Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757919AbYC1XFV (ORCPT ); Fri, 28 Mar 2008 19:05:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755112AbYC1XFG (ORCPT ); Fri, 28 Mar 2008 19:05:06 -0400 Received: from mga02.intel.com ([134.134.136.20]:62446 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755353AbYC1XFF convert rfc822-to-8bit (ORCPT ); Fri, 28 Mar 2008 19:05:05 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.25,572,1199692800"; d="scan'208";a="362432325" X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT Subject: RE: 2.6.25 regression: powertop says 120K wakeups/sec Date: Fri, 28 Mar 2008 16:07:07 -0700 Message-ID: <924EFEDD5F540B4284297C4DC59F3DEEC83E9A@orsmsx423.amr.corp.intel.com> In-Reply-To: <200803290001.18912.rjw@sisk.pl> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: 2.6.25 regression: powertop says 120K wakeups/sec Thread-Index: AciRJ8N+bWoBADKBQiiWqTYzodxLgwAAG0/A References: <20080322202454.9D69DCC0EF@adsl-69-226-248-13.dsl.pltn13.pacbell.net> <200803281509.23107.david-b@pacbell.net> <20080328225604.GA7136@linux-os.sc.intel.com> <200803290001.18912.rjw@sisk.pl> From: "Pallipadi, Venkatesh" To: "Rafael J. Wysocki" Cc: "David Brownell" , "Andrew Morton" , , , "Len Brown" X-OriginalArrivalTime: 28 Mar 2008 23:05:04.0331 (UTC) FILETIME=[287191B0:01C89128] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1840 Lines: 61 >-----Original Message----- >From: linux-acpi-owner@vger.kernel.org >[mailto:linux-acpi-owner@vger.kernel.org] On Behalf Of Rafael >J. Wysocki >Sent: Friday, March 28, 2008 4:01 PM >To: Pallipadi, Venkatesh >Cc: David Brownell; Andrew Morton; >linux-kernel@vger.kernel.org; linux-acpi@vger.kernel.org; Len Brown >Subject: Re: 2.6.25 regression: powertop says 120K wakeups/sec > >On Friday, 28 of March 2008, Venki Pallipadi wrote: >> On Fri, Mar 28, 2008 at 03:09:22PM -0700, David Brownell wrote: >> > On Friday 28 March 2008, Pallipadi, Venkatesh wrote: >> > > You should have a dmesg line which looks like >> > > ACPI: CPU0 (power states: C1[C1] C2[C2] >> > > Do you see C2 in such line? >> > >> > Yes: >> > >> > ACPI: CPU0 (power states: C1[C1] C2[C2]) >> >> >> David, >> >> I think I figured out the bug... >> >> Can you try the below patch and confirm that it works (over >upstream - ignore >> the earlier revert patch I sent to you). >> >> Thanks, >> Venki >> >> ---- >> >> >> Patch to fix huge number of wakeups reported due to recent changes in >> processor_idle.c. The problem was that the entry_method >determination was >> broken due to one of the recent commits (bc71bec91f987) causing >> C1 entry to not to go to halt. This should also fix the hang >reported here. >> http://bugzilla.kernel.org/show_bug.cgi?id=10093 > >Ah, thanks for figuring that out. As a regression fix, it >should go upstream >ASAP, I think. > Lets just wait for confirmation from either David or in bug #10093. Yes. Once we get that confirmation this should go upstream. Thanks, Venki -- 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/