From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755164Ab1GLUFp (ORCPT ); Tue, 12 Jul 2011 16:05:45 -0400 Received: from e6.ny.us.ibm.com ([32.97.182.146]:35688 "EHLO e6.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753679Ab1GLUFo (ORCPT ); Tue, 12 Jul 2011 16:05:44 -0400 Date: Tue, 12 Jul 2011 13:05:15 -0700 From: "Paul E. McKenney" To: Peter Zijlstra Cc: Konrad Rzeszutek Wilk , Jeremy Fitzhardinge , xen-devel@lists.xensource.com, julie Sullivan , linux-kernel@vger.kernel.org, chengxu@linux.vnet.ibm.com Subject: Re: PROBLEM: 3.0-rc kernels unbootable since -rc3 Message-ID: <20110712200515.GK2326@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20110711201508.GN2245@linux.vnet.ibm.com> <20110711210954.GA15745@dumpdata.com> <20110712105506.GB2253@linux.vnet.ibm.com> <20110712141228.GA7831@dumpdata.com> <20110712144936.GD2326@linux.vnet.ibm.com> <20110712160324.GA1186@dumpdata.com> <20110712163947.GF2326@linux.vnet.ibm.com> <20110712180151.GA18257@dumpdata.com> <20110712185907.GJ2326@linux.vnet.ibm.com> <1310497836.14978.34.camel@twins> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1310497836.14978.34.camel@twins> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 12, 2011 at 09:10:36PM +0200, Peter Zijlstra wrote: > On Tue, 2011-07-12 at 11:59 -0700, Paul E. McKenney wrote: > > OK, so the infinite loop in task_waking_fair() happens even if RCU callbacks > > are deferred until after the scheduler is fully initialized. Sounds like > > one for the scheduler guys. ;-) > > https://lkml.org/lkml/2011/7/12/150 > > ? Looks like that would do the trick, thank you Peter! Konrad, Julie, Ravi, could you please try out Peter's patch? Thanx, Paul