From patchwork Thu Feb 13 23:25:56 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frederic Weisbecker X-Patchwork-Id: 13974155 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 F3E1F2753F5; Thu, 13 Feb 2025 23:26:07 +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=1739489168; cv=none; b=M+F/Z4IOBymLKER9CaRkHptcD4Vl9pC9Nh8G+vZZ9kwKpsbCoP6+ancKbshLNYC2C2Gr9fF7ykUZg0Xh4+opVCa2OOucOMYvAY+f4T3WMdkeG3pooVDCVAiAsoDoUogsC0eE0KfSQVX/h9rOuJvB/qGz8+/GOjgJWDm0fY2pEW8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739489168; c=relaxed/simple; bh=m4SkwGBwuYNWHHghN05gTZyhGsaid8y/tuhX8kpSUHA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=CeD9Q6vsHlAcUY8PDAMXVunNF+jBw4OEd8BPFTDOWy/jZJzX0u7IUhoNYTrBdD0Rbsh4f913DV3VmFnoNANKYvfLoK/ZWuQiPy2QWqge6dsOusqmvL2YtvEsiaOmRREsoIw9AnH3NRel2oFh7mCbXi3J7/EMZVnidcvihFbe/oQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Le6W/jI2; 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="Le6W/jI2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 86329C4CED1; Thu, 13 Feb 2025 23:26:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1739489167; bh=m4SkwGBwuYNWHHghN05gTZyhGsaid8y/tuhX8kpSUHA=; h=From:To:Cc:Subject:Date:From; b=Le6W/jI2Wia46u7sJKLUgWO5LLTve/tBrHQ2wDMj10/HFNW6b24quZ8F2KYa/io6G Qll39gEiN+mz+OA40VCZ6ITvjC6RXCoHJWwVo1GKjLzNxyAB94R7CgEhx9jLsFEo2r hPLXcxMfqAEc3xRcmRNhNAcNkBL17WXFiagUs31bM7XLb6uXMuqXvkD8aHwITTa2Ae Bzx9A2pLm6VFWkoB+RYJpJa9T62IONWZlRnjz2ZyYQfw+MpHq7lbIlqh/GRzXM0dCp qmOdeWflX1cA/ebR+6fhSyV5aCex4eVPvQRBII0cZBhNzKzRWDDYfWhSivdSAyVC+0 ryDlFiu46/iHA== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Boqun Feng , Joel Fernandes , Neeraj Upadhyay , "Paul E . McKenney" , Uladzislau Rezki , Zqiang , rcu Subject: [PATCH 0/3] rcu/exp updates Date: Fri, 14 Feb 2025 00:25:56 +0100 Message-ID: <20250213232559.34163-1-frederic@kernel.org> X-Mailer: git-send-email 2.46.0 Precedence: bulk X-Mailing-List: rcu@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Here are a few updates for expedited RCU. Some were inspired by debates with Paul while he was investigating the issue that got eventually fixed by "rcu: Fix get_state_synchronize_rcu_full() GP-start detection". Frederic Weisbecker (3): rcu/exp: Protect against early QS report rcu/exp: Remove confusing needless full barrier on task unblock rcu/exp: Remove needless CPU up quiescent state report kernel/rcu/tree.c | 2 -- kernel/rcu/tree_exp.h | 59 ++++++---------------------------------- kernel/rcu/tree_plugin.h | 1 - 3 files changed, 9 insertions(+), 53 deletions(-)