Message-ID: <492E7D91.10407@redhat.com>
Date: Thu, 27 Nov 2008 12:59:29 +0200
From: Avi Kivity <avi@redhat.com>
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To: Andi Kleen <andi@firstfloor.org>
CC: "H. Peter Anvin" <hpa@zytor.com>,
       Alexander van Heukelum <heukelum@fastmail.fm>, lguest@ozlabs.org,
       jeremy@xensource.com, LKML <linux-kernel@vger.kernel.org>,
       Mike Travis <travis@sgi.com>, Cyrill Gorcunov <gorcunov@gmail.com>,
       Steven Rostedt <srostedt@redhat.com>, Ingo Molnar <mingo@elte.hu>,
       Alexander van Heukelum <heukelum@mailshack.com>,
       Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [Lguest] [PATCH RFC/RFB] x86_64,	i386: interrupt dispatch changes
References: <20081104122839.GA22864@mailshack.com> <20081104150729.GC21470@localhost> <20081104170501.GE29626@one.firstfloor.org> <1225822006.21441.1282961299@webmail.messagingengine.com> <20081104204400.GC10825@elte.hu> <1226243805.27361.1283784629@webmail.messagingengine.com> <49178E89.2000307@zytor.com> <492DC13F.8020009@redhat.com> <492DE3EF.8060507@zytor.com> <492E72D7.9060201@redhat.com> <20081127105635.GG6703@one.firstfloor.org>
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Andi Kleen wrote:
>> Nice.  Can actually go to zero, by pointing the IDT at (unmapped_area + 
>> vector), and deducing the vector in the page fault handler from cr2.
>>     
>
> That would be still one byte, otherwise you wouldn't get a unique index.
>   

One virtual byte; zero physical bytes.  unmapped_area above need not be 
mapped.

-- 
error compiling committee.c: too many arguments to function

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