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Tue, 18 Mar 2025 11:30:30 -0700 (PDT) From: Nhat Pham To: akpm@linux-foundation.org Cc: sj@kernel.org, corbet@lwn.net, linux-mm@kvack.org, kernel-team@meta.com, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, damon@lists.linux.dev Subject: [PATCH 1/2] mm/damon: implement a new DAMOS filter type for active pages Date: Tue, 18 Mar 2025 11:30:28 -0700 Message-ID: <20250318183029.2062917-2-nphamcs@gmail.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250318183029.2062917-1-nphamcs@gmail.com> References: <20250318183029.2062917-1-nphamcs@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Implement a DAMOS filter type for active pages on DAMON kernel API, and add support of it from the physical address space DAMON operations set (paddr). Suggested-by: SeongJae Park Signed-off-by: Nhat Pham Reviewed-by: SeongJae Park --- include/linux/damon.h | 2 ++ mm/damon/paddr.c | 3 +++ mm/damon/sysfs-schemes.c | 1 + 3 files changed, 6 insertions(+) diff --git a/include/linux/damon.h b/include/linux/damon.h index 3db4f77261f5..47e36e6ea203 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -334,6 +334,7 @@ struct damos_stat { /** * enum damos_filter_type - Type of memory for &struct damos_filter * @DAMOS_FILTER_TYPE_ANON: Anonymous pages. + * @DAMOS_FILTER_TYPE_ACTIVE: Active pages. * @DAMOS_FILTER_TYPE_MEMCG: Specific memcg's pages. * @DAMOS_FILTER_TYPE_YOUNG: Recently accessed pages. * @DAMOS_FILTER_TYPE_HUGEPAGE_SIZE: Page is part of a hugepage. @@ -355,6 +356,7 @@ struct damos_stat { */ enum damos_filter_type { DAMOS_FILTER_TYPE_ANON, + DAMOS_FILTER_TYPE_ACTIVE, DAMOS_FILTER_TYPE_MEMCG, DAMOS_FILTER_TYPE_YOUNG, DAMOS_FILTER_TYPE_HUGEPAGE_SIZE, diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c index b08847ef9b81..1b70d3f36046 100644 --- a/mm/damon/paddr.c +++ b/mm/damon/paddr.c @@ -217,6 +217,9 @@ static bool damos_pa_filter_match(struct damos_filter *= filter, case DAMOS_FILTER_TYPE_ANON: matched =3D folio_test_anon(folio); 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Tue, 18 Mar 2025 11:30:31 -0700 (PDT) Received: from localhost ([2a03:2880:25ff:71::]) by smtp.gmail.com with ESMTPSA id 00721157ae682-6ff32c80f2esm27165887b3.90.2025.03.18.11.30.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Mar 2025 11:30:31 -0700 (PDT) From: Nhat Pham To: akpm@linux-foundation.org Cc: sj@kernel.org, corbet@lwn.net, linux-mm@kvack.org, kernel-team@meta.com, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, damon@lists.linux.dev Subject: [PATCH 2/2] Docs/mm/damon/design: document active DAMOS filter type Date: Tue, 18 Mar 2025 11:30:29 -0700 Message-ID: <20250318183029.2062917-3-nphamcs@gmail.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250318183029.2062917-1-nphamcs@gmail.com> References: <20250318183029.2062917-1-nphamcs@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Document availability and meaning of "active" DAMOS filter type on design document. Since introduction of the type requires no additional user ABI, usage and ABI document need no update. Suggested-by: SeongJae Park Signed-off-by: Nhat Pham Reviewed-by: SeongJae Park --- Documentation/mm/damon/design.rst | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/des= ign.rst index aae3a691ee69..f12d33749329 100644 --- a/Documentation/mm/damon/design.rst +++ b/Documentation/mm/damon/design.rst @@ -656,6 +656,8 @@ Below ``type`` of filters are currently supported. - Operations layer handled, supported by only ``paddr`` operations set. - anon - Applied to pages that containing data that not stored in files. + - active + - Applied to active pages. - memcg - Applied to pages that belonging to a given cgroup. - young --=20 2.47.1