From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx183.postini.com [74.125.245.183]) by kanga.kvack.org (Postfix) with SMTP id 4D18D6B002B for ; Mon, 24 Sep 2012 14:19:35 -0400 (EDT) Date: Mon, 24 Sep 2012 20:19:27 +0200 From: Borislav Petkov Subject: Re: divide error: bdi_dirty_limit+0x5a/0x9e Message-ID: <20120924181927.GA25762@aftab.osrc.amd.com> References: <20120924102324.GA22303@aftab.osrc.amd.com> <20120924142305.GD12264@quack.suse.cz> <20120924143609.GH22303@aftab.osrc.amd.com> <20120924201650.6574af64.conny.seidel@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20120924201650.6574af64.conny.seidel@amd.com> Sender: owner-linux-mm@kvack.org List-ID: To: Conny Seidel Cc: Jan Kara , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Fengguang Wu , Peter Zijlstra , Andrew Morton , Johannes Weiner On Mon, Sep 24, 2012 at 08:16:50PM +0200, Conny Seidel wrote: > Hi, > > On Mon, 24 Sep 2012 16:36:09 +0200 > Borislav Petkov wrote: > >[ a?| ] > > > >Conny, would you test pls? > > Sure thing. > Out of ~25 runs I only triggered it once, without the patch the > trigger-rate is higher. > > [ 55.098249] Broke affinity for irq 81 > [ 55.105108] smpboot: CPU 1 is now offline > [ 55.311216] smpboot: Booting Node 0 Processor 1 APIC 0x11 > [ 55.333022] LVT offset 0 assigned for vector 0x400 > [ 55.545877] smpboot: CPU 2 is now offline > [ 55.753050] smpboot: Booting Node 0 Processor 2 APIC 0x12 > [ 55.775582] LVT offset 0 assigned for vector 0x400 > [ 55.986747] smpboot: CPU 3 is now offline > [ 56.193839] smpboot: Booting Node 0 Processor 3 APIC 0x13 > [ 56.212643] LVT offset 0 assigned for vector 0x400 > [ 56.423201] Got negative events: -25 I see it: __percpu_counter_sum does for_each_online_cpu without doing get/put_online_cpus(). -- Regards/Gruss, Boris. Advanced Micro Devices GmbH Einsteinring 24, 85609 Dornach GM: Alberto Bozzo Reg: Dornach, Landkreis Muenchen HRB Nr. 43632 WEEE Registernr: 129 19551 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org