Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753075AbZK2Uqd (ORCPT ); Sun, 29 Nov 2009 15:46:33 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752193AbZK2Uqd (ORCPT ); Sun, 29 Nov 2009 15:46:33 -0500 Received: from casper.infradead.org ([85.118.1.10]:34105 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752017AbZK2Uqc (ORCPT ); Sun, 29 Nov 2009 15:46:32 -0500 Date: Sun, 29 Nov 2009 12:47:31 -0800 From: Arjan van de Ven To: Michael Breuer Cc: Ingo Molnar , Peter Zijlstra , Thomas Gleixner , Len Brown , Arnaldo Carvalho de Melo , linux-kernel@vger.kernel.org Subject: Re: Problem? intel_iommu=off; perf top shows acpi_os_read_port as extremely busy Message-ID: <20091129124731.7d0c9b45@infradead.org> In-Reply-To: <4B11678D.8020601@majjas.com> References: <4B106CC0.4050406@majjas.com> <20091128071808.GA32183@elte.hu> <20091128094530.0ede7b1a@infradead.org> <4B11678D.8020601@majjas.com> Organization: Intel X-Mailer: Claws Mail 3.7.3 (GTK+ 2.16.6; i586-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 611 Lines: 18 On Sat, 28 Nov 2009 13:10:21 -0500 Michael Breuer wrote: > Ok - my only question then is why things appear so different with > intel_iommu enabled. something else is even more expensive then :0 -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org -- 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/