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[71.184.117.43]) by smtp.gmail.com with ESMTPSA id z4sm11821742qkz.62.2020.01.28.03.20.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 28 Jan 2020 03:20:30 -0800 (PST) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable From: Qian Cai Mime-Version: 1.0 (1.0) Subject: Re: [PATCH v2 0/9] Introduce Data Access MONitor (DAMON) Date: Tue, 28 Jan 2020 06:20:29 -0500 Message-Id: <41BBD985-4B3D-4F87-B69D-D8CFE6EC0EBE@lca.pw> References: <20200128104942.11419-1-sjpark@amazon.com> Cc: akpm@linux-foundation.org, SeongJae Park , sj38.park@gmail.com, acme@kernel.org, amit@kernel.org, brendan.d.gregg@gmail.com, corbet@lwn.net, dwmw@amazon.com, mgorman@suse.de, rostedt@goodmis.org, kirill@shutemov.name, brendanhiggins@google.com, colin.king@canonical.com, minchan@kernel.org, vdavydov.dev@gmail.com, vdavydov@parallels.com, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20200128104942.11419-1-sjpark@amazon.com> To: sjpark@amazon.com X-Mailer: iPhone Mail (17C54) 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 Jan 28, 2020, at 5:50 AM, sjpark@amazon.com wrote: >=20 > For the comments from perf maintainers, I added Steven Rostedt and Arnaldo= > Carvalho de Melo first, but I might missed someone. If you recommend some= more > people, I will add them to recipients. >=20 > I made DAMON as a new subsystem because I think no existing subsystem fits= well > to be a base of DAMON, due to DAMON's unique goals and mechanisms describe= d > below in the original cover letter. >=20 > The existing subsystem that most similar to DAMON might be 'mm/page_idle.c= '. > However, there are many conceptual differences with DAMON. One biggest > difference I think is the target. 'page_idle' deals with physical page fr= ames > while DAMON deals with virtual address of specific processes. >=20 > Nevertheless, if you have some different opinion, please let me know. I thought everyone should know to go to the MAINTAINERS file and search PERFO= RMANCE EVENTS SUBSYSTEM. It might be difficult but there is a perf subcommand for some subsystems lik= e sched: tracing/measuring of scheduler actions and latencies.=