From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 25A8F38F658; Tue, 28 Jul 2026 04:12:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785211981; cv=none; b=HJjZsay2azNYRlPCml105/5J4yhvIig6qjraC0+q3bbUeETwEJckRsF7nrYaX+8jZ8xvns5fQzXdOXCJjO1JCIfWwkLBUpiD5NGf2OVB6oZHetqGNEqpklPRSU3EflB+L2I5E7ZvVjyuq8zwuWTLJMj2DQMs74jb6KQWeC6ZTGE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785211981; c=relaxed/simple; bh=g/tFPfelQzKUfzsRZPs73xHoniRK3oTmoDYddCctcSI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=s4/H9CIZlKGk+qUex0BUXjbyae9XA9h9JOKAU6Bikdwp/8VEzUCKAvnezkHcbGxUEk4ISzJA/0HrwnkQLbZaolGFqElbWTIWsXBEwo5gHFsj5p5YX/IagPG6r9Be35eQwYrDRWgYo3k4Pj6/87tCCcg2Rp58jAXKtlOCBkLa6As= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=C2dEu6gj; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="C2dEu6gj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BCB181F01559; Tue, 28 Jul 2026 04:12:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785211978; bh=PjqVhtQyye+bbFZP93YpIQ5LAq+rT1MA3lQj7bnBnXw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=C2dEu6gjew1sVQ013U5ot8/JjImPQeDjvFR0hp+Iopv5PLuzrtXdaOvhgaR2GN2Mx C3w/uBFrEcR8RpvqhEbDpb5pUthMDyB51JLJLNRXo1QWLM57qdWcEWAQP0szxHHiwN dKRJhmXOE4OhELaIT4jRHArdzIf/brcx2EEI7UY4KVFUWElGBYFiF5Qslk9yMBI0IB GoWsbFcsAM7L1Je2u293J5h6EsNtr8Xxl9aSOGV1id2t/z57eQ85WIztzeajuKRzHy x/WGD3/dQvIjTxLyBa2AgcVCuCMLxiCqdDf+NAignYJL+FPOFcZ2xvNwd3m8j4nIxY 9jKcuznFyodTA== From: SJ Park To: Cc: SJ Park , "Liam R. Howlett" , 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 v2.2 16/17] Docs/admin-guide/mm/damon/usage: document probe preps sysfs files Date: Mon, 27 Jul 2026 21:12:37 -0700 Message-ID: <20260728041242.187380-17-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260728041242.187380-1-sj@kernel.org> References: <20260728041242.187380-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Update DAMON usage document for the newly added DAMON probe preps sysfs files. Signed-off-by: SJ Park --- Documentation/admin-guide/mm/damon/usage.rst | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) diff --git a/Documentation/admin-guide/mm/damon/usage.rst b/Documentation/admin-guide/mm/damon/usage.rst index da5f9afd08aef..023c6334024f8 100644 --- a/Documentation/admin-guide/mm/damon/usage.rst +++ b/Documentation/admin-guide/mm/damon/usage.rst @@ -74,6 +74,9 @@ comma (","). │ │ │ │ │ │ nr_regions/min,max │ │ │ │ │ │ :ref:`probes `/nr_probes │ │ │ │ │ │ │ 0/weight + │ │ │ │ │ │ │ │ preps/nr_preps + │ │ │ │ │ │ │ │ │ 0/prep_action + │ │ │ │ │ │ │ │ │ ... │ │ │ │ │ │ │ │ filters/nr_filters │ │ │ │ │ │ │ │ │ 0/type,matching,allow,path │ │ │ │ │ │ │ │ │ ... @@ -283,9 +286,18 @@ In the beginning, this directory has only one file, ``nr_probes``. Writing a number (``N``) to the file creates the number of child directories named ``0`` to ``N-1``. Each directory represents each monitoring probe. -In each probe directory, one directory, ``filters`` exists. The directory -contains files for installing filters for the probe, that is used to determine -the data attribute for the probe. +In each probe directory, two directories, ``preps`` and ``filters`` exist. The +directories contain files for installing probing preparation actions and +filters for the probe, that are used to determine the data attribute for the +probe. + +In the beginning, ``preps`` directory has only one file, ``nr_preps``. +Writing a number (``N``) to the file creates the number of child directories +named ``0`` to ``N-1``. Each directory represents each preparation action. +Each directory has one file, ``prep_action``. The preparation action can be +selected by writing the name of the action to the ``prep_action`` file. Refer +to the :ref:`design doc ` for the list of +supported actions. Each probe directory also contains ``weight`` file. Reading from and writing to the file gets and sets the :ref:`attributes-only monitoring -- 2.47.3