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[185.231.240.75]) by mx.google.com with ESMTPS id a1si27044055lfo.3.2019.04.11.07.38.06 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 11 Apr 2019 07:38:07 -0700 (PDT) Received-SPF: pass (google.com: domain of ktkhai@virtuozzo.com designates 185.231.240.75 as permitted sender) client-ip=185.231.240.75; Authentication-Results: mx.google.com; spf=pass (google.com: domain of ktkhai@virtuozzo.com designates 185.231.240.75 as permitted sender) smtp.mailfrom=ktkhai@virtuozzo.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=virtuozzo.com Received: from [172.16.25.169] by relay.sw.ru with esmtp (Exim 4.91) (envelope-from ) id 1hEapr-0002mK-Np; Thu, 11 Apr 2019 17:37:51 +0300 Subject: Re: [RFC PATCH 0/2] mm/memcontrol: Finer-grained memory control To: Waiman Long , Tejun Heo , Li Zefan , Johannes Weiner , Jonathan Corbet , Michal Hocko , Vladimir Davydov Cc: linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, Andrew Morton , Roman Gushchin , Shakeel Butt , Aaron Lu , aryabinin@virtuozzo.com References: <20190410191321.9527-1-longman@redhat.com> From: Kirill Tkhai Message-ID: <1b6ee304-6176-15a0-c3fa-0b59cdd60085@virtuozzo.com> Date: Thu, 11 Apr 2019 17:37:51 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20190410191321.9527-1-longman@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 10.04.2019 22:13, Waiman Long wrote: > 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(-) CC Andrey. In Virtuozzo kernel we have similar functionality for limitation of page cache in a cgroup: https://github.com/OpenVZ/vzkernel/commit/8ceef5e0c07c7621fcb0e04ccc48a679dfeec4a4