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Howlett" , David Hildenbrand , Jonathan Corbet , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Randy Dunlap , Shuah Khan , Suren Baghdasaryan , Vlastimil Babka , damon@lists.linux.dev, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v2 0/7] mm/damon: introduce probe_hits_wsum DAMOS core filter Date: Fri, 11 Sep 2026 07:28:52 -0700 Message-ID: <20260911142852.98297-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911135510.96914-1-sj@kernel.org> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 81C504000D X-Stat-Signature: bbrpa4hmefkn9r5dfnhwouuxof6ndxqu X-Rspam-User: X-HE-Tag: 1789136941-654434 X-HE-Meta: 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 IqQLFCrf OCaWhq+M+A70OEpkTDWyUPM0qO4fFqE2sA0eH9IXxIWTpnyouMpTyiQDGYWd5zMcEon/idgv/G016OflhtEm0XEVF0TbIcztnTevz65S/+E6nJRBZwWxLX9HqD0r4NnZbnqegDgkZy4ek+hrZeOgk2odkyHvdh3woA6OIFz/gwfZUQHrhEH5EPqCQ20iBWWDBHE8pUQNzz61YolbauJyYzGvwtMGx+aMtpBW1xjCi6ssFQgIWeXDga57MGETQrc9UsAYfpcWACtPmuvSGPelumUhZxg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, 11 Sep 2026 06:55:02 -0700 SJ Park wrote: > DAMON can do flexible data attributes monitoring. The classical data > access monitoring can also be done using the attributes monitoring. The > access event is just one of the data attributes that DAMON supports. > Users do monitoring to make some actions based on it. DAMOS is a > feature for automating that. However, DAMOS cannot utilize the data > attributes monitoring results. It is still Data "Access" > Monitoring-based Operation Schemes. It requires users to set the target > "access" pattern. > > DAMOS core filter is effectively the same as the target access pattern. > It is just a more generalized and flexible way of describing the > operation action target region. Introduce a new DAMOS core filter type, > probe_hits_wsum. It specifies the filter target based on a range of the > probe hits weighted sum. Using this, users can apply DAMOS actions to > regions of specific data attributes pattern. Sashiko found no blocker for this series but a minor documentation issue that better to be clearified. Because it is too trivial for reposting entire series in my opinion, I asked Andrew to pick a fixup [1] for that together. Sashiko send its findings to damon@ mailing list [2], and I reply those if anything needs to be clarified. Please refer to those for details. [1] https://lore.kernel.org/20260911142522.98013-1-sj@kernel.org [2] https://lore.kernel.org/damon/ Thanks, SJ [...]