linux-kernel - Re: [patch] x86: make UV support optional

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Message-ID: <20090106150444.GI16738@wotan.suse.de>
Date:	Tue, 6 Jan 2009 16:04:44 +0100
From:	Nick Piggin <npiggin@...e.de>
To:	Mike Travis <travis@....com>
Cc:	Jack Steiner <steiner@....com>, tglx@...utronix.de,
	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	Cliff Wickman <cpw@....com>, Russ Anderson <rja@....com>
Subject: Re: [patch] x86: make UV support optional

On Tue, Jan 06, 2009 at 06:54:08AM -0800, Mike Travis wrote:
> Jack Steiner wrote:
> > On Tue, Jan 06, 2009 at 07:03:48AM +0100, Nick Piggin wrote:
> >> UV is fairly rare.... and much of the support is already there to cope with
> >> 32-bit builds. So this makes sense I think.
> >>
> > 
> > 
> > Looks ok to me. One suggestion though. There is a MAXSMP config
> > option. I would suggest enabling UV if MAXSMP is enabled. This
> > will help ensure that UV is tested more frequently & may minimize
> > regressions.
> > 
> > 
> > --- jack
> 
> Nick - would you add something like this to your patch?  Thanks! Mike
> ---
> Subject: x86: enable UV when MAXSMP is configured.
> 
> We want UV code to be tested even for non-UV architectures.  Enabling
> MAXSMP specifies "maximizing the system capabitlity" and UV is one of
> these methods.  Also helps distros select the correct config options
> for their default configurations.

I don't really follow. The config option I added is very visible and
clear, isn't it? I don't think MAXSMP means that, otherwise it would
basically be allyesconfig.

I wouldn't object to have a platform types menu like the processor
types one. Or a generic architecture checkbox to select some of
these things together.

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