From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f181.google.com (mail-pf1-f181.google.com [209.85.210.181]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 20B7778283 for ; Thu, 11 Jul 2024 08:33:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.181 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720686782; cv=none; b=E+6XKxjBSM3jqUZw0WTZG/HUDxo21RHK2t17rYsMKeAgNFkPZPY/cnXU1yqA3v/N4fBzKbNF02e8EgHQb4P5bIHFYq+zxCkqyq+o3vjn4XDoOipgu7wMDJ0Wo0Ec7yt1snXLTm/0GLjKadN7ro1EaGrZYGLRyFvKJqSVsiNsun8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720686782; c=relaxed/simple; bh=iDmsWbPPeNy9bLfIfXJjsf2+bhGoueLePNLNhx4xg/Q=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=avm4mQ8YZMIOoRooovNjBDNMm8msV2hLXR9bcXcrK5I2Hra8deGDWpiDmM51aG3p3UCdySzCkZNuvwXCajSY0LNKZo5ZSxB4tzYSDLNjU/i2horL9D2qx/+OJxw3E34Rw6aVdn9Xdim093aDeG3uiggbCXro08kBlQ7cZguM8xU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=UpvPNsgU; arc=none smtp.client-ip=209.85.210.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="UpvPNsgU" Received: by mail-pf1-f181.google.com with SMTP id d2e1a72fcca58-70b2a0542c2so607372b3a.3 for ; Thu, 11 Jul 2024 01:33:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1720686780; x=1721291580; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=LDEBjijCQpJCT7g0M/qxAjfKn4jcHCjhPGH3P7mUprU=; b=UpvPNsgUBwEQ8zNaA6GUIuV9ooyThJQeLbRtXNUDv/tjyAm4WZabA/P0LdjvheeVKD rHg9jaM/oqJw2+1PY6LAmqUrqp47Ev9fwvAL0MY6WpSoGv3NrmxiEVBvymAQrsvJviw4 WjnRFWwu1+hHm5w5jhgQck5UNE80VSkMJssd+I7i2mVrprD/S97kg49LzkF3txeQbzWq dKeVUSJIxHT64/6DdYwZBPql7HS3zbpiSAX1o323x4ye5VJb2UA0CNJkhUXAUqg25oOp 3uBomc4JjY1Uv4OJhn48GRVZ2TJvwId14gQEmlbhz8LBXcThmoeudP0vFuz5AkVSQBzl 937g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720686780; x=1721291580; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=LDEBjijCQpJCT7g0M/qxAjfKn4jcHCjhPGH3P7mUprU=; b=epTVgOotrxXl0wZAaFHIWwhZRm91mNhw8Ls4iPXJ+91t3CPZBAycdft4iiMMTGIwIH gQw9KE3VYRzwH1HuavfDvBQwtBTvvJTu1G42cD6TUiymG9qyt7qU9rQ5RG6Jc9xDxkPN uANuIkFi9iQi6Uuk3TL+poEDdvifB6ZXKbwhy2UhbKI3Ij9bole2q5pAeRyMkU+3RXvK SQkSSMX1U3Ed/ZGHxWksjUjc7pT+UHWGjDfSpp1sceOyd57NH6zbfY8qrk0InkiJibPt tnW2Xd0SR2axYuonS0M/LrBh8x7FTVb6dtSke1zVs5ARASDVZEwTUYL0PKYCjVIHsFD2 fktQ== X-Gm-Message-State: AOJu0YyJCPe6KfMyHrkS8jdt/JifhK5dyEuLzbl/BhnAXM9+y/eNqPP/ AsZVFE+XJ8iLpEbC8JUYdFve7UoYP7flalu70n43iXxAbKYzZ2mzOAtKcA== X-Google-Smtp-Source: AGHT+IHCgu/g9ZSJqiOCxI4GYMDEFJPRKB3Wm04lhAXG2TESWIWD3pRBGlIy43dY/mgOGvtT+UTAMw== X-Received: by 2002:a05:6a00:1387:b0:705:a600:31da with SMTP id d2e1a72fcca58-70b435f628bmr9463270b3a.23.1720686779886; Thu, 11 Jul 2024 01:32:59 -0700 (PDT) Received: from localhost ([47.254.32.37]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-70b53a8e7d4sm2734208b3a.203.2024.07.11.01.32.59 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 11 Jul 2024 01:32:59 -0700 (PDT) From: Lai Jiangshan To: linux-kernel@vger.kernel.org Cc: Lai Jiangshan , Tejun Heo Subject: [PATCH 0/7] Add wq_online_cpumask and remove cpus_read_lock() from apply_wqattrs_lock() Date: Thu, 11 Jul 2024 16:35:40 +0800 Message-Id: <20240711083547.3981-1-jiangshanlai@gmail.com> X-Mailer: git-send-email 2.19.1.6.gb485710b Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Lai Jiangshan The new wq_online_mask mirrors the cpu_online_mask except during hotplugging; specifically, it differs between the hotplugging stages of workqueue_offline_cpu() and workqueue_online_cpu(), during which the transitioning CPU is not represented in the mask. With wq_online_cpumask, cpus_read_lock() is unneeded for wqattrs changes. Lai Jiangshan (7): workqueue: Add wq_online_cpumask workqueue: Simplify wq_calc_pod_cpumask() with wq_online_cpumask workqueue: Remove cpus_read_lock() from apply_wqattrs_lock() workqueue: Remove the unneeded cpumask empty check in wq_calc_pod_cpumask() workqueue: Remove the argument @cpu_going_down from wq_calc_pod_cpumask() workqueue: Remove the arguments @hotplug_cpu and @online from wq_update_pod() workqueue: Rename wq_update_pod() to unbound_wq_update_pwq() Cc: Tejun Heo kernel/workqueue.c | 76 +++++++++++++++++++--------------------------- 1 file changed, 32 insertions(+), 44 deletions(-) -- 2.19.1.6.gb485710b