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 96E0738FAD; Fri, 14 Mar 2025 14:36:49 +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=1741963009; cv=none; b=JxBdPWhlMG1WUA5c8UStZOcAtLjDF/d2J3IuTbKVEc9fC1Zs+J+WdpbTgNw8kV0HyW14G8Ciqm2N3sW0GlBI1F4D65VOoIen7FPoVjWIEdxqGkOZieXCY4Y+uQW08pJMTNiXZAN6UNbKUQPognYlbjC8rBnYv5m3QX7gNIiV1QE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741963009; c=relaxed/simple; bh=IBlfiPFk2zgPUDOKEjy5xciZhCsVE7i9l2hkdj78FWs=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=OCJFNmRA8s5ItXLiNiFZ+B9iahVdTsvJFzi7trs6XaA/Jgo0j9XE/5NgiPPEmX/HZxjqYbG2GY8AbnCVl9XZ2tK3MdUHTdOcXCZX46Wbf+F/Wdd1QdMmDAuQz73nEM1cOrVX6fB+QLZaTNtklmpkT6oXg3pfIgO0zZZ7Bkw/u28= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=s1zhEQ0o; 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="s1zhEQ0o" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 01C8BC4CEE3; Fri, 14 Mar 2025 14:36:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1741963009; bh=IBlfiPFk2zgPUDOKEjy5xciZhCsVE7i9l2hkdj78FWs=; h=From:To:Cc:Subject:Date:From; b=s1zhEQ0o+dSdlsatsMigzfvQYvxxIkSMj6L+h4RbpvqEbJnVK6COKaLRTXp/RPnqL 9v+/ijjJJQEpqVpL4nnz+sX1mnPLRwfl8ulwrAHJsycOQi/7xBKtC6okVE7jP5WsyB 1ZatlpAlfsuXyztbcTMr11oJVRn7lkqVMNYi0Vddft8DkdmM0EXTskdX1IDTDnnvuF 55Uc90KCO2iQUEYUgZeloNrKPK7ywpFlf0D+S4PIZsJsSwWgr4cK1EO0+xWjwY9Wpy gF3ReTkI+van5V3lYWCwO3hBNoAuUlBmi5VUQQBFsXiwlNsamCj0IxNN7zV2nzO4jK OGFF5O46Syrqg== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Boqun Feng , Joel Fernandes , Neeraj Upadhyay , "Paul E . McKenney" , Uladzislau Rezki , Zqiang , rcu Subject: [PATCH 0/5 v2] rcu/exp updates Date: Fri, 14 Mar 2025 15:36:37 +0100 Message-ID: <20250314143642.72554-1-frederic@kernel.org> X-Mailer: git-send-email 2.48.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi, Changes in this version: * [1/5] Explain why it's fine if a task unblocks between sync_exp_reset_tree() and __sync_rcu_exp_select_node_cpus(), per Paul's suggestion. * [3/5] Add Paul's reviewed-by tag * [4/5] and [5/5] are new patches after discussion. Frederic Weisbecker (5): 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 rcu/exp: Warn on QS requested on dying CPU rcu/exp: Warn on CPU lagging for too long within hotplug IPI's blindspot kernel/rcu/tree.c | 8 +++-- kernel/rcu/tree_exp.h | 69 +++++++++++----------------------------- kernel/rcu/tree_plugin.h | 1 - 3 files changed, 25 insertions(+), 53 deletions(-) -- 2.48.1