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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 25/33] sched: Switch the fallback task allowed cpumask to HK_TYPE_DOMAIN Date: Mon, 13 Oct 2025 22:31:38 +0200 Message-ID: <20251013203146.10162-26-frederic@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251013203146.10162-1-frederic@kernel.org> References: <20251013203146.10162-1-frederic@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 94B8B100011 X-Rspamd-Server: rspam11 X-Rspam-User: X-Stat-Signature: d8hhya56b3cbfsyrawcijki4cu6eprbe X-HE-Tag: 1760387712-914882 X-HE-Meta: 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 +kbsE46C iOzo9e0nqygtFhhYpN/HclM3iq3iyLXOmwrbfB2dIG3hT0aAgPyfeyl+GR5cxuH0MljowZHnS65GXHD6Zoo4zoFq+6A47kRrCWAL0dCrGr9/qcMfiGpruuo015uKNgGVdNHK5VpfWos97sv5CleVROdmQ5rWDDGcUAnpuLl4vGfV1nQTBZb4PJsTMNp6lhiyJWd0TjigxNTPZhHIPPKB6T3Nav+1GummWphaAzmn0X6Bc02zC4GBRe2dfGlD3HGCNU4K0y7pP+JxgnsK9xvsJPJdimVzMpc+BB+ZD4B5meOYeXNiQSs397AooJd/9UEiqf/CS 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