From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757402Ab3J1SXT (ORCPT ); Mon, 28 Oct 2013 14:23:19 -0400 Received: from alpha.arachsys.com ([91.203.57.7]:59141 "EHLO alpha.arachsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756672Ab3J1SXS (ORCPT ); Mon, 28 Oct 2013 14:23:18 -0400 Date: Mon, 28 Oct 2013 18:23:09 +0000 From: Richard Davies To: Dave Hansen Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Johannes Weiner Subject: Re: Unnecessary mass OOM kills on Linux 3.11 virtualization host Message-ID: <20131028182309.GA21822@alpha.arachsys.com> References: <20131024224326.GA19654@alpha.arachsys.com> <20131025103946.GA30649@alpha.arachsys.com> <20131028082825.GA30504@alpha.arachsys.com> <526EA947.7060608@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <526EA947.7060608@intel.com> 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 Dave Hansen wrote: > Richard Davies wrote: > > I further attach some other types of memory manager errors found in the > > kernel logs around the same time. There are several occurrences of each, but > > I have only copied one here for brevity: > > > > 19:18:27 kernel: BUG: Bad page map in process qemu-system-x86 pte:00000608 pmd:1d57fd067 > > FWIW, I took a quick look through your OOM report and didn't see any > obvious causes for it. But, INMHO, you should probably ignore the OOM > issue until you've fixed these "Bad page map" problems. Those are a > sign of a much deeper problem. Thanks! What investigation should I do for these? It is on stock 3.11.3. Richard.