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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 05/31] 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-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 8DE65140007 X-Stat-Signature: q7siu4hmq8quobogf3u6oy16w3mnea5c X-Rspam-User: X-HE-Tag: 1762376682-513053 X-HE-Meta: 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 W2FhRFMO 76NV49Zhs6L/REcgoGbHlXb31V1GBo0OrmN5xmC9lYGk/IAb1yoUMZ04lrQR0RTnHaxEbaRF4xd3AER/BxFEQuPZfUNYb6eNDuIClAWfJqB01+3KeIpCOlyv2Yz3iTOSpl6vf8XKdbgS7AS5nknI+UE1KUFTC6jLLCpsMmx1dYAFsiKARkZXnWU5JfpoRzVeZd4tXNTebzevIqf2cJb/52KHohFvDq5MAG2WLlSSr2DAKcsjHjtNApSsTdXbBddYvnuC7mONAemFaznRs5+O8Z9PLZWgG5BKq7wys 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..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