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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: Thu, 1 Jan 2026 23:13:53 +0100 Message-ID: <20260101221359.22298-29-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-Server: rspam11 X-Rspamd-Queue-Id: 4CF11140004 X-Stat-Signature: 1b4zes1dbmzgng58uhpbdpfmk6ge7bq4 X-HE-Tag: 1767305884-241120 X-HE-Meta: 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 plZObu4p EkuL9SHIAr2xQFS2FDdNWq/iK0f1dl3D1jVZ+Ak90CZfrL8hhnKSAPPTZ+npMUteILnpowBI4Wn77NjflCXaljDgat9cDxOVme/D6nvbHAPY/rAuByV91n0EjTN+f7SZ8X1jmldZpi5VOgCZj5i2zNbRS0ZKI0sHsEP3PzHBtGdr6tpR4sxYH19GQ/sc1qKcf1s9uNfmuM7fnAsRooHvUm798qRkO0DjETTjJtb2tgF5DkgnCuTfrQkbvnd56gnf2bu1ydcH0zhFExp+R3qS4Z+lWTVrcVQUbvxQY/kvBl0j6cB3MU0E2bhaROPxK/vmm96sbnnKuzHKRR9x/sOLNQ1C14g== 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