From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756827AbcK3HVI (ORCPT ); Wed, 30 Nov 2016 02:21:08 -0500 Received: from vps01.wiesinger.com ([46.36.37.179]:34816 "EHLO vps01.wiesinger.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752603AbcK3HU4 (ORCPT ); Wed, 30 Nov 2016 02:20:56 -0500 DKIM-Filter: OpenDKIM Filter v2.10.3 wiesinger.com uAU7Knmf022605 Subject: Re: Still OOM problems with 4.9er kernels To: linux-kernel@vger.kernel.org References: Cc: Linus Torvalds From: Gerhard Wiesinger Message-ID: Date: Wed, 30 Nov 2016 08:20:50 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.5.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, See also: Bug 1314697 - Kernel 4.4.3-300.fc23.x86_64 is not stable inside a KVM VM https://bugzilla.redhat.com/show_bug.cgi?id=1314697 Ciao, Gerhard On 30.11.2016 08:10, Gerhard Wiesinger wrote: > Hello, > > I'm having out of memory situations with my "low memory" VMs in KVM > under Fedora (Kernel 4.7, 4.8 and also before). They started to get > more and more sensitive to OOM. I recently found the following info: > > https://marius.bloggt-in-braunschweig.de/2016/11/17/linuxkernel-4-74-8-und-der-oom-killer/ > > https://www.spinics.net/lists/linux-mm/msg113661.html > > Therefore I tried the latest Fedora kernels: > 4.9.0-0.rc6.git2.1.fc26.x86_64 > > But OOM situation is still very easy to reproduce: > > 1.) VM with 128-384MB under Fedora 25 > > 2.) Having some processes run without any load (e.g. Apache) > > 3.) run an update with: dnf clean all; dnf update > > 4.) dnf python process get's killed > > > Please make the VM system working again in Kernel 4.9 and to use swap > again correctly. > > Thnx. > > Ciao, > > Gerhard > >