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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 40566C43387 for ; Wed, 9 Jan 2019 19:20:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 19A28214C6 for ; Wed, 9 Jan 2019 19:20:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728202AbfAITUY (ORCPT ); Wed, 9 Jan 2019 14:20:24 -0500 Received: from out30-131.freemail.mail.aliyun.com ([115.124.30.131]:43002 "EHLO out30-131.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728143AbfAITUX (ORCPT ); Wed, 9 Jan 2019 14:20:23 -0500 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R231e4;CH=green;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e07486;MF=yang.shi@linux.alibaba.com;NM=1;PH=DS;RN=7;SR=0;TI=SMTPD_---0THtvvDg_1547061291; Received: from e19h19392.et15sqa.tbsite.net(mailfrom:yang.shi@linux.alibaba.com fp:SMTPD_---0THtvvDg_1547061291) by smtp.aliyun-inc.com(127.0.0.1); Thu, 10 Jan 2019 03:14:59 +0800 From: Yang Shi To: mhocko@suse.com, hannes@cmpxchg.org, shakeelb@google.com, akpm@linux-foundation.org Cc: yang.shi@linux.alibaba.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [v3 PATCH 5/5] doc: memcontrol: add description for wipe_on_offline Date: Thu, 10 Jan 2019 03:14:45 +0800 Message-Id: <1547061285-100329-6-git-send-email-yang.shi@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1547061285-100329-1-git-send-email-yang.shi@linux.alibaba.com> References: <1547061285-100329-1-git-send-email-yang.shi@linux.alibaba.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add desprition of wipe_on_offline interface in cgroup documents. Cc: Michal Hocko Cc: Johannes Weiner Cc: Shakeel Butt Signed-off-by: Yang Shi --- Documentation/admin-guide/cgroup-v2.rst | 9 +++++++++ Documentation/cgroup-v1/memory.txt | 10 ++++++++++ 2 files changed, 19 insertions(+) diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst index 0290c65..e4ef08c 100644 --- a/Documentation/admin-guide/cgroup-v2.rst +++ b/Documentation/admin-guide/cgroup-v2.rst @@ -1303,6 +1303,15 @@ PAGE_SIZE multiple when read back. memory pressure happens. If you want to avoid that, force_empty will be useful. + memory.wipe_on_offline + + This is similar to force_empty, but it just does memory reclaim + asynchronously in css offline kworker. + + Writing into 1 will enable it, disable it by writing into 0. + + It would reclaim as much as possible memory just as what force_empty does. + Usage Guidelines ~~~~~~~~~~~~~~~~ diff --git a/Documentation/cgroup-v1/memory.txt b/Documentation/cgroup-v1/memory.txt index 8e2cb1d..1c6e1ca 100644 --- a/Documentation/cgroup-v1/memory.txt +++ b/Documentation/cgroup-v1/memory.txt @@ -71,6 +71,7 @@ Brief summary of control files. memory.stat # show various statistics memory.use_hierarchy # set/show hierarchical account enabled memory.force_empty # trigger forced page reclaim + memory.wipe_on_offline # trigger forced page reclaim when offlining memory.pressure_level # set memory pressure notifications memory.swappiness # set/show swappiness parameter of vmscan (See sysctl's vm.swappiness) @@ -581,6 +582,15 @@ hierarchical_= N0= N1= ... The "total" count is sum of file + anon + unevictable. +5.7 wipe_on_offline + +This is similar to force_empty, but it just does memory reclaim asynchronously +in css offline kworker. + +Writing into 1 will enable it, disable it by writing into 0. + +It would reclaim as much as possible memory just as what force_empty does. + 6. Hierarchy support The memory controller supports a deep hierarchy and hierarchical accounting. -- 1.8.3.1