Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751904AbZLVJR2 (ORCPT ); Tue, 22 Dec 2009 04:17:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751001AbZLVJR1 (ORCPT ); Tue, 22 Dec 2009 04:17:27 -0500 Received: from cantor.suse.de ([195.135.220.2]:56317 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750956AbZLVJR0 (ORCPT ); Tue, 22 Dec 2009 04:17:26 -0500 Date: Tue, 22 Dec 2009 10:17:25 +0100 Message-ID: From: Takashi Iwai To: =?UTF-8?B?w4lyaWM=?= Piel Cc: Maciej Rutecki , Linux Kernel Mailing List , alsa-devel@alsa-project.org, perex@perex.cz, "Rafael J. Wysocki" Subject: Re: [2.6.33-rc1] [SOUND] HDA: high cpu usage, noise In-Reply-To: <4B308E28.1090609@tremplin-utc.net> References: <8db1092f0912200927y7cdab36ftd1f73d56cd89763f@mail.gmail.com> <8db1092f0912211012mcdd6639oaaf0bddc118e7d66@mail.gmail.com> <4B2FC7B2.7000001@tremplin-utc.net> <4B308E28.1090609@tremplin-utc.net> User-Agent: Wanderlust/2.15.6 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.7 Emacs/23.1 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1100 Lines: 33 At Tue, 22 Dec 2009 10:15:20 +0100, Éric Piel wrote: > > Op 22-12-09 08:04, Takashi Iwai schreef: > > At Mon, 21 Dec 2009 20:08:34 +0100, > > Éric Piel wrote: > : > >> Could it be coming from this timeout? > > > > It shouldn't. The polling mode doesn't give any behavioral change, > > and the CPU usage can't be that high. > > > > Try is to pass bdl_pos_adj=0 option. This should reduce the CPU hog, > > at least. But it doesn't mean it's the right fix... > I'll try > > > > > Another thing to try is to replace the whole HD-audio stack with the > > last working one (was it 2.6.32?), and check whether it works with > > 2.6.32 core. > Could you give more details on how to do this? > Does it consist in taking the sound/ directory of 2.6.32 and copying it > over 2.6.33-rc1 ? Or less files? I'd try first only sound/pci/hda/* files. Takashi -- 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/