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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 28/33] sched: Switch the fallback task allowed cpumask to HK_TYPE_DOMAIN Date: Sun, 25 Jan 2026 23:45:35 +0100 Message-ID: <20260125224541.50226-29-frederic@kernel.org> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20260125224541.50226-1-frederic@kernel.org> References: <20260125224541.50226-1-frederic@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 18473140005 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: d94y38os7f73zbz3rxe9456ggyskhodk X-HE-Tag: 1769381380-494438 X-HE-Meta: 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 sxULoTXt Ofolz7KD2co2FVcQMSmA01lWjAbTF1n0GQpDI7tb/soAyh2k0AQXaIEo8uW2AC/wXB8mPJOpYGDjT2IqqamX1I4qO3tZcBV4kUvOjl6N74SKhLu2CVi1jGfIBdEno3mWRHrf0z3GpU1t/GQlY4YEJ4yvNSNd7A5SJl/d4cW2d2vUupJKfJP3eJ7NbHR9xda0kYdjkhn/L1vf/tN+9QO88UBQ3raFcCc0KkXoRoNtprGvFWS0Cq/YwL2v8Bvc1Vpf2FJ6MWIKxO6TbFyb45XT5h9kk+0ddI6JW5wypIdlR2S94dkp0LIM8Od7no70m9vVHUiZGxXADjs7Yz/TAh8ZCuzGGbw== 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: Tasks that have all their allowed CPUs offline don't want their affinity to fallback on either nohz_full CPUs or on domain isolated CPUs. And since nohz_full implies domain isolation, checking the latter is enough to verify both. Therefore exclude domain isolation from fallback task affinity. Signed-off-by: Frederic Weisbecker Acked-by: Waiman Long --- include/linux/mmu_context.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/mmu_context.h b/include/linux/mmu_context.h index ac01dc4eb2ce..ed3dd0f3fe19 100644 --- a/include/linux/mmu_context.h +++ b/include/linux/mmu_context.h @@ -24,7 +24,7 @@ static inline void leave_mm(void) { } #ifndef task_cpu_possible_mask # define task_cpu_possible_mask(p) cpu_possible_mask # define task_cpu_possible(cpu, p) true -# define task_cpu_fallback_mask(p) housekeeping_cpumask(HK_TYPE_TICK) +# define task_cpu_fallback_mask(p) housekeeping_cpumask(HK_TYPE_DOMAIN) #else # define task_cpu_possible(cpu, p) cpumask_test_cpu((cpu), task_cpu_possible_mask(p)) #endif -- 2.51.1