From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751822AbWCHRz3 (ORCPT ); Wed, 8 Mar 2006 12:55:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751825AbWCHRz2 (ORCPT ); Wed, 8 Mar 2006 12:55:28 -0500 Received: from smtp2.Stanford.EDU ([171.67.16.125]:62119 "EHLO smtp2.Stanford.EDU") by vger.kernel.org with ESMTP id S1751822AbWCHRz0 (ORCPT ); Wed, 8 Mar 2006 12:55:26 -0500 Subject: Re: [Alsa-devel] Re: 2.6.15-rt18, alsa sequencer, rosegarden -> alsa hangs From: Fernando Lopez-Lezcano To: Ingo Molnar Cc: nando@ccrma.Stanford.EDU, karsten wiese , Takashi Iwai , linux-kernel@vger.kernel.org, alsa-devel@lists.sourceforge.net, cc@ccrma.Stanford.EDU In-Reply-To: <20060308140635.GA16972@elte.hu> References: <1141800836.6150.3.camel@cmn3.stanford.edu> <20060308133635.96547.qmail@web26507.mail.ukl.yahoo.com> <20060308140635.GA16972@elte.hu> Content-Type: text/plain Date: Wed, 08 Mar 2006 09:54:59 -0800 Message-Id: <1141840499.5262.8.camel@cmn3.stanford.edu> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2006-03-08 at 15:06 +0100, Ingo Molnar wrote: > * karsten wiese wrote: > > > ALSA Midi sequencer uses tasklets. there are 2 kinds of > > them: lo and hi. > > In rt-18 PREEMPT-RT, tasklet_hi_schedule() didn't work, > > 'cause it woke up tasklet_lo's thread. > > Thats what my patch fixed. > > ah - i thought that -rt18 had your fix already - but indeed it's -rt19 > that added it. So it's probably the same bug. I agree, I just booted into -rt20 and the problem seems to be gone. Let me know if you still want the trace, I can always boot again into the buggy kernel. Thanks for the help! -- Fernando