From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx145.postini.com [74.125.245.145]) by kanga.kvack.org (Postfix) with SMTP id 07A0A6B0036 for ; Sat, 22 Jun 2013 16:10:00 -0400 (EDT) Subject: =?utf-8?q?Re=3A_=5BPATCH_for_3=2E2=5D_memcg=3A_do_not_trap_chargers_with_full_callstack_on_OOM?= Date: Sat, 22 Jun 2013 22:09:58 +0200 From: "azurIt" References: <20130208171012.GH7557@dhcp22.suse.cz>, <20130208220243.EDEE0825@pobox.sk>, <20130210150310.GA9504@dhcp22.suse.cz>, <20130210174619.24F20488@pobox.sk>, <20130211112240.GC19922@dhcp22.suse.cz>, <20130222092332.4001E4B6@pobox.sk>, <20130606160446.GE24115@dhcp22.suse.cz>, <20130606181633.BCC3E02E@pobox.sk>, <20130607131157.GF8117@dhcp22.suse.cz>, <20130617122134.2E072BA8@pobox.sk> <20130619132614.GC16457@dhcp22.suse.cz> In-Reply-To: <20130619132614.GC16457@dhcp22.suse.cz> MIME-Version: 1.0 Message-Id: <20130622220958.D10567A4@pobox.sk> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org List-ID: To: =?utf-8?q?Michal_Hocko?= Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, =?utf-8?q?cgroups_mailinglist?= , =?utf-8?q?KAMEZAWA_Hiroyuki?= , =?utf-8?q?Johannes_Weiner?= Michal, >> I'm unable to send you stacks or more info because problem is taking >> down the whole server for some time now (don't know what exactly >> caused it to start happening, maybe newer versions of 3.2.x). > >So you are not testing with the same kernel with just the old patch >replaced by the new one? No, i'm not testing with the same kernel but all are 3.2.x. I even cannot install older 3.2.x because grsecurity is always available for newest kernel and there is no archive of older versions (at least i don't know about any). >> But i'm sure of one thing - when problem occurs, nothing is able to >> access hard drives (every process which tries it is freezed until >> problem is resolved or server is rebooted). > >I would be really interesting to see what those tasks are blocked on. I'm trying to get it, stay tuned :) Today i noticed one bug, not 100% sure it is related to 'your' patch but i didn't seen this before. I noticed that i have lots of cgroups which cannot be removed - if i do 'rmdir ', it just hangs and never complete. Even more, it's not possible to access the whole cgroup filesystem until i kill that rmdir (anything, which tries it, just hangs). All unremoveable cgroups has this in 'memory.oom_control': oom_kill_disable 0 under_oom 1 And, yes, 'tasks' file is empty. azur -- 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