From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7AC74C3A59E for ; Wed, 4 Sep 2019 05:40:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4DA8420870 for ; Wed, 4 Sep 2019 05:40:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567575608; bh=W/y6551yNqM66Wyl3GTRYPX7WLgAlJju03McfIcLt/I=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=zWz/5GNNpXm8wpXuMpXqsilpNKmTw9x9++/+RYzU3sklHLm3sxuVIOtph/w0+2wzO nNwvEcP7O0QWdBmhJhJKIELnNDYr8hqQIpdPSQcEJYNnwImFe92zeBMygDM7fG3hyz I0TpcbIMhKNuQ+TAn3+HKCH5T+9AsyGZCVNW+Da0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728595AbfIDFkH (ORCPT ); Wed, 4 Sep 2019 01:40:07 -0400 Received: from mx2.suse.de ([195.135.220.15]:51398 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726045AbfIDFkH (ORCPT ); Wed, 4 Sep 2019 01:40:07 -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 07E7CADC4; Wed, 4 Sep 2019 05:40:06 +0000 (UTC) Date: Wed, 4 Sep 2019 07:40:04 +0200 From: Michal Hocko To: Tetsuo Handa Cc: linux-mm@kvack.org, Andrew Morton , David Rientjes , LKML Subject: Re: [RFC PATCH] mm, oom: disable dump_tasks by default Message-ID: <20190904054004.GA3838@dhcp22.suse.cz> References: <20190903144512.9374-1-mhocko@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 04-09-19 05:52:43, Tetsuo Handa wrote: > On 2019/09/03 23:45, Michal Hocko wrote: > > It's primary purpose is > > to help analyse oom victim selection decision. > > I disagree, for I use the process list for understanding what / how many > processes are consuming what kind of memory (without crashing the system) > for anomaly detection purpose. Although we can't dump memory consumed by > e.g. file descriptors, disabling dump_tasks() loose that clue, and is > problematic for me. Does anything really prevent you from enabling this by sysctl though? Or do you claim that this is a general usage pattern and therefore the default change is not acceptable or do you want a changelog to be updated? -- Michal Hocko SUSE Labs