Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751254Ab3FFEIR (ORCPT ); Thu, 6 Jun 2013 00:08:17 -0400 Received: from mail-pb0-f54.google.com ([209.85.160.54]:49811 "EHLO mail-pb0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750698Ab3FFEIO (ORCPT ); Thu, 6 Jun 2013 00:08:14 -0400 Message-ID: <1370491691.24311.326.camel@edumazet-glaptop> Subject: Re: stop_machine lockup issue in 3.9.y. From: Eric Dumazet To: Ben Greear Cc: Tejun Heo , Rusty Russell , Joe Lawrence , Linux Kernel Mailing List , stable@vger.kernel.org, "Luis R. Rodriguez" , Jouni Malinen , Vasanthakumar Thiagarajan , Senthil Balasubramanian , linux-wireless@vger.kernel.org, ath9k-devel@venema.h4ckr.net, Thomas Gleixner , Ingo Molnar Date: Wed, 05 Jun 2013 21:08:11 -0700 In-Reply-To: <51B00719.20406@candelatech.com> References: <51AE27D5.7050202@candelatech.com> <87sj0xry1k.fsf@rustcorp.com.au> <20130605071539.GA3429@mtj.dyndns.org> <51AF6E54.3050108@candelatech.com> <20130605184807.GD10693@mtj.dyndns.org> <51AF8D4B.4090407@candelatech.com> <51AF91F5.6090801@candelatech.com> <51AFA677.9010605@candelatech.com> <20130605211157.GK10693@mtj.dyndns.org> <1370482492.24311.308.camel@edumazet-glaptop> <20130606031444.GA12335@mtj.dyndns.org> <1370489181.24311.318.camel@edumazet-glaptop> <51B004CD.6080007@candelatech.com> <1370490403.24311.322.camel@edumazet-glaptop> <51B00719.20406@candelatech.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 719 Lines: 23 On Wed, 2013-06-05 at 20:50 -0700, Ben Greear wrote: > On 06/05/2013 08:46 PM, Eric Dumazet wrote: > > > > We use in Google a patch triggering warning is a thread holds the cpu > > without taking care to need_resched() for more than xx ms > > Well, I'm sure that patch works nicely until the clock stops moving > forward :) > This is not using jiffies, but the clock used in kernel/sched/core.c, with ns resolution ;) > I'll post a patch with limit of 10 shortly. ok -- 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/