Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756767AbYKERxk (ORCPT ); Wed, 5 Nov 2008 12:53:40 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756556AbYKERx0 (ORCPT ); Wed, 5 Nov 2008 12:53:26 -0500 Received: from nf-out-0910.google.com ([64.233.182.185]:36790 "EHLO nf-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756531AbYKERxY (ORCPT ); Wed, 5 Nov 2008 12:53:24 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=NGlz9FeRQfnvLSMdb/Ovseb+u/Ep59u/0gqnBFjVsuD87kf1+WnZqytu17lqfdF6dG zMSog5p3DDw56787xvDDwR5TusQC0ghfrAAUZk9Td7ogcwlfdlZbVJyflP/w2n7otS5T agliLoIxY3aNQ6gLfVGZKz5ls3moNaUMFmo1A= Date: Wed, 5 Nov 2008 20:53:18 +0300 From: Cyrill Gorcunov To: Ingo Molnar Cc: "H. Peter Anvin" , Alexander van Heukelum , Andi Kleen , Alexander van Heukelum , LKML , Thomas Gleixner , lguest@ozlabs.org, jeremy@xensource.com, Steven Rostedt , Mike Travis Subject: Re: [PATCH RFC/RFB] x86_64, i386: interrupt dispatch changes Message-ID: <20081105175318.GD7286@localhost> References: <20081104122839.GA22864@mailshack.com> <20081104150729.GC21470@localhost> <20081104170501.GE29626@one.firstfloor.org> <1225822006.21441.1282961299@webmail.messagingengine.com> <20081104204400.GC10825@elte.hu> <20081104212933.GA11050@elte.hu> <4910C014.9070805@zytor.com> <20081104215245.GC17775@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20081104215245.GC17775@elte.hu> User-Agent: Mutt/1.5.17+20080114 (2008-01-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1247 Lines: 41 [Ingo Molnar - Tue, Nov 04, 2008 at 10:52:45PM +0100] | | * H. Peter Anvin wrote: | | > Ingo Molnar wrote: | > > * Ingo Molnar wrote: | > > | > >> And as hpa's comments point it out, compressing the rather stupid | > >> irq stubs might be a third option that looks promising as well. | > > | > > ... and we should try and see how far we can compress those stubs, | > > before we do any segment register based tricks. | > > | > | > Using the techniques previously mentioned, for 224 vectors: | > | > 1792 bytes ( 8 bytes/stub) - trivial. | > 1568 bytes ( 7 bytes/stub) - same without alignment. | > 952 bytes (~4 bytes/stub) - extra jump needed. | > | > For comparison, the IDT itself is 2048 bytes on x86-32 and 4096 bytes on | > x86-64. | | sounds like a plan :) | | Ingo | Ingo, what the conclusion is? As I understand from the thread -- 1) Implement Peter's proposed cleanup/compress. 2) Test Alexander's patche. Did I miss something? - Cyrill - -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/