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 24A9ECCFA13 for ; Wed, 5 Nov 2025 21:04:53 +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=FC/fyZ8C9xRdWYPMtkFbwEq+3j0Lh4Kf9aUPI+WedvI=; b=wMP9TBc0OU3MYrBPhf9MtjY/zW LGKcfkGl8XGKShkzF+l4NlH1xPZumW4gu6wCki/HS6mnNhpVmWij0oeuRbcojnwdvtO0VQkz5FwoO efz4NZ+CT7TBWKKx+yNtuGVUJfCvBfnzPxh3o6i5dNs2zpoNGnJLuvo1hRKj2LDPQcmgq7slu4l72 8DiWEKAMixgiYkOlchfCYtyuA/fteD15ydBhlTs61oowbLWec4kneQRoLkRjrAmBDX0pOyG+JHvAR QtVpwvv1TSLg++/bZelSHNVfgAdwihdIETNSpS10my1m9WUkI+VzaUCr0joQS1+5UHMnwMAHodx5b rxvqmGNQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vGkgP-0000000EPwh-0Uj6; Wed, 05 Nov 2025 21:04:45 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vGkgM-0000000EPuc-11O6 for linux-arm-kernel@lists.infradead.org; Wed, 05 Nov 2025 21:04:43 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 9C44B44651; Wed, 5 Nov 2025 21:04:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CC92FC116D0; Wed, 5 Nov 2025 21:04:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762376681; bh=vCqQjRKewdSvMhojsrACl76twRmsMBvlBV6cm47g7uk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=T5kGeur44NFLworbF2dzO61n4fKCzm2Vesu/gMHqpcwG2IH7hRGsS9PE3e3XFJnQC J0x2USmpchyTqj1LejPMzaUkNNfX70M3i2D7ma/ibICB95gMSZHSQ1EFwshSOEi0w3 Y2xGpqy0WEnVnV5hr5rHANSN95LQq4K0VBQdv8Bpc5HhxD51Fp/g/DRMKEUmJSI5CF B9gp8T6FWJNEKckRpqLNdjGecevv0JO7AyVADISC9OI6I7LsupnxmUoheiOeM/E5ra KXQhbVGao3xX3Opx9iLWtpyIpgQtuSCz1guXSJCOca83e+ubrEX1RpgKRH5FBPyQ5/ wWGOm2PHDKFtQ== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , =?UTF-8?q?Michal=20Koutn=C3=BD?= , Andrew Morton , Bjorn Helgaas , Catalin Marinas , 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 05/31] sched/isolation: Save boot defined domain flags Date: Wed, 5 Nov 2025 22:03:21 +0100 Message-ID: <20251105210348.35256-6-frederic@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251105210348.35256-1-frederic@kernel.org> References: <20251105210348.35256-1-frederic@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251105_130442_322158_B0CF960B X-CRM114-Status: GOOD ( 14.79 ) 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 --- 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..109a2149e21a 100644 --- a/include/linux/sched/isolation.h +++ b/include/linux/sched/isolation.h @@ -7,8 +7,12 @@ #include enum hk_type { + /* Revert of boot-time isolcpus= argument */ + HK_TYPE_DOMAIN_BOOT, HK_TYPE_DOMAIN, + /* Revert of boot-time isolcpus=managed_irq argument */ HK_TYPE_MANAGED_IRQ, + /* Revert 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 a4cf17b1fab0..8690fb705089 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), @@ -216,7 +217,7 @@ 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; } @@ -246,7 +247,7 @@ 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); } -- 2.51.0