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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 25/31] sched: Switch the fallback task allowed cpumask to HK_TYPE_DOMAIN Date: Wed, 5 Nov 2025 22:03:41 +0100 Message-ID: <20251105210348.35256-26-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-Queue-Id: D85771C0011 X-Stat-Signature: 16y3zh55yo6z679u597ey6tmt1nhkyb4 X-Rspamd-Server: rspam02 X-Rspam-User: X-HE-Tag: 1762376840-867820 X-HE-Meta: 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 KKQUwa+p xv4j+U7pNF2Fzo4ST4o3xQEL+hRhBPfdYPpibLr3CEHZLwSxRmdORMk974+I5Krcu24ooAe04a1cidcOHCLmzxm1ADsbWSDiFFX/MSoLYIarp2hpFbFgvzh4MDzIokNv7VkthG2JAsVCT2T4lcI6i/kkfXc/zzhzOYpxjWGKYrWSxthMUqQz3BewbFwhnymjsJ/j2TOREB9yA6dBES3st/v5yP+7IO4Gi0VmpMjSyreoG9IX6u0ju3Umd/9ZAZoAAul7wHMVGiJYeh649Whb9uNtBnLaoVXkzA1aemTCpi4idSK2uxgNoHlUSfOnE/7F55ZbU 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 --- 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 -- 2.51.0