Received: by 2002:ac0:aa62:0:0:0:0:0 with SMTP id w31-v6csp1530598ima; Thu, 25 Oct 2018 00:13:46 -0700 (PDT) X-Google-Smtp-Source: AJdET5c6c21TPL/1J4MkUK5mUDIFWbwmqZM1YFkrSaYqHgnk39+HALY4RJjM9eP+0yEX0bYmw65L X-Received: by 2002:a62:2741:: with SMTP id n62-v6mr431907pfn.138.1540451626005; Thu, 25 Oct 2018 00:13:46 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1540451625; cv=none; d=google.com; s=arc-20160816; b=ojey3ZNc4EIMr/s5Z0AZ2gPJg7qplMcw7uT8qZI2Sdu4Tvz0T8p0gDMWuISgTXYzHa QpKCNEXikVqUf77B7hKjE2JF24TKlGGnW+Zttd427j5AFQTFx9WsQm1uxwhmBIbwQZjD UMA9Qu5E3zuqRDkwYZ7QlNRzUAZ0dVQHDAfSj62pzJyXxNJBV7mOvnittGhVUgr/RCtz YiSWqKTb6QMH8XqlNwNphna6NSb6LSA5xnaz0/wi/SAAYuPwo0SLZrloOFO5YoReGpLl DkhL1Gyj6QI3W4JQlqkgJG47iQGSUwIVzxLhkaN5iFkN5bJmiAnVtZ+EVyWFerdKv7YY lSQA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=qENN6gx2MQ0TBIzkn6FJHkPo/JZiiKf33EdBE2IJlms=; b=ncXEitAj0fvY4Wa9+5j9rV4yknYZQR7ZJhTErT1/UXp2ViXoHcrLKz6CdjRqJMgNxY Piw3ACDvBWet5NijhmY31KwpDtFsJPMBQrM5AYhDj0ojcoSaCnGEVm70vS3NhYpMWP/2 q2ARWDtiJuPxgLMm1sHHenB3AUp4Fehz1X3qXdfcSyIUVbxEoQAYNZDPqQzercVdVjrI B7xDo4OC3TQeHUkcO/VnkeHRREAjQrog/VPqPpCVdvob9YvgUBeC+FIOsW6y5GJYjYAG XarcqI9H5ck5bpHfUozFu+FU971i/dpQVnsHwt+xAEVpzPR6knoKNSYwZWHoAnxoH9gT 9tdQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 1-v6si7127748ply.390.2018.10.25.00.13.29; Thu, 25 Oct 2018 00:13:45 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727021AbeJYPnJ (ORCPT + 99 others); Thu, 25 Oct 2018 11:43:09 -0400 Received: from mx2.suse.de ([195.135.220.15]:53196 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726465AbeJYPnJ (ORCPT ); Thu, 25 Oct 2018 11:43:09 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id D3932AD02; Thu, 25 Oct 2018 07:11:41 +0000 (UTC) Date: Thu, 25 Oct 2018 09:11:40 +0200 From: Michal Hocko To: Andrew Morton Cc: David Rientjes , Tetsuo Handa , Johannes Weiner , linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, guro@fb.com, kirill.shutemov@linux.intel.com, linux-kernel@vger.kernel.org, yang.s@alibaba-inc.com, Sergey Senozhatsky , Petr Mladek , Sergey Senozhatsky , Steven Rostedt Subject: Re: [PATCH] mm,oom: Use timeout based back off. Message-ID: <20181025071140.GK18839@dhcp22.suse.cz> References: <1540033021-3258-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp> <20181024155454.4e63191fbfaa0441f2e62f56@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181024155454.4e63191fbfaa0441f2e62f56@linux-foundation.org> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed 24-10-18 15:54:54, Andrew Morton wrote: [...] > There has been a lot of heat and noise and confusion and handwaving in > all of this. What we're crying out for is simple testcases which > everyone can run. Find a problem, write the testcase, distribute that. > Develop a solution for that testcase then move on to the next one. Agreed! It is important for these test to represent some reasonable workloads though. -- Michal Hocko SUSE Labs