From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752116AbbLUVH6 (ORCPT ); Mon, 21 Dec 2015 16:07:58 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:51708 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751563AbbLUVH4 (ORCPT ); Mon, 21 Dec 2015 16:07:56 -0500 Subject: Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408! To: Christoph Lameter References: <5674A5C3.1050504@oracle.com> <567860EB.4000103@oracle.com> Cc: Michal Hocko , LKML , "linux-mm@kvack.org" From: Sasha Levin X-Enigmail-Draft-Status: N1110 Message-ID: <56786A22.9030103@oracle.com> Date: Mon, 21 Dec 2015 16:07:46 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 MIME-Version: 1.0 In-Reply-To: <567860EB.4000103@oracle.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/21/2015 03:28 PM, Sasha Levin wrote: > On 12/21/2015 08:08 AM, Christoph Lameter wrote: >> > On Fri, 18 Dec 2015, Sasha Levin wrote: >> > >>>> >> > [ 531.164630] RIP vmstat_update (mm/vmstat.c:1408) >> > Hmmm.. Yes we need to fold the diffs first before disabling the timer >> > otherwise the shepherd task may intervene. >> > >> > Does this patch fix it? > It didn't. With the patch I'm still seeing: I've also noticed a new warning from the workqueue code which my scripts didn't pick up before: [ 3462.380681] BUG: workqueue lockup - pool cpus=2 node=2 flags=0x4 nice=0 stuck for 54s! [ 3462.522041] workqueue vmstat: flags=0xc [ 3462.527795] pwq 4: cpus=2 node=2 flags=0x0 nice=0 active=1/256 [ 3462.554836] pending: vmstat_update Thanks, Sasha