Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760098Ab1D0WHZ (ORCPT ); Wed, 27 Apr 2011 18:07:25 -0400 Received: from e3.ny.us.ibm.com ([32.97.182.143]:49198 "EHLO e3.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755313Ab1D0WHY (ORCPT ); Wed, 27 Apr 2011 18:07:24 -0400 Date: Wed, 27 Apr 2011 15:07:17 -0700 From: "Paul E. McKenney" To: Bruno =?iso-8859-1?Q?Pr=E9mont?= Cc: Thomas Gleixner , Linus Torvalds , Ingo Molnar , Peter Zijlstra , Mike Frysinger , KOSAKI Motohiro , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, "Paul E. McKenney" , Pekka Enberg Subject: Re: 2.6.39-rc4+: Kernel leaking memory during FS scanning, regression? Message-ID: <20110427220717.GR2135@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20110425214933.GO2468@linux.vnet.ibm.com> <20110426081904.0d2b1494@pluto.restena.lu> <20110426112756.GF4308@linux.vnet.ibm.com> <20110426183859.6ff6279b@neptune.home> <20110426190918.01660ccf@neptune.home> <20110427081501.5ba28155@pluto.restena.lu> <20110427204139.1b0ea23b@neptune.home> <20110427224023.10bd4f33@neptune.home> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20110427224023.10bd4f33@neptune.home> 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 Content-Length: 1700 Lines: 40 On Wed, Apr 27, 2011 at 10:40:23PM +0200, Bruno Pr?mont wrote: > On Wed, 27 April 2011 Bruno Pr?mont wrote: > > On Wed, 27 April 2011 Bruno Pr?mont wrote: > > > On Wed, 27 Apr 2011 00:28:37 +0200 (CEST) Thomas Gleixner wrote: > > > > Also please apply the patch below and check, whether the printk shows > > > > up in your dmesg. > > > > > > > Index: linux-2.6-tip/kernel/sched_rt.c > > > > =================================================================== > > > > --- linux-2.6-tip.orig/kernel/sched_rt.c > > > > +++ linux-2.6-tip/kernel/sched_rt.c > > > > @@ -609,6 +609,7 @@ static int sched_rt_runtime_exceeded(str > > > > > > > > if (rt_rq->rt_time > runtime) { > > > > rt_rq->rt_throttled = 1; > > > > + printk_once(KERN_WARNING "sched: RT throttling activated\n"); > > > > This gun is triggering right before RCU-managed slabs start piling up as > > visible under slabtop so chances are it's at least a related! > > Letting the machine idle (except running collectd and slabtop) scheduler > suddenly decided to restart giving rcu_kthread CPU cycles (after two hours > or so! if I read my statistics graphs correctly) And this also returned the slab memory, right? Two hours is quite some time... Thanx, Paul > While looking at lkml during the above 2 hours I stumbled across this (the > patch of which doesn't help in my case) which looked possibly related. > http://thread.gmane.org/gmane.linux.kernel/1129614 > > Bruno -- 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/