Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757972AbYGJUcQ (ORCPT ); Thu, 10 Jul 2008 16:32:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753002AbYGJUcA (ORCPT ); Thu, 10 Jul 2008 16:32:00 -0400 Received: from out01.mta.xmission.com ([166.70.13.231]:40385 "EHLO out01.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751653AbYGJUcA (ORCPT ); Thu, 10 Jul 2008 16:32:00 -0400 From: ebiederm@xmission.com (Eric W. Biederman) To: Jeremy Fitzhardinge Cc: Mike Travis , "H. Peter Anvin" , Arjan van de Ven , Ingo Molnar , Andrew Morton , Christoph Lameter , Jack Steiner , linux-kernel@vger.kernel.org, Rusty Russell References: <20080709165129.292635000@polaris-admin.engr.sgi.com> <20080709200757.GD14009@elte.hu> <48751B57.8030605@goop.org> <20080709133958.612635f0@infradead.org> <4875231F.1020506@zytor.com> <487524A0.6020304@goop.org> <487529AE.3060505@zytor.com> <48753A71.2030006@zytor.com> <48763732.7020805@sgi.com> <48765B03.6020905@goop.org> <48766967.7040008@goop.org> Date: Thu, 10 Jul 2008 13:25:33 -0700 In-Reply-To: <48766967.7040008@goop.org> (Jeremy Fitzhardinge's message of "Thu, 10 Jul 2008 12:56:23 -0700") Message-ID: User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/21.4 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-SA-Exim-Connect-IP: 24.130.11.59 X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-DCC: XMission; sa03 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: ;Jeremy Fitzhardinge X-Spam-Relay-Country: X-Spam-Report: * -1.8 ALL_TRUSTED Passed through trusted hosts only via SMTP * 0.0 T_TM2_M_HEADER_IN_MSG BODY: T_TM2_M_HEADER_IN_MSG * -0.2 BAYES_40 BODY: Bayesian spam probability is 20 to 40% * [score: 0.2065] * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa03 1397; Body=1 Fuz1=1 Fuz2=1] * 0.0 XM_SPF_Neutral SPF-Neutral Subject: Re: [RFC 00/15] x86_64: Optimize percpu accesses X-SA-Exim-Version: 4.2 (built Thu, 03 Mar 2005 10:44:12 +0100) X-SA-Exim-Scanned: Yes (on mgr1.xmission.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 783 Lines: 17 Jeremy Fitzhardinge writes: > Secondly, I depend on it. I register a percpu structure with Xen to share > per-vcpu specific information (interrupt mask, time info, runstate stats, etc). Note. That I expect at least something like this is interesting in the context per cpu device queues. However except possibly for Xen that implies allocating DMA addressable memory and going through that API, which will keep device drivers from using per cpu memory that way even if the allocating something for each cpu? Eric -- 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/