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Tue, 18 Mar 2025 09:42:45 -0700 (PDT) Date: Tue, 18 Mar 2025 12:42:43 -0400 From: Johannes Weiner To: Hao Jia Cc: akpm@linux-foundation.org, tj@kernel.org, corbet@lwn.net, mhocko@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev, muchun.song@linux.dev, mkoutny@suse.com, cgroups@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Hao Jia Subject: Re: [PATCH 1/2] mm: vmscan: Split proactive reclaim statistics from direct reclaim statistics Message-ID: <20250318164243.GA1867495@cmpxchg.org> References: <20250318075833.90615-1-jiahao.kernel@gmail.com> <20250318075833.90615-2-jiahao.kernel@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250318075833.90615-2-jiahao.kernel@gmail.com> X-Rspam-User: X-Rspamd-Queue-Id: A1B1140024 X-Rspamd-Server: rspam03 X-Stat-Signature: mkxgor85mi4d8dmaagpxnm9ww33ccw6h X-HE-Tag: 1742316166-694624 X-HE-Meta: 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 oKKbwiYB lcJCBWkdsmaYxURfwWIv6VS/j+VdOmLY0HKOZHYQFpoaabKvD6p6aNsyzLotkWna+g/Y1s6ta3q74IFbnVE2Z32EpeRRnFO/igPKSPcx6STywKh0ywRe6gCfzOK09gGQdiRnKsXkt9BW/BUxYrnweOLp0oyGyNDcTXf1O 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: List-Subscribe: List-Unsubscribe: On Tue, Mar 18, 2025 at 03:58:32PM +0800, Hao Jia wrote: > From: Hao Jia > > In proactive memory reclaim scenarios, it is necessary to > accurately track proactive reclaim statistics to dynamically > adjust the frequency and amount of memory being reclaimed > proactively. Currently, proactive reclaim is included in > direct reclaim statistics, which can make these > direct reclaim statistics misleading. > > Therefore, separate proactive reclaim memory from the > direct reclaim counters by introducing new counters: > pgsteal_proactive, pgdemote_proactive, and pgscan_proactive, > to avoid confusion with direct reclaim. > > Signed-off-by: Hao Jia This is indeed quite useful. Acked-by: Johannes Weiner