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Date: Wed, 9 Apr 2008 13:28:09 -0700
From: "Yinghai Lu" <yhlu.kernel@gmail.com>
To: "Ingo Molnar" <mingo@elte.hu>, "Eric W. Biederman" <ebiederm@xmission.com>
Subject: Re: [PATCH] x86_64: Change FIRST_SYSTEM_VECTOR to a variable.
Cc: "Alan Mayer" <ajm@sgi.com>, torvalds@linux-foundation.org,
       "linux-kernel list" <linux-kernel@vger.kernel.org>
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References: <Pine.SGI.3.96.1080408160826.8706317D-100000@fergus.americas.sgi.com>
	 <20080409145945.GB17100@elte.hu>
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On Wed, Apr 9, 2008 at 7:59 AM, Ingo Molnar <mingo@elte.hu> wrote:
>
>  * Alan Mayer <ajm@sgi.com> wrote:
>
>  > Subject: [PATCH] x86_64: Change FIRST_SYSTEM_VECTOR to a variable.
>  >
>  > From: Alan Mayer <ajm@sgi.com>
>  >
>  > The SGI UV system needs several more system vectors than a vanilla
>  > x86_64 system.  Rather than burden the other archs with extra system
>  > vectors that they don't use, change FIRST_SYSTEM_VECTOR to a variable,
>  > so that it can be dynamic.
>
>  nice - but please split this up into two patches: first one that changes
>  the generic code to use a variable limit - this patch will (should) be a
>  functional NOP.
>
>  then a second patch adds those two new UV vectors.
>
>  Also, could you please also change the 32-bit side as well so that we at
>  least keep the two implementations roughly in sync?
>

for x86_64, current from 0x20 to 0x2f, we only use one for irq migration.

wonder if you can use 2 from them for UV...

YH