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Date:      Sat, 09 Jul 2005 07:24:58 -0600
From:      Scott Long <scottl@samsco.org>
To:        John Baldwin <jhb@FreeBSD.org>
Cc:        rsh.lists@comcast.net, freebsd-current@FreeBSD.org, Adam K Kirchhoff <adamk@voicenet.com>
Subject:   Re: Portupgrade, -CURRENT & SMP
Message-ID:  <42CFD02A.6050204@samsco.org>
In-Reply-To: <200507090910.25502.jhb@FreeBSD.org>
References:  <42C098B0.5060004@voicenet.com> <42C342F7.9080905@comcast.net> <42C34640.6040305@samsco.org> <200507090910.25502.jhb@FreeBSD.org>

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John Baldwin wrote:
> 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.
> 

In order to do that I need to completely re-write it so that it does
simple scrolling instead of screen addressing, and of course I need
to remove the mascot.  The first part isn't easy and hence hasn't
been high on my priority list.

Scott



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