From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756908AbYGJXod (ORCPT ); Thu, 10 Jul 2008 19:44:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751559AbYGJXoY (ORCPT ); Thu, 10 Jul 2008 19:44:24 -0400 Received: from mga10.intel.com ([192.55.52.92]:43762 "EHLO fmsmga102.fm.intel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751052AbYGJXoY (ORCPT ); Thu, 10 Jul 2008 19:44:24 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.30,341,1212390000"; d="scan'208";a="589692007" Date: Thu, 10 Jul 2008 19:37:33 -0400 From: Yong Wang To: "Eric W. Biederman" Cc: Suresh Siddha , mingo@elte.hu, hpa@zytor.com, tglx@linutronix.de, akpm@linux-foundation.org, arjan@linux.intel.com, andi@firstfloor.org, jbarnes@virtuousgeek.org, steiner@sgi.com, linux-kernel@vger.kernel.org Subject: Re: [patch 26/26] x64, x2apic/intr-remap: introduce CONFIG_INTR_REMAP Message-ID: <20080710233733.GA21085@ywang-dev> References: <20080710181634.764954000@linux-os.sc.intel.com> <20080710182239.635284000@linux-os.sc.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 > Is it possible to run in x2apic mode without running in interrupt remapping mode? > Just send the irqs directly to the cpu? It feels like it should be if an iommu > doesn't get in the way. > Yes, it is possible to run in x2apic mode without intr-remap. However, the extended cpu addressability will not be fully utilized that way.