Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756580AbYLGWya (ORCPT ); Sun, 7 Dec 2008 17:54:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753594AbYLGWyU (ORCPT ); Sun, 7 Dec 2008 17:54:20 -0500 Received: from ogre.sisk.pl ([217.79.144.158]:35231 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753310AbYLGWyT (ORCPT ); Sun, 7 Dec 2008 17:54:19 -0500 From: "Rafael J. Wysocki" To: Arjan van de Ven Subject: Re: [Bug #12152] Huge wakeups number from i1915 Date: Sun, 7 Dec 2008 23:52:06 +0100 User-Agent: KMail/1.9.9 Cc: Linux Kernel Mailing List , Kernel Testers List , "Yves-Alexis Perez" References: <6VnlupFpCsN.A.2rE.MsEPJB@chimera> <07Xes05z25M.A.VtF.ksEPJB@chimera> <20081207145203.0f998d5b@infradead.org> In-Reply-To: <20081207145203.0f998d5b@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200812072352.07151.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1281 Lines: 34 On Sunday, 7 of December 2008, Arjan van de Ven wrote: > On Sun, 7 Dec 2008 21:32:54 +0100 (CET) > "Rafael J. Wysocki" wrote: > > > This message has been generated automatically as a part of a report > > of recent regressions. > > > > The following bug entry is on the current list of known regressions > > from 2.6.27. Please verify if it still should be listed and let me > > know (either way). > > > > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12152 > > Subject : Huge wakeups number from i1915 > > Submitter : Yves-Alexis Perez > > Date : 2008-12-02 16:48 (6 days old) > > References : > > http://marc.info/?l=linux-acpi&m=122823656702994&w=4 > > > > at least in some of the cases where this has been seen the cause is the > following: > The i915 DRM driver used to do polling for completion, busy waiting. It > moved to be interrupt driven, which is usually better for power, but it > will show up as more wakeups in powertop.... IOW, this is not a regression? Rafael -- 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/