From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dl1-f50.google.com (mail-dl1-f50.google.com [74.125.82.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 08F21397688 for ; Mon, 13 Apr 2026 07:44:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.50 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776066278; cv=none; b=qFkJeN64eLRDwB4YMhx0nm/BmgcL0vrXgnbgunXfS+eIUcpItJcmmv4WvULFCY3L+SX17N80PVPtFO7V0qWezTvj8kxBJ4SUL8NNTJ34o+OLg9owr/w6hPYA98uvxOFYA0iZV8dsFEHbT5J/R7VPIIESNSmxBAxE0LrJntnhNDg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776066278; c=relaxed/simple; bh=fwh11Z5Rw9aSnpZTME81tDT+ucj23bt65tyOS18FZ6o=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=anjECvR0Q5KTP4P1YoM51hQ4KRKTM5gVc5FqBIL+e1sXNdwx2p0me7yJPneQfQGi3xHhB+3PdkAgaRdeH8sdHxHYfll62YH5DUb6wLl4SiFvl/d4caS15cKh1KiM5gYXtRWsG245s0kbCtVnb1u2Tg6AQsv/Ya8CHqVSsiLD6TE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Uu5CiQUF; arc=none smtp.client-ip=74.125.82.50 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Uu5CiQUF" Received: by mail-dl1-f50.google.com with SMTP id a92af1059eb24-12c1a170a50so3667984c88.0 for ; Mon, 13 Apr 2026 00:44:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1776066276; x=1776671076; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=gWLi6Bh6Nz5J4yZhvIk8yyG7xG2dO9eEtzSyvnHXfpA=; b=Uu5CiQUFgwT9Tvcyp1y19u4pKgl6VHALdbdGT+LYNFMG2dSQ30/UlRH2NsohD3TBVH t5/6gTTTUNbYW4Ysza1zsf+c+FRxo5qXfaANKR+s/HW3YmREBqfWo7Q5Yn1KlYqpWCtg lvuRvG6lo5hFbrJUW4bjFnWSSzwogvvIODmQHj2pA8cNO9OaNBw1lK/LzhxMojpf4m6Z K94b9zXWN6e84oiq0nSflOVeFcCEDXqaO7Hjo5GwzK62iBvMZ7qtYbkqKbjA3QY2v8Xc Kvs0r8BvzkZoLXpiNIqurD4uPxN6MvdYF9YAGYMgdXDvom5ob34Q1NuWtDsO4Gr2JxpK N99g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776066276; x=1776671076; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=gWLi6Bh6Nz5J4yZhvIk8yyG7xG2dO9eEtzSyvnHXfpA=; b=VwTP8O7yjSKc/5KXyzRlpiXvqjm8FY4vOLs69t6yGCgMJlIik1R3s+zp79slOZg010 S0wOZMOf2rwFgrOeuGwcqTpoNC0p5oTtjT4ZbtFhgPUjoCOYAnuF6U8wyf3/OpilB40H /GKanmyR48UxkVFWn+gr2E21BximTQoamsLKcjmSZm3DeuYDTGFdkitan2mLXWio2ogP 3sxlRPEVhtCdzblENTTkrbmACjfkUXajRLeMPy+PuK6yT7BNnsN30Z0mctlISzumjpJK 4POWyRML2E57fpqGoDNkMfwa8jlPrNnDrJtAExR5DYPwyOYLT2glHeBysN2gW6iGVoR0 rWTw== X-Forwarded-Encrypted: i=1; AFNElJ89apPW61X+wT1Jo8C0wynCDS/syTL/u2vkwjE8n8XVEbcY5dihJBoBfcb/7Kb3LfCtNZ8=@vger.kernel.org X-Gm-Message-State: AOJu0Yx4DSaaCzwbke+GIeOgihHjfLYNPmPNIXDCgBOJj6A/0rtU8U4E Drgj0Srf0O+xtNVE/w8E5Sj28eAeW1cz5QSHpycmjWvlV5xuwX/4BqH2 X-Gm-Gg: AeBDieudTEpps6WD4sTkAmqqVTmwYVfeairnfmpj/7P0cBxEsYPue3l8IQoFbgb5Zwg YmnY02dZKD2Ds2pGC7NUQSpTK5nq0v1oP7qyq0okU200cNd665BlfpFECpz49BwVOS92aUH7PHV mz0lelp0MYI9HU45NUxvH1Iz5xRp49HwUvCNL9QO6oK21z8oZoZjgTnAT0n/F9tdevHtAxBmCgh tsodmC7CEnp983fWcmgWsQFE3YOk8UaWkRw5Ydner3pS6N8MzflphsDZQDjE6XANnLQiULYI1JV dS39zZ5Cffb4reUiuUZRAcVYN8eDkfuGr+QfmavBt0iYTV6Dg7tkJcSUbg5I5C88d+lQT4/Zkyx hsmEY7t1UKtoXU1yhanDc+EWFfYLdOaWpVRr2s1YRm0e4Y/rP4bsltuZS06V4BVPJ6Qodn/VTKP eJInOy+U9Cux+ah1eI X-Received: by 2002:a05:7022:6725:b0:128:d23d:81a7 with SMTP id a92af1059eb24-12c34e68fe3mr6219069c88.6.1776066276106; Mon, 13 Apr 2026 00:44:36 -0700 (PDT) Received: from wujing. ([74.48.213.230]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-12c347fa2c9sm12884610c88.15.2026.04.13.00.44.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Apr 2026 00:44:35 -0700 (PDT) From: Qiliang Yuan Date: Mon, 13 Apr 2026 15:43:13 +0800 Subject: [PATCH v2 07/12] sched/core: Dynamically update scheduler domain housekeeping mask Precedence: bulk X-Mailing-List: rcu@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260413-wujing-dhm-v2-7-06df21caba5d@gmail.com> References: <20260413-wujing-dhm-v2-0-06df21caba5d@gmail.com> In-Reply-To: <20260413-wujing-dhm-v2-0-06df21caba5d@gmail.com> To: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , "Paul E. McKenney" , Frederic Weisbecker , 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 , =?utf-8?q?Michal_Koutn=C3=BD?= , Jonathan Corbet , Shuah Khan , Shuah Khan Cc: 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, Qiliang Yuan X-Mailer: b4 0.13.0 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; +} + +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