From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751658Ab2LJBUn (ORCPT ); Sun, 9 Dec 2012 20:20:43 -0500 Received: from gmmr4.centrum.cz ([46.255.227.253]:37883 "EHLO gmmr4.centrum.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751430Ab2LJBUm (ORCPT ); Sun, 9 Dec 2012 20:20:42 -0500 To: =?utf-8?q?Michal_Hocko?= Subject: =?utf-8?q?Re=3A_=5BPATCH_for_3=2E2=2E34=5D_memcg=3A_do_not_trigger_OOM_from_add=5Fto=5Fpage=5Fcache=5Flocked?= Date: Mon, 10 Dec 2012 02:20:38 +0100 From: "azurIt" Cc: , , =?utf-8?q?cgroups_mailinglist?= , =?utf-8?q?KAMEZAWA_Hiroyuki?= , =?utf-8?q?Johannes_Weiner?= References: <20121130144427.51A09169@pobox.sk>, <20121130144431.GI29317@dhcp22.suse.cz>, <20121130160811.6BB25BDD@pobox.sk>, <20121130153942.GL29317@dhcp22.suse.cz>, <20121130165937.F9564EBE@pobox.sk>, <20121130161923.GN29317@dhcp22.suse.cz>, <20121203151601.GA17093@dhcp22.suse.cz>, <20121205023644.18C3006B@pobox.sk>, <20121205141722.GA9714@dhcp22.suse.cz>, <20121206012924.FE077FD7@pobox.sk> <20121206095423.GB10931@dhcp22.suse.cz> In-Reply-To: <20121206095423.GB10931@dhcp22.suse.cz> X-Mailer: Centrum Email 5.3 X-Priority: 3 X-Original-From: azurit@pobox.sk MIME-Version: 1.0 Message-Id: <20121210022038.E6570D37@pobox.sk> X-Maser: brud Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >There are no other callers AFAICS so I am getting clueless. Maybe more >debugging will tell us something (the inlining has been reduced for thp >paths which can reduce performance in thp page fault heavy workloads but >this will give us better traces - I hope). Michal, this was printing so many debug messages to console that the whole server hangs and i had to hard reset it after several minutes :( Sorry but i cannot test such a things in production. There's no problem with one soft reset which takes 4 minutes but this hard reset creates about 20 minutes outage (mainly cos of disk quotas checking). Last logged message: Dec 10 02:03:29 server01 kernel: [ 220.366486] grsec: From 141.105.120.152: bruteforce prevention initiated for the next 30 minutes or until service restarted, stalling each fork 30 seconds. Please investigate the crash report for /usr/lib/apache2/mpm-itk/apache2[apache2:3586] uid/euid:1258/1258 gid/egid:100/100, parent /usr/lib/apache2/mpm-itk/apache2[apache2:2142] uid/euid:0/0 gid/egid:0/0