From mboxrd@z Thu Jan 1 00:00:00 1970 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 E0C262EA172; Sat, 25 Apr 2026 20:33:18 +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=1777149199; cv=none; b=lC4MjgCw10yRwOqYRk/SgKVAYefEAmpPcbld+35wu+Cc0j++uC2oeaJmooVu1Xl0vd0/hz2hs+sheGqyN5xnAFU6fKKNJptXRMeh0L6itJZsktDQGhRS70+a2GUFHLssqgOHKnGlI2RCYyxVSEZ61imdODScT+HzMNj6e5P2mWc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777149199; c=relaxed/simple; bh=CjM5lHlUhKQqvVPvH7UjU4XdbEsk9yGpjrvSpB7psBw=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=JwMQrjqRzwv7t0aOzjviVztEbstIOL/0nMNfGCzXPyjnOUDX0HE0ccywBHxifv/Cuq65Xl+cIXXuuN7hDJ7aOoJq/rhf8ZnwayZbCMUBV7CbZICS3mhGUKVUrKudnvj3H87lYUeD6uI1yOX+r4zyAbm892zesWUnFWtQwww3WxE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ISMfSf8B; 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="ISMfSf8B" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EE07CC2BCB0; Sat, 25 Apr 2026 20:33:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777149198; bh=CjM5lHlUhKQqvVPvH7UjU4XdbEsk9yGpjrvSpB7psBw=; h=From:To:Cc:Subject:Date:From; b=ISMfSf8BKWaQOyhRKMyF1fdfzSjS6trY71nemW+erw60DWG+tyXf1QJGLa36u79WG XhFSPMfUCdO7cTgp+8EAcJH9gYB1iVv19yJARhMo9rNZ/aKsVOEaUW8cFYn94qvVlA Bdj/N2gio+kSw4fT4UrP8rsExEgqHZkSX2AfLDyouuop8mS+YE9Zo8LLApj5nj7EZx 5RK3jsK2xCcIwYdXmUPvDe1WrmZRYlt40hhifvJFVvHb5MaJfkJjUV6+G0Q5n8DHJh QAzhTrz8+YOmLNth0V21SWMysRzYa/Ugi171v9dqdQY+oZddFr6jRJGJVaIgFDeE68 x9oc89H1ZOQuQ== From: SeongJae Park To: Cc: SeongJae 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 0/2] mm/damon/stat: add kdamond_pid parameter Date: Sat, 25 Apr 2026 13:33:05 -0700 Message-ID: <20260425203309.108879-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit DAMON_STAT doesn't provide the pid of its kdamond, unlike DAMON_RECLAIM and DAMON_LRU_SORT. This makes user-space management of DAMON_STAT unnecessarily complicated. Provide the information via a new parameter, namely kdamond_pid, and document it. Changes from RFC v1.2 - rfc v1.2: https://lore.kernel.org/20260416002149.87090-1-sj@kernel.org - Detect and use fresh kdamond pid. Changes from RFC v1.1 - rfc v1.1: https://lore.kernel.org/20260414235912.98174-1-sj@kernel.org - Close the parentheses of error handling block. Changes from RFC - rfc: https://lore.kernel.org/20260414053742.90296-1-sj@kernel.org - Fix damon_kdamond_pid() failure handling. SeongJae Park (2): mm/damon/stat: add a parameter for reading kdamond pid Docs/admin-guide/mm/damon/stat: document kdamond_pid parameter Documentation/admin-guide/mm/damon/stat.rst | 7 ++++ mm/damon/stat.c | 38 +++++++++++++++++++++ 2 files changed, 45 insertions(+) base-commit: 4eb752fe1ea250a5339f1e70398c5fa3a18afb87 -- 2.47.3