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 A59E7309DB1; Mon, 13 Oct 2025 20:35:11 +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=1760387711; cv=none; b=q3UVAOPgO31Z3zqXBHhg1SCAd7EA5MPeYh2LjB84Jp295O4LxzHct+7Uq/94ZsU+bjOpbx2Wp1ehK22E4ViWu2wdmLa4KzspfmyjkNOZIVC8pR1YbDRLNliuN4/UGOoBDYkwddoK0KHd3D835tD02Wcpdo8KRyc/KAmqbnc2Kf0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760387711; c=relaxed/simple; bh=Rz519K4RzNFN9C7FTifkrc2s4js15D9og5elk9stWlE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=bPiaYS+sQ6wFvYo079OoUg+qplqHT9Lxp4vCTkey5Ut+XJ23Ao7sr2lb9H6dxJVwgU8yrHbN9D52xjWIi6j4hcAOIhW+sneRlf+1tWJIh2/B2UH1V1pD1XMTV8Pbb61lf3jmIt8ZiNdFPaek+UkZfMJXDhUmXx58YDjpqTNf32s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Jrf+Kg2/; 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="Jrf+Kg2/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7EE4FC4CEE7; Mon, 13 Oct 2025 20:35:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1760387711; bh=Rz519K4RzNFN9C7FTifkrc2s4js15D9og5elk9stWlE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Jrf+Kg2/DIvGCNfyCdPFH1ePE8ZtLXxlazjx5t7J+NDYTQdXxH1vJ2Z5Scm1VwP5a SFKQYCjcRmfVTw9Fxi/xNljzr9UonGFOBfXxE7QbiWus82J7VAHAAxWimL73PWy8sp KQUXmznsb7ngzcRXbeFT44rPWlDAU+23nOBfivg8Tdib55Ha8FFtUFqYb4WhKj7Wdb xqn7qGyWBJJwWe38QLQztBFP0hxmcWWMmsct/VYNHEJMPHbsrHisH8W6evGfhEbgWE qrozZxBzKyToJTV/iTb78znyKyHVL52oqRZ4h7NX0lZJzJVoUCRjEH6fXx7vkhe3gn JrvAZ+P+clgQQ== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , =?UTF-8?q?Michal=20Koutn=C3=BD?= , Andrew Morton , Bjorn Helgaas , Catalin Marinas , 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 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> Precedence: bulk X-Mailing-List: linux-pci@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 --- 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