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From: Doug Rabson <dfr@nlsystems.com>
To: John Baldwin <jhb@FreeBSD.org>
Date: Sun, 8 Aug 2004 10:28:44 +0100
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cc: cvs-src@FreeBSD.org
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cc: Scott Long <scottl@FreeBSD.org>
cc: cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/kern kern_switch.c
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On Friday 06 August 2004 18:46, John Baldwin wrote:
> On Friday 06 August 2004 12:05 pm, Scott Long wrote:
> > John Baldwin wrote:
> > > jhb         2004-08-06 15:49:44 UTC
> > >
> > >   FreeBSD src repository
> > >
> > >   Modified files:
> > >     sys/kern             kern_switch.c
> > >   Log:
> > >   Don't scare users with a warning about preemption being off
> > > when it isn't yet safe to have on by default.
> > >
> > >   Revision  Changes    Path
> > >   1.75      +2 -0      src/sys/kern/kern_switch.c
> >
> > I was actually hoping to leave this on as a reminder to get us to
> > fix the underlying problems, and only turning it off if absolutely
> > necessary for the release.  Sorry that I didn't mention this
> > sooner.
>
> Hmm, it seems at least one person on current@ was already confused by
> this and asking if he should turn on FULL_PREEMPTION instead.  We
> probably don't want people doing that. :-P  Also, believe me that I
> haven't forgotten about the preemption stability problems.  I just
> need to reproduce these problems on machines with a serial console. 
> The only machine I can reproduce hangs on so far is my laptop which
> has no serial port. :(

Does it have firewire? Dcons is dead easy to set up - just add dcons and 
dcons_crom to a kernel config and it automatically becomes the console.