it like OpenBSD and yell at the users in an all-capslock message

Whichever we choose, we should also make sure ddb is actually entered,
or that we get a stack trace whether ddb is entered or not.
Currently, your chances of getting a stack trace depend on whether the
the rc scripts have been run yet, because /etc/sysctl.conf sets

I think that's ortogonal - for a report, the user doesn't need DDB in the first place - he just needs the stack backtrace. Of course not entering DDB, printing stuff and the immediately rebooting is not useful, either...

 - Hubert

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