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 6B9E118C2C; Sat, 2 May 2026 02:05:15 +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=1777687515; cv=none; b=fS9Rn6Z58ZaA4+RXHf6nqB7qd+orOnOjhyiySFUapd7dJP5nChOb2nL2IjdgmVlb5NRFtX1vWwF2udXEwVErCKwJ1g2XMTAZLJ/ZgSAm4wvHDoGom1Lb81az3T9rBmk+cRF8gMAMQWGf751A2oB4iY4V9zq3BsD2FwTWJI8vn7s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777687515; c=relaxed/simple; bh=fB1OcL3ViFGZJkDKi9eqU2TPDeF3kgjENu7ZrO+s+Pw=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Ll1SG+gfPany130qsIj455QSTEHu47J8le/N1Pvtd/iuDla7/zQR/CnMkB1VSC0lnKA2aE6uEtD2RN8H6NOz6NGZ+P+LAZSJ5XFq0IKswR7WeZzNd6VB13cg0tcoEo/DsgEW26ml93JJYPEJc4Bz3x7avwB3M512X4pGb4MXw+4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=osX1ugss; 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="osX1ugss" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6190AC2BCB4; Sat, 2 May 2026 02:05:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777687515; bh=fB1OcL3ViFGZJkDKi9eqU2TPDeF3kgjENu7ZrO+s+Pw=; h=From:To:Cc:Subject:Date:From; b=osX1ugssVOVSVakmAnzjJ/AYdjcwM6kU+ht+by/Scg/ZCIvcCi7GH7XXWkpICn0CL QJwcKW4i7QRz4bhrRZtB5Oy1xgjRvNIZGHem63fFTDXpigZFSBL8BgXkT7AcjZCP1u Uljw/JXYvTleDEDeqAeduMkhRR1N7pAYTdBJxzsQMs3le++zQ0h+oIx9hYDpgkxlbm AwCrVFtXzNas/mQzlpiiO3vZD5KM2l0/tqbKYKNGnhPK+t3J0rAQQwVobvovhJfTv6 qbrlflMp5PdnjfC1gZvu9YFXMqR/WrU76HlBo0U5U7mAC5fQJtWeo5EIJKGSnSXeG1 AS6pfezDKcVaQ== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , "Liam R. Howlett" , 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: [PATCH 0/2] mm/damon/stat: add kdamond_pid parameter Date: Fri, 1 May 2026 19:05:02 -0700 Message-ID: <20260502020505.80822-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: linux-kernel@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 v2.1 - v2.1: https://lore.kernel.org/20260430142013.80993-1-sj@kernel.org - Add parameter description. - Rebase to latest mm-new. Changes from RFC v2 - v2: https://lore.kernel.org/20260425203309.108879-1-sj@kernel.org - Rebase to latest mm-new. 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 | 39 +++++++++++++++++++++ 2 files changed, 46 insertions(+) base-commit: c9d6cc2ef4bef0a86002460ee8c39a1c76b3f1f7 -- 2.47.3