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Shutemov" , Roman Gushchin , linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@fb.com References: <20200508183105.225460-1-hannes@cmpxchg.org> <20200513113032.GA93568@dev-dsk-sblbir-1c-a524888b.ap-northeast-1.amazon.com> <20200513123545.GB488426@cmpxchg.org> From: Balbir Singh Message-ID: Date: Thu, 14 May 2020 21:04:53 +1000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200513123545.GB488426@cmpxchg.org> 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 13/5/20 10:35 pm, Johannes Weiner wrote: > As a result, the memcg gets a breakdown for memory.stat without having > to have private knowledge of what a page cache page is - how to test > it, when it's safe to test it, whether there can be huge pages in the > page cache, etc. pp. Memcg can focus on counting bytes, and the VM > code that is specialized in dealing with the page cache (or anon > pages, or shmem pages) can fill in those kinds of details for us. > > Less dependencies, less duplication, simpler API rules. > > The memory.stat output is the same, it's just much simpler code. Makes sense! Thanks, I should spend some time to re-read all of the memcontrol.c code :) Balbir Singh.