linux-kernel - [RFC PATCH 0/2] mm/memcontrol: Finer-grained memory control

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Message-Id: <20190410191321.9527-1-longman@redhat.com>
Date:   Wed, 10 Apr 2019 15:13:19 -0400
From:   Waiman Long <longman@...hat.com>
To:     Tejun Heo <tj@...nel.org>, Li Zefan <lizefan@...wei.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Jonathan Corbet <corbet@....net>,
        Michal Hocko <mhocko@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>
Cc:     linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Roman Gushchin <guro@...com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Kirill Tkhai <ktkhai@...tuozzo.com>,
        Aaron Lu <aaron.lu@...el.com>, Waiman Long <longman@...hat.com>
Subject: [RFC PATCH 0/2] mm/memcontrol: Finer-grained memory control

The current control mechanism for memory cgroup v2 lumps all the memory
together irrespective of the type of memory objects. However, there
are cases where users may have more concern about one type of memory
usage than the others.

We have customer request to limit memory consumption on anonymous memory
only as they said the feature was available in other OSes like Solaris.

To allow finer-grained control of memory, this patchset 2 new control
knobs for memory controller:
 - memory.subset.list for specifying the type of memory to be under control.
 - memory.subset.high for the high limit of memory consumption of that
   memory type.

For simplicity, the limit is not hierarchical and applies to only tasks
in the local memory cgroup.

Waiman Long (2):
  mm/memcontrol: Finer-grained control for subset of allocated memory
  mm/memcontrol: Add a new MEMCG_SUBSET_HIGH event

 Documentation/admin-guide/cgroup-v2.rst |  35 +++++++++
 include/linux/memcontrol.h              |   8 ++
 mm/memcontrol.c                         | 100 +++++++++++++++++++++++-
 3 files changed, 142 insertions(+), 1 deletion(-)

-- 
2.18.1