From nobody Thu Oct 9 07:00:57 2025 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 131C52951BA; Thu, 19 Jun 2025 22:00:35 +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=1750370437; cv=none; b=f/a0EVDanJQIJjvyK5CMMn51MshpL9lgCEHZ8FkjRg/RL2j1iK8hq+15aLDIWcBd1xTgoORSVTVoszjN0669lLcfIA7SxitysggGCSumegcTVmc/4gq0yWvXKLce/K2K9s0Kyn+v17uEAVUgW1tB2zi4GHk3ZeerVmS8cOjVE3w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750370437; c=relaxed/simple; bh=mKWAyXf0fhqfpjFolQB3dWnDHH2ABS2xQxltFWbhL9Y=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=NjFuy8cJwZp9LojGGkaOebxCBDBFbrhBEVNLANFzaU7M5+/xfIXNUZRToWhgs6Luuftn2sk5gkNHGtXca18x616jZQ/Fr+ZMM4NhsnfDe80EkEG4AM28UT+p4us7oAey3BBZ4/SXWmYE1BpQdDhHK5ViTnNYJQoVCq6qDukVCzI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cakvDxr1; 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="cakvDxr1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4A362C4CEF1; Thu, 19 Jun 2025 22:00:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750370435; bh=mKWAyXf0fhqfpjFolQB3dWnDHH2ABS2xQxltFWbhL9Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cakvDxr1OyYgAtKoMJIZscdHNiK6lfpkPs8Cg2Z+zf54e+TuOPWXYQW4b/s8kmFJ6 CY5lhuiXnvghjEbIDaDHBSHTSnmj5q6I2nutSdl2LrOrfklBMDf+z0HeusEQE9g+Bj P9QWTUz7K+WbpDIkbfNkxAIaXJbsL47EroH1MdUvqpd4+j6wAbp/+0NTnw5egaaYn9 Fy1NsdPrt2RumgOeNINGGO8ywv22HTyQ1/J+iZ0TvksQDCou1LAhToJ5gP3VFWG+oj th2BSMgshRLEkZateM7dsNZcrN5fgQ6IzbxUI1Z9tQ5eon287c+ATPLdnfEoH7acuX Kd0nk8cATvkCw== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , Jonathan Corbet , damon@lists.linux.dev, kernel-team@meta.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH 06/11] Docs/mm/damon/design: document DAMOS_QUOTA_NODE_MEMCG_USED_BP Date: Thu, 19 Jun 2025 15:00:18 -0700 Message-Id: <20250619220023.24023-7-sj@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250619220023.24023-1-sj@kernel.org> References: <20250619220023.24023-1-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" Signed-off-by: SeongJae Park --- Documentation/mm/damon/design.rst | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/des= ign.rst index 2290ebefc648..eb6d3b7d0643 100644 --- a/Documentation/mm/damon/design.rst +++ b/Documentation/mm/damon/design.rst @@ -553,9 +553,9 @@ aggressiveness (the quota) of the corresponding scheme.= For example, if DAMOS is under achieving the goal, DAMOS automatically increases the quota. If = DAMOS is over achieving the goal, it decreases the quota. =20 -The goal can be specified with four parameters, namely ``target_metric``, -``target_value``, ``current_value`` and ``nid``. The auto-tuning mechanism -tries to make ``current_value`` of ``target_metric`` be same to +The goal can be specified with five parameters, namely ``target_metric``, +``target_value``, ``current_value``, ``nid`` and ``path``. The auto-tuning +mechanism tries to make ``current_value`` of ``target_metric`` be same to ``target_value``. =20 - ``user_input``: User-provided value. Users could use any metric that th= ey @@ -570,9 +570,16 @@ tries to make ``current_value`` of ``target_metric`` b= e same to set by users at the initial time. In other words, DAMOS does self-feedb= ack. - ``node_mem_used_bp``: Specific NUMA node's used memory ratio in bp (1/10= ,000). - ``node_mem_free_bp``: Specific NUMA node's free memory ratio in bp (1/10= ,000). +- ``node_memcg_used_bp``: Specific cgroup's node used memory ratio for a + specific NUMA node, in bp (1/10,000). =20 -``nid`` is optionally required for only ``node_mem_used_bp`` and -``node_mem_free_bp`` to point the specific NUMA node. +``nid`` is optionally required for only ``node_mem_used_bp``, +``node_mem_free_bp`` and ``node_memcg_used_bp`` to point the specific NUMA +node. + +``path`` is optionally required for only ``node_memcg_used_bp`` to point t= he +path to the cgroup. The value should be the path of the memory cgroup fro= m the +cgroups mount point. =20 To know how user-space can set the tuning goal metric, the target value, a= nd/or the current value via :ref:`DAMON sysfs interface `, refe= r to --=20 2.39.5