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Re: question to those who know x86 irq vectors

To: Hugh Dickins <hugh@xxxxxxxxxxx>
Subject: Re: question to those who know x86 irq vectors
From: Jay Lan <jlan@xxxxxxx>
Date: Wed, 06 Aug 2008 12:23:21 -0700
Cc: KDB <kdb@xxxxxxxxxxx>
In-reply-to: <Pine.LNX.4.64.0808061959530.6852@xxxxxxxxxxx>
References: <4899ED43.6060306@xxxxxxx> <Pine.LNX.4.64.0808061959530.6852@xxxxxxxxxxx>
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Hugh Dickins wrote:
> On Wed, 6 Aug 2008, Jay Lan wrote:
>> KDB defines KDB_VECTOR for x86 machines
>>     #define KDB_VECTOR             0xfb for x86_64 systems,
>> and #define KDB_VECTOR             0xf9 for x86_32 systems.
>>
>> In 2.6.27-rc, unfortunately, 0xf9-0xff are all being used. Is it
>> safe for KDB to use 0xf8? The f0-f7 are used for TLB flush.
> 
> I've limited knowledge here, but yes, that works fine.

Thanks for your feedback, Hugh!

Mike Travis also wrote me:
: Alan Meyer has a new patch going in to assign vectors dynamically.
: That might be the way to go (at least for x86_64).

That sounds great. I will use 0xf8 for x86_64 for now.

Regards,
 - jay


> 
> Hugh
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