From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-it1-f197.google.com (mail-it1-f197.google.com [209.85.166.197]) by kanga.kvack.org (Postfix) with ESMTP id 045EF8E00F9 for ; Fri, 4 Jan 2019 19:20:52 -0500 (EST) Received: by mail-it1-f197.google.com with SMTP id b14so2197750itd.1 for ; Fri, 04 Jan 2019 16:20:52 -0800 (PST) Received: from out30-133.freemail.mail.aliyun.com (out30-133.freemail.mail.aliyun.com. [115.124.30.133]) by mx.google.com with ESMTPS id k8si569153itk.97.2019.01.04.16.20.49 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 04 Jan 2019 16:20:50 -0800 (PST) From: Yang Shi Subject: [v2 PATCH 5/5] doc: memcontrol: add description for wipe_on_offline Date: Sat, 5 Jan 2019 08:19:20 +0800 Message-Id: <1546647560-40026-6-git-send-email-yang.shi@linux.alibaba.com> In-Reply-To: <1546647560-40026-1-git-send-email-yang.shi@linux.alibaba.com> References: <1546647560-40026-1-git-send-email-yang.shi@linux.alibaba.com> Sender: owner-linux-mm@kvack.org List-ID: 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 Add desprition of wipe_on_offline interface in cgroup documents. Cc: Michal Hocko Cc: Johannes Weiner 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