From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EC429D7237B for ; Sun, 25 Jan 2026 22:46:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=T0uYuDawIuSakwMNgLfCLy6eMUt5j4Ha9df3QbztFEQ=; b=Qy0QJ7O9Ga+O1vQtyr16y77TAx 2VM0yC9HxZdLoY36XwKB3kkOYgGzzXrJqOlYtEpYimRncLgF8kBhhM0uafQ6Ea9YKDQdrcUkJwvrF /SlKFyqwtvYUXKL4LsfNDH0HBCkuq3ABBoJJoZyYXXbFHPifGIXtLb6jPKTUABYKgTMUiJsSsYDP3 xo0h1NmhneA8RC86eGSk6NmKSV1l0yFJdduNHsMN24DiHhDZgxWONTo9WLium0uO9ARv00l/ZTVWd jJz/5vdM7BB2sLY+ZSuip/j+fJZuw76fNVWH49VLffeq6qPOQ+stXkAlpMsBNmmkYXqYBZ66kucUY aOSytPCQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vk8sN-0000000BbFX-04zU; Sun, 25 Jan 2026 22:46:35 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vk8sL-0000000BbEf-2DwM for linux-arm-kernel@lists.infradead.org; Sun, 25 Jan 2026 22:46:33 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id EE34C6011E; Sun, 25 Jan 2026 22:46:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AF0DFC4CEF1; Sun, 25 Jan 2026 22:46:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769381192; bh=JkXt23imzQZBGJmS8wrmieQIzrgOcUkUTqGUwsGlyvE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NCo6OzUj+5z3fShzlerTKOSi2VNbYcycL73l2Toam+tXKL7QepiGm0M5uE/Xi1HOh w2+ws74ssU/HLOIjxZzVMs/CmT6qgAn9fIh96Bx+sDrWJI4jFGVdKg+lZv/O93VtnH TDxUomhuOznH6kr8UuKgl6kN+9fdrwQuWAzEytGAQypm0VJUb07laV/4EqjL7tO7Ao YllT0BwcdqB9VtbIAtFxxVD3VrldCqAofRvgCKc8w8Lj76cpGgjpsEpOAcAb/M/QoC riI4/A8lGc+aQKBYnirPNe+usCyzAlKT4TFQLdhiP7FTQnsDCL4g1rcUJlBZBV16sl H9KSW5ZtAXQ2Q== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , =?UTF-8?q?Michal=20Koutn=C3=BD?= , Andrew Morton , Bjorn Helgaas , Catalin Marinas , Chen Ridong , Danilo Krummrich , "David S . Miller" , Eric Dumazet , Gabriele Monaco , Greg Kroah-Hartman , Ingo Molnar , Jakub Kicinski , Jens Axboe , Johannes Weiner , Lai Jiangshan , Marco Crivellari , Michal Hocko , Muchun Song , Paolo Abeni , Peter Zijlstra , Phil Auld , "Rafael J . Wysocki" , Roman Gushchin , Shakeel Butt , Simon Horman , Tejun Heo , Thomas Gleixner , Vlastimil Babka , Waiman Long , Will Deacon , cgroups@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-block@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH 05/33] sched/isolation: Save boot defined domain flags Date: Sun, 25 Jan 2026 23:45:12 +0100 Message-ID: <20260125224541.50226-6-frederic@kernel.org> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20260125224541.50226-1-frederic@kernel.org> References: <20260125224541.50226-1-frederic@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org HK_TYPE_DOMAIN will soon integrate not only boot defined isolcpus= CPUs but also cpuset isolated partitions. Housekeeping still needs a way to record what was initially passed to isolcpus= in order to keep these CPUs isolated after a cpuset isolated partition is modified or destroyed while containing some of them. Create a new HK_TYPE_DOMAIN_BOOT to keep track of those. Signed-off-by: Frederic Weisbecker Reviewed-by: Phil Auld Reviewed-by: Waiman Long --- include/linux/sched/isolation.h | 4 ++++ kernel/sched/isolation.c | 5 +++-- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/include/linux/sched/isolation.h b/include/linux/sched/isolation.h index d8501f4709b5..c7cf6934489c 100644 --- a/include/linux/sched/isolation.h +++ b/include/linux/sched/isolation.h @@ -7,8 +7,12 @@ #include enum hk_type { + /* Inverse of boot-time isolcpus= argument */ + HK_TYPE_DOMAIN_BOOT, HK_TYPE_DOMAIN, + /* Inverse of boot-time isolcpus=managed_irq argument */ HK_TYPE_MANAGED_IRQ, + /* Inverse of boot-time nohz_full= or isolcpus=nohz arguments */ HK_TYPE_KERNEL_NOISE, HK_TYPE_MAX, diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c index 3ad0d6df6a0a..11a623fa6320 100644 --- a/kernel/sched/isolation.c +++ b/kernel/sched/isolation.c @@ -11,6 +11,7 @@ #include "sched.h" enum hk_flags { + HK_FLAG_DOMAIN_BOOT = BIT(HK_TYPE_DOMAIN_BOOT), HK_FLAG_DOMAIN = BIT(HK_TYPE_DOMAIN), HK_FLAG_MANAGED_IRQ = BIT(HK_TYPE_MANAGED_IRQ), HK_FLAG_KERNEL_NOISE = BIT(HK_TYPE_KERNEL_NOISE), @@ -239,7 +240,7 @@ static int __init housekeeping_isolcpus_setup(char *str) if (!strncmp(str, "domain,", 7)) { str += 7; - flags |= HK_FLAG_DOMAIN; + flags |= HK_FLAG_DOMAIN | HK_FLAG_DOMAIN_BOOT; continue; } @@ -269,7 +270,7 @@ static int __init housekeeping_isolcpus_setup(char *str) /* Default behaviour for isolcpus without flags */ if (!flags) - flags |= HK_FLAG_DOMAIN; + flags |= HK_FLAG_DOMAIN | HK_FLAG_DOMAIN_BOOT; return housekeeping_setup(str, flags); } -- 2.51.1