From patchwork Fri Aug 16 04:55:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Neeraj Upadhyay X-Patchwork-Id: 13765440 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 A0AC98489; Fri, 16 Aug 2024 04:56:48 +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=1723784208; cv=none; b=iar8MOIH6ZVQP9vEFvcNXtrnqzsZegZ0xiYy4A5KHg4ioPNj+yVLlCLPL87W+3ETmnEuPpTwyJfzmAFIbVFlPLEOyFmHNunJea8D2AktE+Y6/gCkbkln+ePg3d3ODHXNXW0oFGjb6dGFlEJgy/zF60IVVRGrdFRdnO/WEOOlf1A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723784208; c=relaxed/simple; bh=ZoyRo/tyseF652lJUasxSfc5hrvMgjk/ZV2qAotF3O4=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=WFTrPZCtnM+8u4UXVUA+Afyxc+y+LEJhcq0hA5fsneChsfEhCqU9C7PeVEioLVREULsNxnskG6iGpcpaYUwQJ5qFL62MkdBvl3Tqe36RL+GOV3d7JDS4Q3Ool9ngUE4bTlwePK4oLAysjhXTgbDkH1iN6xoNFGEQko63i2z4V0s= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=n0Twf9N6; 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="n0Twf9N6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CC8B6C32782; Fri, 16 Aug 2024 04:56:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1723784208; bh=ZoyRo/tyseF652lJUasxSfc5hrvMgjk/ZV2qAotF3O4=; h=From:To:Cc:Subject:Date:From; b=n0Twf9N6SzQifxo75tc4zBmYyZ7lw0zl0HPmf0ypS8pdHoBidwMQs0jE9VcWwym/u ocxVPMZ47A1EKFEHeHt3b19Yw0ZqpPwWP0goDjyeqOgMnt1k/IVKRZdcT09zP8WDXP WNiW2yGR2yC9QNbiUNhFHKadnU2FAD9V9Z9ucoUB0wxt+dt9gGe/s0faYralxHGSCm b8EEQxZfGBbzS1sGiPIso27T8jbv5TSPaeMRNUEEz4MvucNU4OvxLxOv+Itt9BbRxZ tYN7pvR/54M5hWR1pd8ofiw1wslcGCkNMX6eDrhrUXKj23rltereRhAS2DXxDa6Rkn ABcnPFMubzwDA== From: neeraj.upadhyay@kernel.org To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel-team@meta.com, rostedt@goodmis.org, paulmck@kernel.org, neeraj.upadhyay@kernel.org, neeraj.upadhyay@amd.com, boqun.feng@gmail.com, joel@joelfernandes.org, urezki@gmail.com, frederic@kernel.org Subject: [PATCH rcu 00/11] Nocb updates for v6.12 Date: Fri, 16 Aug 2024 10:25:57 +0530 Message-Id: <20240816045608.30564-1-neeraj.upadhyay@kernel.org> X-Mailer: git-send-email 2.40.1 Precedence: bulk X-Mailing-List: rcu@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Neeraj Upadhyay This series contains various updates and simplifications to RCU nocb code to handle (de-)offloading of callbacks only for offline CPUs, courtesy of Frederic Weisbecker. Git tree: https://git.kernel.org/pub/scm/linux/kernel/git/neeraj.upadhyay/linux-rcu.git/log/?h=nocb.29.07.24a - Neeraj Frederic Weisbecker (11): rcu/nocb: Introduce RCU_NOCB_LOCKDEP_WARN() rcu/nocb: Move nocb field at the end of state struct rcu/nocb: Assert no callbacks while nocb kthread allocation fails rcu/nocb: Introduce nocb mutex rcu/nocb: (De-)offload callbacks on offline CPUs only rcu/nocb: Remove halfway (de-)offloading handling from bypass rcu/nocb: Remove halfway (de-)offloading handling from rcu_core()'s QS reporting rcu/nocb: Remove halfway (de-)offloading handling from rcu_core rcu/nocb: Remove SEGCBLIST_RCU_CORE rcu/nocb: Remove SEGCBLIST_KTHREAD_CB rcu/nocb: Simplify (de-)offloading state machine include/linux/rcu_segcblist.h | 6 +- include/linux/rcupdate.h | 7 + kernel/rcu/rcu_segcblist.c | 11 -- kernel/rcu/rcu_segcblist.h | 11 +- kernel/rcu/tree.c | 45 +----- kernel/rcu/tree.h | 6 +- kernel/rcu/tree_nocb.h | 268 +++++++++++++--------------------- kernel/rcu/tree_plugin.h | 5 +- 8 files changed, 123 insertions(+), 236 deletions(-)