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 1096D351C22; Tue, 31 Mar 2026 09:40:34 +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=1774950035; cv=none; b=kaM5VkK4WwMaEpdwBrDywzBYRTg9ko4+rsaAqJFWDJ6Uwvp6mjR8EAijm/bwc55wRWF4OOdX7nZ522hE4tyZuVHrlyK5Izwcq/eq+hUBgiU2rUgETftz3Bsc/85mDwY5g3Ti0+e5E/Zsv+Xypkb65tW4iXSwPgEe65ROPdm+Hkc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774950035; c=relaxed/simple; bh=uJMOWgINMXub8AP/Kf/qJSBe/DsTYp4xy6LyAUAYweU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Zys3/ZyqtyhPxoGzYSxtvg7w8K3di1sIccdrVu4iKrHPAwot0E+xpQTKHg4wxNb6WtZlbTHAme1zW51mvQdj9KMDkObMBFCt8SeT/+wKfJU6pmqCBvBZSRVxmWePcAXY5p0Ell6ywzaPBFXywCPYMNjmLyHyEQFDnQY+OGCjAbM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Vi8vFZls; 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="Vi8vFZls" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 30C4AC19423; Tue, 31 Mar 2026 09:40:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774950034; bh=uJMOWgINMXub8AP/Kf/qJSBe/DsTYp4xy6LyAUAYweU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Vi8vFZlsgoCOH/wPS5qHFh+9FlxjtYdO3E6n4rykwKM/RFhjQSAm2r0FAcCfmxanX 8cDLuK9RMpqSLWUMKTYfvECTFdHSJ0adVPlDrHbPx18NGRCvaHyN65bWIGcLnoIfVY 0C4giDsiuFPLuJ/vb4OkMsYv4rOxn15A8xHyWPVgoneACXn7syXg2Wm1YWElxFnNSW 8lxDHaY7Q9beZxlUPgtPs67a4ginIchALCbX8EkYz6uBIYr3k805VD1JadWExZQR9B obrhXR5VgZKWF1oYiRiT1wHxL/MTXg+JqgNaWWaTwUnQM3/bAnX3LoJQPWCzmCJjEj oCogtt1sZFE1w== Date: Tue, 31 Mar 2026 11:40:32 +0200 From: Frederic Weisbecker To: Qiliang Yuan Cc: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Thomas Gleixner , "Paul E. McKenney" , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Tejun Heo , Andrew Morton , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan , Anna-Maria Behnsen , Ingo Molnar , Shuah Khan , linux-kernel@vger.kernel.org, rcu@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH 09/15] mm/compaction: Support dynamic housekeeping mask updates for kcompactd Message-ID: References: <20260325-dhei-v12-final-v1-0-919cca23cadf@gmail.com> <20260325-dhei-v12-final-v1-9-919cca23cadf@gmail.com> Precedence: bulk X-Mailing-List: rcu@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260325-dhei-v12-final-v1-9-919cca23cadf@gmail.com> Le Wed, Mar 25, 2026 at 05:09:40PM +0800, Qiliang Yuan a écrit : > The kcompactd threads are affined to housekeeping CPUs (HK_TYPE_DOMAIN) > at boot to avoid interference with isolated workloads. Currently, > these threads do not migrate when the housekeeping boundaries are > reconfigured at runtime. > > Implement a housekeeping notifier to synchronize kcompactd affinity. > > This ensures that background compaction threads honor the dynamic > isolation boundaries configured via the DHEI sysfs interface. > > Signed-off-by: Qiliang Yuan Unbound kthreads are now handled by HK_TYPE_DOMAIN dynamically. Thanks. -- Frederic Weisbecker SUSE Labs