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 598CF26CE04; Thu, 1 Jan 2026 22:14:54 +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=1767305694; cv=none; b=JqFv+v/PQV/l+zTgv3/PgbdRwwKVSS/8G/ikpMJ3b6giK23Ot9HPTdhhrNFMbkn5P5xM4gJAdBkvEPSpXdv2dk1nA1bg4GgP6UO0WZAJ95kqlwdhL6emLiOQl9kdiCI5aoruD01NH/baYNq38Hw0vBh1AZUBoK6qPL5IGJEyV3c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767305694; c=relaxed/simple; bh=HhWObUaCwi4bgCO3C817jvURXsArjqmd8mmB3XQmmVY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Nm23HRPQOr3AryBWXAP9VzhFFcIZeHwlX/pySUolgk/mTnlAiNJOUMwoVFRh/GvGN3wTw9ys8IYsRY4xMkGrylXV29WaZYlE6lwyH3Fr5QJNuPAokumNpxQfBUiacAo8WtZHnRgcCGRlv+iyrALMYujevkPgnGKY/1tNpuYVe30= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hThhxW/r; 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="hThhxW/r" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DE100C116D0; Thu, 1 Jan 2026 22:14:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767305693; bh=HhWObUaCwi4bgCO3C817jvURXsArjqmd8mmB3XQmmVY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hThhxW/r13awo16phbPQQ5e18yCVLIuhRzdsJIdU5vBKwFF6zis9e1PhqvNKeiaxE yNXDpt710ACQOYxh2GmJjvjzcHWU5Gd1xag5ereyYbgGEFnlSpeP8vAXu680/2diLX jo6v8CAvwNQTOAN0oaMH7e8idLVQhK/qSovtp8T/kaGnIkp4hP1m0QX0GPK2fjYvt8 7Za/OOJXaPJAarRlJy/HwZHD+iehQY2If61pGgbQr1X2ZCi82h3YyWRj3IzO0pDQz0 0+lv7FiSQ8XZfglJirakzrVfN6V0hzAM3xpAbnWoi0mG9peAtd27xWuskx9SkgyJNC SpF1uI0hnPzkA== 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: Thu, 1 Jan 2026 23:13:30 +0100 Message-ID: <20260101221359.22298-6-frederic@kernel.org> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20260101221359.22298-1-frederic@kernel.org> References: <20260101221359.22298-1-frederic@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- 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