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t=1765175441; bh=RBgupw+0+IFAQYuywBDofV0MFSFxSZkVNemgNSqd6d8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QEs8xFy9N/5t6MNK2CW9AAKR6gDNiwtRhj8gFt5ysY2bEKeVLIvwaRR/qG925Ypc2 64UnTu0Zd/Oyj/x+WezlY5QUBF6+gk0sNwB1wrGtSYiT2cIlajPMqNFriu35CaQYyW uJSfF5aQP7wPFdZ9SYEfJUgQeDjB2PQDtkF6fPWt5rNaxZJ90HRSuFIngFYB+itSdE 1hbpcmy4Uc1E1kMcpDAmlIuwDlWc2+f2UQz0kq8y8lYCUBoLfb2E5ecL3inu0dgdU/ TWH0+AzWqtrCn/xMZrNdLQMrt67rpb8tnfnF6nghvTQiDYEzVZ9qtjcAaUms3XANOw qqQzxtBHmf7Ng== From: SeongJae Park To: Cc: SeongJae Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v3 33/37] mm/damon: support reporting write access Date: Sun, 7 Dec 2025 22:29:37 -0800 Message-ID: <20251208062943.68824-34-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251208062943.68824-1-sj@kernel.org> References: <20251208062943.68824-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 0232412000F X-Rspam-User: X-Rspamd-Server: rspam12 X-Stat-Signature: tokr1dz3srdwzb75yepu5xy9rkjymy41 X-HE-Tag: 1765175441-78986 X-HE-Meta: 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 SfkqYDLP mnj3J3gmiCTZE5llkRws+wllQ/5NgSQM+p0ogTakdbT4I9a1MObZTntJB0xL5su+QV7MbLbjSQ0rl5rfvccdjN8GXCVEngXf1hin15pUGkQ02eCMznqP5hwWScTTdEnj85oCaOdhpNJvRi9dWb5UVIWeP3tMnkYLaKHCJJairgPiYwiaD+hZNxvNoWNJpC+H0wVS+t1FtO+voRNW/bWV7pQSAaycDCj0f16y+hU2ZpnQ8TjZcfHPMN31BeNF9Kxpds92fgtduk8sWRlZatMKL9Hyn12KIEryRAcevQSkq/UAltXmcERuPtEtdF93Mm/632ZIIYMxRLf1+Y4rQVZMuL6ngLQ== 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: damon_report_access() callers could know whether the reporting access was for reading or writing. The information can be used for fine-grained monitoring, such as monitoring only read-only accesses or write-only accesses. Extend the reporting data structure so that the caller can pass the information. Signed-off-by: SeongJae Park --- include/linux/damon.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/damon.h b/include/linux/damon.h index e3408280ea72..9299fc91ba27 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -117,6 +117,7 @@ struct damon_target { * @size: The size of the accessed address range. * @cpu: The id of the CPU that made the access. * @tid: The task id of the task that made the access. + * @is_write: Whether the access is write. * * Any DAMON API callers that notified access events can report the information * to DAMON using damon_report_access(). This struct contains the reporting @@ -127,6 +128,7 @@ struct damon_access_report { unsigned long size; unsigned int cpu; pid_t tid; + bool is_write; /* private: */ unsigned long report_jiffies; /* when this report is made */ }; -- 2.47.3