From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932557AbaFDGtM (ORCPT ); Wed, 4 Jun 2014 02:49:12 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:47378 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754659AbaFDGtK (ORCPT ); Wed, 4 Jun 2014 02:49:10 -0400 Date: Wed, 4 Jun 2014 08:48:52 +0200 From: Peter Zijlstra To: Lai Jiangshan Cc: jjherne@linux.vnet.ibm.com, Sasha Levin , Tejun Heo , LKML , Dave Jones , Ingo Molnar , Thomas Gleixner , Steven Rostedt Subject: Re: workqueue: WARN at at kernel/workqueue.c:2176 Message-ID: <20140604064852.GE30445@twins.programming.kicks-ass.net> References: <53739F3B.4060608@linux.vnet.ibm.com> <53758B12.8060609@cn.fujitsu.com> <20140516115737.GP11096@twins.programming.kicks-ass.net> <20140516162945.GZ11096@twins.programming.kicks-ass.net> <53849EB7.9090302@linux.vnet.ibm.com> <20140527142637.GB19143@laptop.programming.kicks-ass.net> <53875F09.3090607@linux.vnet.ibm.com> <538DB076.4090704@cn.fujitsu.com> <538E8462.80309@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="mVyWZAqmDBKO4Mga" Content-Disposition: inline In-Reply-To: <538E8462.80309@cn.fujitsu.com> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --mVyWZAqmDBKO4Mga Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jun 04, 2014 at 10:28:50AM +0800, Lai Jiangshan wrote: > On 06/03/2014 07:24 PM, Lai Jiangshan wrote: > > Hi, Jason > >=20 > > Could you test again after the following command has done. > > (if Peter hasn't asked you test with this command before nor he doesn't= stop you now)=20 > >=20 > > echo NO_TTWU_QUEUE > /sys/kernel/debug/sched_features >=20 >=20 > Off-topic! >=20 > Why sched_features is in debugfs? I thought it is in procfs or sysfs. because its for debugging, note that the entire thing relies on CONFIG_SCHED_DEBUG, if you build without that its gone. Its not an API its not for production use, its debugging. --mVyWZAqmDBKO4Mga Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAEBAgAGBQJTjsFPAAoJEHZH4aRLwOS6wYQP/0fVJ9hb5SboMSTqQisdSnxp +eepBS0QRmcdjeN3dIg9GmS6SfcJgDAgVmSVvZB9dLnt4InIsSTCMQEfo1I6uSHC n5raMFHc7LO/HK2QRvJ0HsTL5QVcsYnKyxBzKiSyrJDG37xlolQcCaSZo7SncK7b CgqzR0R1uobMOqKQjR9Ay4WvQBDwz0bV/djL+HtKvZilAH+opuRJR1PshL5vo/ZI JtClWI9jJateT/D5zY/jNn5GJpDG90QMCCy89GdifTrhYQ6+Z3J2YsEYjlebdTym AxxI7+prYJn+zcNIYM+RYiY77zDs5k53fljFZJQccwnTSCi4NfI4CBqSzIIU6tns i8cxr8C3DPrIsNgzRcaPPiITmhzbQ4b4lkg+SnPt5PTluzyrswTXZe6stguldoV2 1H5CXE6rwLkifjweapKTCo9jdjftDoxcaTdGTXWul2UEkJobvhLIiYMicEcZ7jhc 0zu2VNotTFyAYnRDzfrpbQ6DV9Di0Z0NJzeOzMoyGk0S4WNlpm5F/K9RJ5yFkce+ aJ7RqfcpxMCZ9Jbz5qvEUrmQwt4Fn3mKOktYsK34cpq+jlU6NOPcH19CiwAKrxzT FtaJOgUVmPfU10Ni+D7g4pQQ3ZoeAVth3XOXJPzjI7iURTovd1r6VgMo9E+WGbMi kZJJrXPsuTBhMkCWnqWG =Jv4E -----END PGP SIGNATURE----- --mVyWZAqmDBKO4Mga--