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Howlett" , "# 5 . 19 . x" , Andrew Morton , David Hildenbrand , Jonathan Corbet , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , 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: [RFC PATCH 0/2] Docs/admin-guide/mm/damon: warn commit_inputs vs other params race Date: Sat, 28 Mar 2026 10:24:11 -0700 Message-ID: <20260328172415.49940-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 54E03140002 X-Stat-Signature: nmtqe3jtwa8othrzwjbtpd57uxjbc6ti X-Rspam-User: X-Rspamd-Server: rspam07 X-HE-Tag: 1774718658-60810 X-HE-Meta: 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 mbVNa/Gy /qRxNhQazC8qp3ceWaKhwVhnqztZthJ9XrsB+aZb/6xqdxUAMHOwq0O4r5qR2OapbiDG/noRHkDFRAqK2trVRoZMyVvEw5B22GxAwwN3Wy3yIm+mutCDhWpBEULMpC18SXLBRaQhgtXNXG/tMpx+eYlA3zlegdMHXYnPzPg7C34MZ2ddpS/QON+PmtMTK6E6b5IMJ7WFTzVCOt/LwKku7ydDHDfIOMQT39BGgrogs/LcTFMDID68Iyj6K2wpYEF7ocGCDDhvs8DpCztE0vA8l2rgKMkYz0f96DbOmjOs2UzTY4xJaoDd51HPG5PeCukk8l7NCkjzoUizsTOyaiqWbKsvmGw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Writing 'Y' to the commit_inputs parameter of DAMON_RECLAIM and DAMON_LRU_SORT, and writing other parameters before the commit_inputs request is completely processed can cause race conditions. While the consequence can be bad, the documentation is not clearly describing that. Add clear warnings. The issue was discovered [1,2] by sashiko. [1] https://lore.kernel.org/20260319161620.189392-3-objecting@objecting.org [2] https://lore.kernel.org/20260319161620.189392-2-objecting@objecting.org SeongJae Park (2): Docs/admin-guide/mm/damon/reclaim: warn commit_inputs vs param updates race Docs/admin-guide/mm/damon/lru_sort: warn commit_inputs vs param updates race Documentation/admin-guide/mm/damon/lru_sort.rst | 4 ++++ Documentation/admin-guide/mm/damon/reclaim.rst | 4 ++++ 2 files changed, 8 insertions(+) base-commit: 02617badb619e548c4489c371fec5a4ceb0c347e -- 2.47.3