linux-kernel - Re: Comments on UV tlb flushing

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Message-ID: <20080729173420.GA18296@sgi.com>
Date:	Tue, 29 Jul 2008 12:34:20 -0500
From:	Cliff Wickman <cpw@....com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Nick Piggin <nickpiggin@...oo.com.au>, steiner@....com,
	mingo@...e.hu, linux-kernel@...r.kernel.org
Subject: Re: Comments on UV tlb flushing

On Tue, Jul 29, 2008 at 07:43:39AM -0700, Jeremy Fitzhardinge wrote:
> Cliff Wickman wrote:
>> I think that the Linux distributions are not going to build a special
>> UV kernel, are they?  So every distro would have to be prompted to  
>> turn on CONFIG_X86_UV, or else their kernel is not going to boot on UV.
>>   
>
> Distros will generally turn on everything.  You could have it on by  
> default if the kernel is built for CONFIG_X86_GENERICARCH which enables  
> support for other big numa configurations.  I think distros generally  
> build with that enabled anyway.
>
>    J

I don't know much about x86 configuration options.  It looks like
CONFIG_X86_GENERICARCH is fairly new, so I don't know where to look
for samples of how it will be set by RH and SuSE.

But if the tlb_uv.o code should be present in "every" distro x86 kernel
I don't see the point of having to configure it in.  Why not just
configure it out for small (embedded) kernels?

-Cliff
-- 
Cliff Wickman
Silicon Graphics, Inc.
cpw@....com
(651) 683-3824
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