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 2BE7C2E22B5; Wed, 15 Apr 2026 10:47:24 +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=1776250044; cv=none; b=uUyAi+0Eabkh94TOwwAD1iTZuImSfJuLnuUCbT4FN2mPi86lbJi786+ZtVUTK1Ls7+pyJf+OKlcf1nQBnko1p0ppeMZksvD8yd3ahUsJLQ0w67Av/GIGfBlZs59okAcMXfmbGFQ87oX7y70aYU6yFwMCZK5IbEr/9W0IvM8G5lE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776250044; c=relaxed/simple; bh=NPkH3odK+y9+Iw7bAZA8ca0+l9lmm7YtInB3PhCdnWw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=IG0Kbgi+Pj4T6SwFuYOTHwlLdhWTMH2u+GCyXW8Y+db61aIPuUWHcO+cn943h+n6VBfSOlJN7lIRMXw9iTXV5fcETmnXpk95nCSXZW/yIkfD3Bz5kAG4EFkjCj7MyecOn1gOA1Ncmyt/D1HH+Dopmsmx2WSaHOffqP7WvFNEsEg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=X5YaRU94; 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="X5YaRU94" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 65598C19424; Wed, 15 Apr 2026 10:47:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776250043; bh=NPkH3odK+y9+Iw7bAZA8ca0+l9lmm7YtInB3PhCdnWw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=X5YaRU942uo88Bz6wJUMEWxPz7pezQji73dhxljy8WgWWZ4oFdKiaj8kuMNQbpe3g ejnm2n6TJZKu8Fd24uQcxpxMMqjKvNdrdpr4FHtvEB//unXAmXS78psdWFCgHAur1x OlSYp1JF8WOOKOzMujadJS5MzqtSAzCtYc1SrfM/mOMdLeZKjOha+BWUJq/nwn0ozM +UXqlvJ86RrNkIoid3QazzX3gIiOsPBYSGxbFbfNNW6/iOkHBa0tVVcc0SWWG6iHuf 9yoEIMUTqisydm7Ql118U3OEEwU2vjENDOZNeM1go+4dNgInjFn2laS5salb/EiDaN qOJiF4UAEw3Tg== Date: Wed, 15 Apr 2026 12:47:21 +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 , "Paul E. McKenney" , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Anna-Maria Behnsen , Ingo Molnar , Thomas Gleixner , Tejun Heo , Andrew Morton , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan , Waiman Long , Chen Ridong , Michal =?iso-8859-1?Q?Koutn=FD?= , Jonathan Corbet , Shuah Khan , Shuah Khan , linux-kernel@vger.kernel.org, rcu@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH v2 07/12] sched/core: Dynamically update scheduler domain housekeeping mask Message-ID: References: <20260413-wujing-dhm-v2-0-06df21caba5d@gmail.com> <20260413-wujing-dhm-v2-7-06df21caba5d@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@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: <20260413-wujing-dhm-v2-7-06df21caba5d@gmail.com> Le Mon, Apr 13, 2026 at 03:43:13PM +0800, Qiliang Yuan a écrit : > Scheduler domains rely on HK_TYPE_DOMAIN to identify which CPUs are > isolated from general load balancing. Currently, these boundaries are > static and determined only during boot-time domain initialization. > > Trigger a scheduler domain rebuild when the HK_TYPE_DOMAIN mask changes. > > This ensures that scheduler isolation boundaries can be reconfigured > at runtime via the DHEI sysfs or cpuset interface. > > Signed-off-by: Qiliang Yuan > --- > kernel/sched/core.c | 23 +++++++++++++++++++++++ > 1 file changed, 23 insertions(+) > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > index 496dff740dcaf..b71c433bbc420 100644 > --- a/kernel/sched/core.c > +++ b/kernel/sched/core.c > @@ -39,6 +39,7 @@ > #include > #include > #include > +#include > > #include > #include > @@ -10959,3 +10960,25 @@ void sched_change_end(struct sched_change_ctx *ctx) > p->sched_class->prio_changed(rq, p, ctx->prio); > } > } > + > +static int sched_housekeeping_update(struct notifier_block *nb, > + unsigned long action, void *data) > +{ > + struct housekeeping_update *update = data; > + > + if (action == HK_UPDATE_MASK && update->type == HK_TYPE_DOMAIN) > + rebuild_sched_domains(); > + > + return NOTIFY_OK; > +} This is already handled by cpuset isolated partitions. Thanks. > + > +static struct notifier_block sched_housekeeping_nb = { > + .notifier_call = sched_housekeeping_update, > +}; > + > +static int __init sched_housekeeping_init(void) > +{ > + housekeeping_register_notifier(&sched_housekeeping_nb); > + return 0; > +} > +late_initcall(sched_housekeeping_init); > > -- > 2.43.0 > -- Frederic Weisbecker SUSE Labs