From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 393B330E0DC; Thu, 1 Jan 2026 22:18:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767305883; cv=none; b=uLsAiYxIPclkGObcfHobDukLl5afEt99loTNLH5rMn2FDCQxGSXYaHw+9D6YChHpUHM2V29uXhgpOTKBry/BM3HsTZoI6BBte4QqkxiUZ8lDQEWZn8RxjOjb/xqfklfeatybTomTDz+bEojxEsG1DA5xkYWq1rBdxtyRX7e9HL8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767305883; c=relaxed/simple; bh=txAoH54KyHKbuey5FYwPXMe7a123Tyjq6wOFllqOg9U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=aC+GYGohFNUB70ydfkvgsUeFvRPX4g/uQvDn0pWdqeD/kcTKSc9A1R+SJdkhCEkYjYOtL3eFONJhDJBnAtNJFfjJBXpVh7HfOhX3ARms1pAzIGQodEg/kmAvW0FtE1Fp66GwmO/59OrHwHha3gW1N+xicBHvbKpCtC8akvYMffA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nGRmEtfZ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="nGRmEtfZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BCB81C116D0; Thu, 1 Jan 2026 22:17:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767305883; bh=txAoH54KyHKbuey5FYwPXMe7a123Tyjq6wOFllqOg9U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nGRmEtfZf/dlvXTRXeRug3jmfNXg5p3dx5FKXhG8VpPBiNBxtnzA4f4zq4cdvK7V0 Ajv2d1SdcQZ4WzUAu4ABDGC0IZLHAPLfc+WCdf/60Sme5hDBRAFCB6xCqi7jDHK8TF 4a2XPX9edzLhaEeEVfw90VYwjSLfjgww8JY6aPlYilZjglIbWHfdhP9hfdMKGiuMiN CVr1nXXYlRlsxaU9eYzmlqJotqeOlCna/rZcx+YxZrtTiAiWR6tsZLK7yNbTl2KOPM rXK4eWyFydu9GzHrar4isymMZ59ZNyAzDsj4JlDrWOfFfn/6xBWLEiO09OJ4w8+hTe V7cgvK/o6R8RA== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , =?UTF-8?q?Michal=20Koutn=C3=BD?= , Andrew Morton , Bjorn Helgaas , Catalin Marinas , Chen Ridong , Danilo Krummrich , "David S . 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> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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