Portupgrade, -CURRENT & SMP

[John Baldwin]

On Wednesday 29 June 2005 09:09 pm, Scott Long wrote:
> Sean wrote:
> > Scott Long wrote:
> >>> Which, yes, is quite annoying and, IMHO, is a pretty critical bug
> >>> that needs fixing.  It makes SMP on -CURRENT nearly unusable if you
> >>> want to regularly update your ports.
> >>>
> >>> Adam
> >>
> >> Well, you can disable SMP at boot via
> >>
> >> set hw.apic.0.disable=1
> >>
> >> But yes, it's some sort of a bug and it needs to be fixed.  I'll track
> >> the PR.
> >>
> >> Scott
> >
> > Scott,
> >
> > I checked and doing several searches through the sysctl options do not
> > see any such option as you list above, > set hw.apic.0.disable=1
> >
> > I am running amd64, is this perhaps just an option for i386?
> > I do see a kern.smp.disabled: 0, would this instead be for amd64?
> >
> > Exactly how on boot do I break in to enter this option?
> > Or do I set it, then boot?
> > Then afterwards reset then boot again?
> >
> >             Thanks
> >             Sean
>
> Sorry, it's
>
> hw.apic.0.disabled=1
>
> I missed the 'd'.  It's not a sysctl, it's a tunable (they share the
> same namespace and often overlap, but not always).  kern.smp.disabled
> works too.  You'll need to either put these settings into
> /boot/loader.conf, or manually set them in the loader by hitting the
> space bar during the 10 second timeout.  5.x had a nice menu for doing
> this, but it because controversial over silly reasons and was removed.

And s/hw/hint/.  I think the menu should be brought back though.  The folks 
who didn't want it had an easy knob to turn it off.

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org