Date: Sun, 8 Aug 2004 10:28:44 +0100 From: Doug Rabson <dfr@nlsystems.com> To: John Baldwin <jhb@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/kern kern_switch.c Message-ID: <200408081028.44760.dfr@nlsystems.com> In-Reply-To: <200408061340.15480.jhb@FreeBSD.org> References: <200408061549.i76Fni3I019460@repoman.freebsd.org> <4113AC45.1050003@freebsd.org> <200408061340.15480.jhb@FreeBSD.org>
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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.
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