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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> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: A08E240002 X-Rspamd-Server: rspam04 X-Stat-Signature: 4z4c6kzx7bp9qj74r8j3e4grj8wiouoe X-HE-Tag: 1767305694-59275 X-HE-Meta: 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 Vhe+EQ4m 6aj4oYTbf2CKf0aFS6WOX3POad9ItJMPQrJPJHvixgGOiy825Qs4nYbjGoQqFSHppSW5QkkcgHhWBEsFYQdUBk5V8QBuBiShhrZDAI4UXCOFn8djHEvUTuFDxW+Jrk/4wCymknWaki496AZntqfrZeaJvBXvLPKhaopUTfcE+MZ9FnqO5aOUCquY/y2jU/gVcjlSUrrvgIjmxxZFntN8kHWPeRrXLNiLVOGQZelDGbNp2Pw51MxCTvX445JbRZMrT7yaVodDBnspLb3lh5vXZxxH06+BQCIigIFaJ X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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