Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751542AbdINRxa (ORCPT ); Thu, 14 Sep 2017 13:53:30 -0400 Received: from out0-213.mail.aliyun.com ([140.205.0.213]:37358 "EHLO out0-213.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751352AbdINRx1 (ORCPT ); Thu, 14 Sep 2017 13:53:27 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R211e4;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e02c03302;MF=yang.s@alibaba-inc.com;NM=1;PH=DS;RN=7;SR=0;TI=SMTPD_---.8u1pto5_1505411594; Subject: Re: [PATCH 1/3] mm: slab: output reclaimable flag in /proc/slabinfo To: Christopher Lameter Cc: penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <1505409289-57031-1-git-send-email-yang.s@alibaba-inc.com> <1505409289-57031-2-git-send-email-yang.s@alibaba-inc.com> From: "Yang Shi" Message-ID: Date: Fri, 15 Sep 2017 01:53:13 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 548 Lines: 19 On 9/14/17 10:27 AM, Christopher Lameter wrote: > Well /proc/slabinfo is a legacy interface. The infomation if a slab is > reclaimable is available via the slabinfo tool. We would break a format > that is relied upon by numerous tools. Thanks for pointing this out. It would be unacceptable if it would break the backward compatibility. A follow-up question is do we know what tools rely on the slabinfo format? From my point of view, although /proc/slabinfo is legacy, it sounds it is still used very often by the users. Thanks, Yang >