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From: Ingo Molnar <mingo@elte.hu>
To: Jack Steiner <steiner@sgi.com>
Cc: Andi Kleen <andi@firstfloor.org>,
	tglx@linutronix.de, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Subject: Re: [RFC 8/8] x86_64: Support for new UV apic
Date: Wed, 26 Mar 2008 08:38:23 +0100	[thread overview]
Message-ID: <20080326073823.GD3442@elte.hu> (raw)
In-Reply-To: <20080325175657.GA6262@sgi.com>


* Jack Steiner <steiner@sgi.com> wrote:

> > > -        obj-y				+= genapic_64.o genapic_flat_64.o
> > > +        obj-y				+= genapic_64.o genapic_flat_64.o genx2apic_uv_x.o
> > 
> > Definitely should be a CONFIG
> 
> Not sure that I understand why. The overhead of UV is minimal & we 
> want UV enabled in all distro kernels. OTOH, small embedded systems 
> probably want to eliminate every last bit of unneeded code.
> 
> Might make sense to have a config option. Thoughts????

i wouldnt mind having UV enabled by default (it can be a config option 
but default-enabled on generic kernels so all distros will pick this hw 
support up), but we definitely need the genapic unification before we 
can add more features.

	Ingo

WARNING: multiple messages have this Message-ID (diff)
From: Ingo Molnar <mingo@elte.hu>
To: Jack Steiner <steiner@sgi.com>
Cc: Andi Kleen <andi@firstfloor.org>,
	tglx@linutronix.de, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Subject: Re: [RFC 8/8] x86_64: Support for new UV apic
Date: Wed, 26 Mar 2008 08:38:23 +0100	[thread overview]
Message-ID: <20080326073823.GD3442@elte.hu> (raw)
In-Reply-To: <20080325175657.GA6262@sgi.com>

* Jack Steiner <steiner@sgi.com> wrote:

> > > -        obj-y				+= genapic_64.o genapic_flat_64.o
> > > +        obj-y				+= genapic_64.o genapic_flat_64.o genx2apic_uv_x.o
> > 
> > Definitely should be a CONFIG
> 
> Not sure that I understand why. The overhead of UV is minimal & we 
> want UV enabled in all distro kernels. OTOH, small embedded systems 
> probably want to eliminate every last bit of unneeded code.
> 
> Might make sense to have a config option. Thoughts????

i wouldnt mind having UV enabled by default (it can be a config option 
but default-enabled on generic kernels so all distros will pick this hw 
support up), but we definitely need the genapic unification before we 
can add more features.

	Ingo

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  parent reply	other threads:[~2008-03-26  7:38 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-24 18:21 [RFC 8/8] x86_64: Support for new UV apic Jack Steiner
2008-03-24 18:21 ` Jack Steiner
2008-03-25 10:25 ` Andi Kleen
2008-03-25 10:25   ` Andi Kleen
2008-03-25 17:56   ` Jack Steiner
2008-03-25 17:56     ` Jack Steiner
2008-03-25 18:06     ` Andi Kleen
2008-03-25 18:06       ` Andi Kleen
2008-03-26  2:23       ` Jeremy Fitzhardinge
2008-03-26  2:23         ` Jeremy Fitzhardinge
2008-03-26  3:22         ` Glauber Costa
2008-03-26  3:22           ` Glauber Costa
2008-03-26  7:29         ` Ingo Molnar
2008-03-26  7:29           ` Ingo Molnar
2008-03-26  7:38     ` Ingo Molnar [this message]
2008-03-26  7:38       ` Ingo Molnar
2008-03-30 20:23       ` Yinghai Lu
2008-03-30 20:23         ` Yinghai Lu
2008-03-30 21:03         ` Jack Steiner
2008-03-30 21:03           ` Jack Steiner
2008-03-30 21:18           ` Andi Kleen
2008-03-30 21:18             ` Andi Kleen
2008-03-30 23:29             ` Yinghai Lu
2008-03-30 23:29               ` Yinghai Lu
2008-03-31  2:18               ` Jack Steiner
2008-03-31  2:18                 ` Jack Steiner
2008-03-31  2:20                 ` Yinghai Lu
2008-03-31  2:20                   ` Yinghai Lu
2008-03-31 12:33                   ` Ingo Molnar
2008-03-31 12:33                     ` Ingo Molnar
2008-03-31 12:52                     ` Andi Kleen
2008-03-31 12:52                       ` Andi Kleen
2008-03-31 18:42                     ` Yinghai Lu
2008-03-31 18:42                       ` Yinghai Lu
2008-03-31  6:48               ` Andi Kleen
2008-03-31  6:48                 ` Andi Kleen
2008-03-25 14:30 ` Ingo Molnar
2008-03-25 14:30   ` Ingo Molnar
2008-03-25 16:31   ` Jack Steiner
2008-03-25 16:31     ` Jack Steiner
2008-03-26  3:24     ` Glauber Costa
2008-03-26  3:24       ` Glauber Costa
2008-03-30 20:41 ` Yinghai Lu
2008-03-30 20:41   ` Yinghai Lu
2008-03-30 21:08   ` Jack Steiner
2008-03-30 21:08     ` Jack Steiner
2008-03-30 23:24     ` Yinghai Lu
2008-03-30 23:24       ` Yinghai Lu

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