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 79F90359F8F; Wed, 5 Nov 2025 21:07:20 +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=1762376840; cv=none; b=LTjd+Ab+pli75Act9HbyF3TcydtMKFJy5788BTrf50e26MEpGmOsilbKxII1dMSL9RTH8/iBHjVITdgCzDPTv3LWHuh7Dh61DcGMbCZiK/m2VznyFcQlaHkiPDuszsG6Os3QMLfc5FMqdetd9HGRuKqCxZOagxasDFepQVDvufo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762376840; c=relaxed/simple; bh=Rz519K4RzNFN9C7FTifkrc2s4js15D9og5elk9stWlE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hOjYBwXqSogA4KMDjY3UjeaSePNR5twPcbJxA9UBSPeZ7fDv6BjKB7NWmBcRQGlm5vU54yRe8/y47SMIfRmy82SqBkcIZcC1+bOsX2jOb/lfnXPWvj4DJxK5LpAcF8RUgUQgzeysoDPq7QDZ4bpAjr+j8jtjj5FEU7OHxJW7PRk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TIAbm/F3; 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="TIAbm/F3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 798D5C116D0; Wed, 5 Nov 2025 21:07:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762376840; bh=Rz519K4RzNFN9C7FTifkrc2s4js15D9og5elk9stWlE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TIAbm/F3lkoEFLNp3ZLWekoviyl6iWh5KqGoC3jN5pAXOi5L/sWwbTneX1Sd1f2Kl 7zL5xqMjp906phdgY3w8G4Loes9IQaHO6Jg1QGxIqMQsUXfkKAHhFb1mPBnHUnse7X h2mJe/zjqzeSRH2cgUsMRXuxYaohkVkO/lgKbv6DBati8qhfwhtKaoi7hBjPHR4dMv 8b9ApEnTcxqi22/RVPbXSqTskMNkQjcdP1Pb7XbijRLMlZfhJpdGLk1g9A53gP9snv vGCzTSX8nxacEQ8fa/P2hESWu04ejojFuxjWPxaXBvPpcyAYLwEkBrNtfCM7qw2bfC Dnzv5/9V3vOew== 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 25/31] 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> 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 --- 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