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Wed, 16 Sep 2026 17:35:59 -0700 (PDT) Received: from ydg-Zenbook-14-UM3406GA ([2001:2d8:7f00:8c85:3990:d106:a51f:be7c]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39e36115cc8sm1722374a91.3.2026.09.16.17.35.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Sep 2026 17:35:59 -0700 (PDT) From: Donggeun Yoo To: sj@kernel.org, akpm@linux-foundation.org Cc: damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, donggeunyoo.kernel@gmail.com Subject: [PATCH v1 0/2] mm/damon/core: fix the size charged for a filter-trimmed region Date: Thu, 17 Sep 2026 09:35:51 +0900 Message-ID: <20260917003553.2465523-1-donggeunyoo.kernel@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: damon@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit An address range DAMOS filter that partially overlaps a monitoring region splits it, so the scheme action reaches only one side of the boundary. damos_apply_scheme() reads the region size before that split and never re-reads it, so the quota charge and schemes//stats/sz_tried account for the whole original region. Patch 1 re-reads the size after the core filters have run. Patch 2 adds KUnit coverage for what the function charges and reports, for the trimmed cases and for the cases that must not change. Donggeun Yoo (2): mm/damon/core: charge only the part of a region the filter left mm/damon/tests/core-kunit: test the size charged for a filter-trimmed region mm/damon/core.c | 1 + mm/damon/tests/core-kunit.h | 316 ++++++++++++++++++++++++++++++++++++ 2 files changed, 317 insertions(+) base-commit: 892f5b3b07e5b07f2f29c87750ff94fa58dcab73 -- 2.53.0