From nobody Sat Feb 7 15:11:10 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E5524393405; Tue, 13 Jan 2026 15:27:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768318053; cv=none; b=Q1CgOCNwNgQ3I5IXAXb2a//oSx4SQzAeHJzpmIpD0PJ5bte2wZoU2wJxVFuvp8Kwhs9KSmPnbfAfHgWqX7n/llJ6k19ssSlPjtskuV78ufYbkiIc8FvVxVXNJLU/1AFCykZM7wH66yP1R31Lqpuqq3ttonN10lloNTzc1X4IxLQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768318053; c=relaxed/simple; bh=Wj0dAUEbE3nyWuMQ+51OFmWg9i5unPK4WiDRQNYOALc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VZuZ5AQ/tYgjf7CWrMU3EpN3+de0ZJdbBkihgYFz9XOgNCwXlHJSgoNa5dvCJhlHUuV605Tsbx2SYBKIighppjUhMqbw7Cwd5X9JJVPK4A6XsdgVY/f1nl84X+vpEo5hX0htoIRUxhm8IFJa+Kg4l+PE+DzFiC6B56WNj/1KXos= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YdqTQfw5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="YdqTQfw5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6E7F4C19424; Tue, 13 Jan 2026 15:27:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768318052; bh=Wj0dAUEbE3nyWuMQ+51OFmWg9i5unPK4WiDRQNYOALc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YdqTQfw59TQTrYZHgAP3pNMp/sMoVB6t0t/t+feeT8iON9eWWmQIdgg9tB4lzdMrt 0EFRTszgUKharMpOUI3taS5WRcGSpXt1bY2zvJRXQ/rF2Inbs0fmu7eS7d6mw0qkR3 oe6TR5PrLMjWmPf/jdlQtN8JHPe3lg0zvHTmjJcanyYXRvMtdAVZQFBSqgNY0S2YQ7 3tVZNFOvrpHLBt6jqs13jRVygx0mAe+PUQ4NfIDoPXrOvZXuMJ8y5iXDxBx5fneGZE bMmlhbq4KVYlz3z0t67O8NmMOC3dWaubERxRXMRav6j2BTIkG7Fwdu7dMdxeyKBsrt Q3NXYeY3Vj1zQ== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , "Liam R. Howlett" , David Hildenbrand , Jonathan Corbet , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Suren Baghdasaryan , Vlastimil Babka , damon@lists.linux.dev, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 07/11] Docs/admin-guide/mm/damon/lru_sort: document filter_young_pages Date: Tue, 13 Jan 2026 07:27:12 -0800 Message-ID: <20260113152717.70459-8-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260113152717.70459-1-sj@kernel.org> References: <20260113152717.70459-1-sj@kernel.org> 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 the new DAMON_LRU_SORT parameter, filter_young_pages. It can be used to use page level access re-check for the LRU sorting. Signed-off-by: SeongJae Park Acked-by: wang lian --- Documentation/admin-guide/mm/damon/lru_sort.rst | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/Documentation/admin-guide/mm/damon/lru_sort.rst b/Documentatio= n/admin-guide/mm/damon/lru_sort.rst index 72a943202676..bb222a32aefd 100644 --- a/Documentation/admin-guide/mm/damon/lru_sort.rst +++ b/Documentation/admin-guide/mm/damon/lru_sort.rst @@ -79,6 +79,20 @@ of parametrs except ``enabled`` again. Once the re-read= ing is done, this parameter is set as ``N``. If invalid parameters are found while the re-reading, DAMON_LRU_SORT will be disabled. =20 +filter_young_pages +------------------ + +Filter [non-]young pages accordingly for LRU [de]prioritizations. + +If this is set, check page level access (youngness) once again before each +LRU [de]prioritization operation. LRU prioritization operation is skipped +if the page has not accessed since the last check (not young). LRU +deprioritization operation is skipped if the page has accessed since the +last check (young). The feature is enabled or disabled if this parameter = is +set as ``Y`` or ``N``, respectively. + +Disabled by default. + hot_thres_access_freq --------------------- =20 --=20 2.47.3