Date: Wed, 13 Dec 2006 21:39:43 -0800 From: Wes Peters <wes@opensail.org> To: Scott Long <scottl@samsco.org> Cc: cvs-all@FreeBSD.org, cvs-src@FreeBSD.org, src-committers@FreeBSD.org, mjacob@FreeBSD.org, "David E. O'Brien" <obrien@FreeBSD.org> Subject: Re: cvs commit: src/sys/amd64/conf GENERIC Message-ID: <DEEEA0CE-4480-4015-9F51-50D0F48E65F0@opensail.org> In-Reply-To: <4580DE4E.3080008@samsco.org> References: <200612140357.kBE3vY0Q053458@repoman.freebsd.org> <4580CD6A.5090802@samsco.org> <20061213201031.T26658@ns1.feral.com> <4580D3BB.7060504@samsco.org> <20061213210116.P26879@ns1.feral.com> <4580DE4E.3080008@samsco.org>
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On Dec 13, 2006, at 9:17 PM, Scott Long wrote:
> mjacob@freebsd.org wrote:
>>> There wasn't a full switchover to SMP at 6.0 because an SMP
>>> kernel on a
>>> UP system incurs a measurable runtime overhead, and we wanted to
>>> present
>>> a system that showed the best of FreeBSD to people who wanted to
>>> run it
>> But David's point is that most AMD64 boxes *are* SMP, not UP. Is
>> that wrong?
>
> 1. There are plenty of single core Opterons and Athlon64 chips
> still in
> service. Maybe AMD sells more SMP systems now than UP systems, but
> their prior sales of UP systems didn't magically disappear overnight.
>
> 2. The decision was made in spring of 2005, before dual core chips
> were
> widely used. While we knew that such chips would be available, we
> wanted to have consistency for the transition.
>
> 3. This change, had it not been reverted, would have broken the
> consistency in the major release stream that we were trying to
> achieve.
> You spell it 'POLA', I spell it 'consistent'. Either way, I think
> that
> we both have a deep concern and appreciation for doing the right thing
> and not pissing people off with surprises.
>
> 4. When 7.0 is released in 2007, the transition will be complete.
These are all fine points, Scott is right about everything *except*
calling David an idiot. David, who is not an idiot, politely backed
out the change. Please end this thread now.
--
Where am I, and what am I doing in this handbasket?
Wes Peters
wes@softweyr.com
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