From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754522Ab3CRSfs (ORCPT ); Mon, 18 Mar 2013 14:35:48 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122]:8296 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754449Ab3CRSfq (ORCPT ); Mon, 18 Mar 2013 14:35:46 -0400 X-Authority-Analysis: v=2.0 cv=H5hZMpki c=1 sm=0 a=rXTBtCOcEpjy1lPqhTCpEQ==:17 a=mNMOxpOpBa8A:10 a=nGpB3NLV4dgA:10 a=5SG0PmZfjMsA:10 a=Q9fys5e9bTEA:10 a=meVymXHHAAAA:8 a=xnoB05DE7xsA:10 a=Q4RIower6W24urrL98UA:9 a=PUjeQqilurYA:10 a=rXTBtCOcEpjy1lPqhTCpEQ==:117 X-Cloudmark-Score: 0 X-Authenticated-User: X-Originating-IP: 74.67.115.198 Message-ID: <1363631744.25967.199.camel@gandalf.local.home> Subject: Re: workqueue code needing preemption disabled From: Steven Rostedt To: Tejun Heo Cc: LKML , RT , Clark Williams , Thomas Gleixner , Peter Zijlstra Date: Mon, 18 Mar 2013 14:35:44 -0400 In-Reply-To: <20130318182631.GB3042@htj.dyndns.org> References: <1363617383.25967.152.camel@gandalf.local.home> <20130318160652.GA20133@mtj.dyndns.org> <1363623799.25967.172.camel@gandalf.local.home> <1363624020.25967.175.camel@gandalf.local.home> <1363624243.25967.178.camel@gandalf.local.home> <20130318164351.GA21516@mtj.dyndns.org> <1363631036.25967.193.camel@gandalf.local.home> <20130318182631.GB3042@htj.dyndns.org> Content-Type: text/plain; charset="ISO-8859-15" X-Mailer: Evolution 3.4.4-2 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2013-03-18 at 11:26 -0700, Tejun Heo wrote: > > Hmm, the issue is that a "use to be" idle thread got migrated, and is > > now being woken up by another worker. What can cause an established > > worker to migrate without HOTPLUG being active? > > It doesn't. I think it's trying to wakeup the idle_list head. > That definitely makes sense. I'll go and write up a patch. Thanks!!! -- Steve