From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-vk0-f72.google.com (mail-vk0-f72.google.com [209.85.213.72]) by kanga.kvack.org (Postfix) with ESMTP id 9388C6B0253 for ; Thu, 20 Oct 2016 09:34:00 -0400 (EDT) Received: by mail-vk0-f72.google.com with SMTP id 83so46538776vkd.3 for ; Thu, 20 Oct 2016 06:34:00 -0700 (PDT) Received: from mail-qk0-f196.google.com (mail-qk0-f196.google.com. [209.85.220.196]) by mx.google.com with ESMTPS id i1si19450253vkb.15.2016.10.20.06.33.59 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 20 Oct 2016 06:33:59 -0700 (PDT) Received: by mail-qk0-f196.google.com with SMTP id v138so4555268qka.2 for ; Thu, 20 Oct 2016 06:33:59 -0700 (PDT) Date: Thu, 20 Oct 2016 15:33:58 +0200 From: Michal Hocko Subject: Re: [RFC] fs/proc/meminfo: introduce Unaccounted statistic Message-ID: <20161020133358.GN14609@dhcp22.suse.cz> References: <20161020121149.9935-1-vbabka@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20161020121149.9935-1-vbabka@suse.cz> Sender: owner-linux-mm@kvack.org List-ID: To: Vlastimil Babka Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton , Mel Gorman , Johannes Weiner , "Kirill A. Shutemov" , Hugh Dickins , David Rientjes On Thu 20-10-16 14:11:49, Vlastimil Babka wrote: [...] > Hi, I'm wondering if people would find this useful. If you think it is, and > to not make performance worse, I could also make sure in proper submission > that values are not read via global_page_state() multiple times etc... I definitely find this information useful and hate to do the math all the time but on the other hand this is quite fragile and I can imagine we can easily forget to add something there and provide a misleading information to the userspace. So I would be worried with a long term maintainability of this. -- Michal Hocko SUSE Labs -- 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