From nobody Fri Oct 3 15:35:59 2025 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 0AE823314A7 for ; Fri, 29 Aug 2025 15:48:36 +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=1756482517; cv=none; b=n/CA+QAFNfqKWGHPWpNxUby8RRQzwwEAj0MGQ9Aqk+yI8yQU9LfoD9QfYOSyqWf9vPn5PX/ckcWQ9uGgh4yEeeyfMLI8ijlFnxuAR9LWUMDkJsVVvQpFG8lWqfcMErbCdXWkMJ2vUxuNcfADMmVdRzCaM2YSMgoZkAjKsaLyg9Y= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756482517; c=relaxed/simple; bh=YqIjpVaY5D0ks0POHkX9szyfGsLXZLStsFdd5bGAgPs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=D6shwqHaoWmm18qXQT8YDJ5griLoxg7pM8+guKZ7mNFNlI+vlLl6gqydass3ejjy9UjS72RAPpZubj05TESBRskuATyDT9vJgLwERDrSqE1SX7KDP4l2byG3Kq88gpAerbxBvWzCMxVBwwRNXTzNWLRdjTzJ8sUReRz3Ys49whg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=mYqJB6IP; 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="mYqJB6IP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 85E13C4CEF5; Fri, 29 Aug 2025 15:48:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756482516; bh=YqIjpVaY5D0ks0POHkX9szyfGsLXZLStsFdd5bGAgPs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mYqJB6IPNNUciPYkOIHvqfSulF3gPDnDb22Q5YExqL+GXCfA3hr9bXcTxWXfK8NDy fM4Dg0JRSqe3pMHJI3xTd74WnFm9s/nAHxTRypSuf6mazdlJQgRdQODOn4yZe8wIvV 3i3zZVVDiDgPJY8Gue2WRHq8fJHTAVdBDk1Wp0FUT/i5bbDFD0oG9AqMCp3+GuO1Ue xbgidQrxS6ErGnHMXMEb6HZ8DdJ+gzhWBZMtAxdKihoNrCNp3kdbYZdembO7xsORlY HivMSjCcJqj8nJXLJiTmFEpvxmWI4W4F0AHBk9bFC4Fox8PVbjoPKCK5cYao1ZiSR1 JrBQ69q2HPDmg== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Ingo Molnar , Marco Crivellari , Michal Hocko , Peter Zijlstra , Tejun Heo , Thomas Gleixner , Vlastimil Babka , Waiman Long Subject: [PATCH 06/33] sched/isolation: Save boot defined domain flags Date: Fri, 29 Aug 2025 17:47:47 +0200 Message-ID: <20250829154814.47015-7-frederic@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250829154814.47015-1-frederic@kernel.org> References: <20250829154814.47015-1-frederic@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" HK_TYPE_DOMAIN will soon integrate not only boot defined isolcpus=3D CPUs but also cpuset isolated partitions. Housekeeping still needs a way to record what was initially passed to isolcpus=3D 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 | 1 + kernel/sched/isolation.c | 5 +++-- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/include/linux/sched/isolation.h b/include/linux/sched/isolatio= n.h index f98ba0d71c52..9262378760b1 100644 --- a/include/linux/sched/isolation.h +++ b/include/linux/sched/isolation.h @@ -7,6 +7,7 @@ #include =20 enum hk_type { + HK_TYPE_DOMAIN_BOOT, HK_TYPE_DOMAIN, HK_TYPE_MANAGED_IRQ, HK_TYPE_KERNEL_NOISE, diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c index 2a6fc6fc46fb..fb414e28706d 100644 --- a/kernel/sched/isolation.c +++ b/kernel/sched/isolation.c @@ -11,6 +11,7 @@ #include "sched.h" =20 enum hk_flags { + HK_FLAG_DOMAIN_BOOT =3D BIT(HK_TYPE_DOMAIN_BOOT), HK_FLAG_DOMAIN =3D BIT(HK_TYPE_DOMAIN), HK_FLAG_MANAGED_IRQ =3D BIT(HK_TYPE_MANAGED_IRQ), HK_FLAG_KERNEL_NOISE =3D BIT(HK_TYPE_KERNEL_NOISE), @@ -204,7 +205,7 @@ static int __init housekeeping_isolcpus_setup(char *str) =20 if (!strncmp(str, "domain,", 7)) { str +=3D 7; - flags |=3D HK_FLAG_DOMAIN; + flags |=3D HK_FLAG_DOMAIN | HK_FLAG_DOMAIN_BOOT; continue; } =20 @@ -234,7 +235,7 @@ static int __init housekeeping_isolcpus_setup(char *str) =20 /* Default behaviour for isolcpus without flags */ if (!flags) - flags |=3D HK_FLAG_DOMAIN; + flags |=3D HK_FLAG_DOMAIN | HK_FLAG_DOMAIN_BOOT; =20 return housekeeping_setup(str, flags); } --=20 2.51.0