From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751796AbcEQWVl (ORCPT ); Tue, 17 May 2016 18:21:41 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:39322 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750790AbcEQWVk (ORCPT ); Tue, 17 May 2016 18:21:40 -0400 Date: Tue, 17 May 2016 15:21:39 -0700 From: Andrew Morton To: Michal Hocko Cc: Oleg Nesterov , David Rientjes , linux-mm@kvack.org, LKML , Joonsoo Kim Subject: Re: [PATCH] oom: consider multi-threaded tasks in task_will_free_mem Message-Id: <20160517152139.fbda59b7c66e8470575050e8@linux-foundation.org> In-Reply-To: <20160517202856.GF12220@dhcp22.suse.cz> References: <1460452756-15491-1-git-send-email-mhocko@kernel.org> <20160426135752.GC20813@dhcp22.suse.cz> <20160517202856.GF12220@dhcp22.suse.cz> X-Mailer: Sylpheed 3.4.1 (GTK+ 2.24.23; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 17 May 2016 22:28:56 +0200 Michal Hocko wrote: > Andrew, this is not in the mmotm tree now because I didn't feel really > confortable with the patch without Oleg seeing it. But it seems Oleg is > ok [1] with it so could you push it to Linus along with the rest of oom > pile please? Reluctant. The CONFIG_COMPACTION=n regression which Joonsoo identified is quite severe. Before patch: 10000 forks succeed. After patch: 500 forks fail. Ouch. How can we merge such a thing? From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f198.google.com (mail-pf0-f198.google.com [209.85.192.198]) by kanga.kvack.org (Postfix) with ESMTP id 4BA226B007E for ; Tue, 17 May 2016 18:21:41 -0400 (EDT) Received: by mail-pf0-f198.google.com with SMTP id b203so58845656pfb.1 for ; Tue, 17 May 2016 15:21:41 -0700 (PDT) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org. [140.211.169.12]) by mx.google.com with ESMTPS id dz4si7321418pab.12.2016.05.17.15.21.40 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 17 May 2016 15:21:40 -0700 (PDT) Date: Tue, 17 May 2016 15:21:39 -0700 From: Andrew Morton Subject: Re: [PATCH] oom: consider multi-threaded tasks in task_will_free_mem Message-Id: <20160517152139.fbda59b7c66e8470575050e8@linux-foundation.org> In-Reply-To: <20160517202856.GF12220@dhcp22.suse.cz> References: <1460452756-15491-1-git-send-email-mhocko@kernel.org> <20160426135752.GC20813@dhcp22.suse.cz> <20160517202856.GF12220@dhcp22.suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Michal Hocko Cc: Oleg Nesterov , David Rientjes , linux-mm@kvack.org, LKML , Joonsoo Kim On Tue, 17 May 2016 22:28:56 +0200 Michal Hocko wrote: > Andrew, this is not in the mmotm tree now because I didn't feel really > confortable with the patch without Oleg seeing it. But it seems Oleg is > ok [1] with it so could you push it to Linus along with the rest of oom > pile please? Reluctant. The CONFIG_COMPACTION=n regression which Joonsoo identified is quite severe. Before patch: 10000 forks succeed. After patch: 500 forks fail. Ouch. How can we merge such a thing? -- 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