linux-kernel - Re: [PATCH] x86_64: Change FIRST_SYSTEM

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Date:	Wed, 9 Apr 2008 13:28:09 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Ingo Molnar" <mingo@...e.hu>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	"Alan Mayer" <ajm@....com>, torvalds@...ux-foundation.org,
	"linux-kernel list" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86_64: Change FIRST_SYSTEM_VECTOR to a variable.

On Wed, Apr 9, 2008 at 7:59 AM, Ingo Molnar <mingo@...e.hu> wrote:
>
>  * Alan Mayer <ajm@....com> wrote:
>
>  > Subject: [PATCH] x86_64: Change FIRST_SYSTEM_VECTOR to a variable.
>  >
>  > From: Alan Mayer <ajm@....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
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