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

[Paul Goyette <paul%whooppee.com@localhost>]

On Fri, 17 Feb 2012, Marc Balmer wrote:

> Am 17.02.12 14:16, schrieb Hubert Feyrer:
> > On Fri, 17 Feb 2012, Marc Balmer wrote:
> > > > I think NetBSD should add a stack trace on panics automatically...
> > >
> > > Can't that be achieved using ddb.commandonenter ?
> > > Or should a ddb.stacktrace sysctl variable be introduced for this?
> >
> > Whatever one, it should be on by default.
> > Each time we have to ask people to give us information, this is suboptimal.
>
> So what is the best way (I am now collecting opinions)?
>
> 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

Can we also get the per-CPU data by default?

Because of the number of commands that would be required, I would think 
that option 1 is best.

-------------------------------------------------------------------------
| Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:       |
| Customer Service | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com    |
| Network Engineer | 0786 F758 55DE 53BA 7731 | pgoyette at juniper.net |
| Kernel Developer |                          | pgoyette at netbsd.org  |
-------------------------------------------------------------------------