From nobody Mon Feb 9 15:07:23 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 5F0AB2E3B11; Thu, 16 Oct 2025 21:47:43 +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=1760651263; cv=none; b=XAXqdrUNGcSW1BN9XvC2V8ZThUmufsz49dHq1eo8xVSfIYwkSfH6c0CLrbjgTmTM2Ts9JoJrczIi2qac7xeOr4EnhH9SV0qjNNj/8SNBi0YDSFZo8wAyLN6EJVRYUbvDTztne+VhLtb0OVNP2XeeDBQ7NJfK7zo9YlsAywohnuY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760651263; c=relaxed/simple; bh=g99OCDg+O4NaDOs/ndbyxSF/STWXFkeOPJ9vC+7TBxg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=sxwJbHS3FpdAoK6Z523Bi5bWIXgjbhmDwf/sODQgzyvq8dbpVc6DKCn3ZG7zROQAHBaq+ipuMrKeoWnA391xnQzBOUegUQNg1jJduXDucU7zD4Tu/jtN1kLXZ92wWkQUkKV3CMSrpICyeoWtO/XvznLDrXodC2PxREIMILzRS60= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fwtCxPKD; 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="fwtCxPKD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 02161C4CEF1; Thu, 16 Oct 2025 21:47:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1760651263; bh=g99OCDg+O4NaDOs/ndbyxSF/STWXFkeOPJ9vC+7TBxg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fwtCxPKDqmHCnbO7A67EvI3Zlstl4VXZX1AamrcGOZrkXAEICzZIAsxq78wBX+nv/ PtSt9V3NfdD4xtGOEd/+vx5CyX6YzOnuQaq/WFOqa6EM1eTfwgKbtqE+qo/DTG+3T0 aJgJ2LwxviUNGfqViVRkKk7fkDxFTO4fHzlc/TUdTsi6e1Jcn15UP/94A0dlqAq8bd jApCbDSu/1Fsj5PQNERwnOR7L7R7yngVSpG0P0v3mEeQBgUxDRPFawnQUGjUjppTAS GGi1+rz0T5Z6SCqNigNXpGO2XHzilnI1XroYo285su7QIek5BYiLioImbmCdhNbpLf fIJSKRFX1UU5w== From: SeongJae Park To: Cc: SeongJae Park , "Liam R. Howlett" , Andrew Morton , David Hildenbrand , Jonathan Corbet , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Suren Baghdasaryan , Vlastimil Babka , bijan311@gmail.com, damon@lists.linux.dev, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH 4/5] Docs/admin-guide/mm/damon/usage: document obsolete_target file Date: Thu, 16 Oct 2025 14:47:31 -0700 Message-ID: <20251016214736.84286-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251016214736.84286-1-sj@kernel.org> References: <20251016214736.84286-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Document the newly added obsolete_target DAMON sysfs file. Signed-off-by: SeongJae Park --- Documentation/admin-guide/mm/damon/usage.rst | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/Documentation/admin-guide/mm/damon/usage.rst b/Documentation/a= dmin-guide/mm/damon/usage.rst index 98958975604d..d8a3d6e740b3 100644 --- a/Documentation/admin-guide/mm/damon/usage.rst +++ b/Documentation/admin-guide/mm/damon/usage.rst @@ -67,7 +67,7 @@ comma (","). =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 = intervals_goal/access_bp,aggrs,min_sample_us,max_sample_us =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 nr_regions= /min,max =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 :ref:`targets `/nr_targets - =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 :ref:`0 `/pid_target + =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 :ref:`0 `/pid_target,obsolete_target =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 = :ref:`regions `/nr_regions =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 = =E2=94=82 :ref:`0 `/start,end =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 = =E2=94=82 ... @@ -264,13 +264,20 @@ to ``N-1``. Each directory represents each monitorin= g target. targets// ------------ =20 -In each target directory, one file (``pid_target``) and one directory -(``regions``) exist. +In each target directory, two files (``pid_target`` and ``obsolete_target`= `) +and one directory (``regions``) exist. =20 If you wrote ``vaddr`` to the ``contexts//operations``, each target sho= uld be a process. You can specify the process to DAMON by writing the pid of = the process to the ``pid_target`` file. =20 +Users can selectively remove targets in the middle of the targets array by +writing non-zero value to ``obsolete_target`` file and committing it (writ= ing +``commit`` to ``state`` file). DAMON will remove the matching targets fro= m its +internal targets array. Users are responsible to construct target directo= ries +again, so that those correctly represent the changed internal targets arra= y. + + .. _sysfs_regions: =20 targets//regions --=20 2.47.3