From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 7492B31F9B5; Sat, 19 Sep 2026 00:35:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789778163; cv=none; b=oLAnKzmetpMq/Az/Eqxp+zo/cL3i6+ytoNec9NPuD/R9jBhNiWRsay7ONovlUJN7KQzXoQovCXoiQbjnaujV0svPnf8JbchZvKFF7/2ydddpdJE0k8pmt9q6I8Ij5UsQrPBGqu4iP/FOiFkSrunJXkzQK/EeVrtzPEe6Y47ZT1M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789778163; c=relaxed/simple; bh=ZsSFubY/1L7lg3TeE4B8iu4Ois91YjljlBfCXZY8n0M=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=IJ+/HAbRfiRUg0WxIbY2axfwRvJiSzncfgwnODLqben1sWvtKY409927n0ok1CL/ApKB5j5kYVyTiyROfJB8rJPLUACA5DD8Hc4TiLPIccUWUiiEazL2Fgey78nlMzmkvhRKSb/WGa29JH+9TGM9zhDHpRFtPL4IS2TkW6h5/wU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GHGX2Ulj; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="GHGX2Ulj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 63A701F00901; Sat, 19 Sep 2026 00:35:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789778123; bh=OlEdJvExr6Bd5YARe+Zza8eTz6C/rx+OO/RH2C3YfI8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=GHGX2Uljq6/9JQw5C0MgFwjxjbFrGeLknOICZL5vUbSfR1ssk4t/iInWukCyEig1O pfqX2Jpg1Q5W5J4kVhxOkw8PQ1n/RWqFFFq6Dr/y7BXZQyCKM6JuP6IOf5NR1xQeaQ t14pGeBf5sOU0Gc8IKg8LE/MurUiwkbx5+mas5gMIzvkSRzpAn0ZJvl/4BgbSHCYpj 070tP2XnksziJ/UbDW6r/C8eV2J/3KGkxaU+E1BkKIH+MxCnZRH5+R6wfZvNfck4UQ YoSjgwr4BJFYZHDA1e1hIr5ET5qb7rDNDZAHrlNbwWd09YhfuNaNe3ZwFJfZxxCdrO EbOaamuwcyQdQ== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id C2888CE1DD5; Fri, 18 Sep 2026 17:35:22 -0700 (PDT) From: "Paul E. McKenney" To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel-team@meta.com, rostedt@goodmis.org, Kunwu Chan , "Paul E . McKenney" Subject: [PATCH 19/19] srcutree: Skip torture to-big transition for atomic SRCU Date: Fri, 18 Sep 2026 17:35:21 -0700 Message-Id: <20260919003521.3134552-19-paulmck@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <13d6be93-8d9d-47a2-beb0-99c8a90938d4@paulmck-laptop> References: <13d6be93-8d9d-47a2-beb0-99c8a90938d4@paulmck-laptop> 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: Kunwu Chan Atomic SRCU does not use the srcu_node combining tree. Exclude it from the SRCU_SIZING_IS_TORTURE() transition in srcu_torture_stats_print(), and warn if such a transition is requested. Signed-off-by: Kunwu Chan Signed-off-by: Paul E. McKenney --- kernel/rcu/srcutree.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c index 6a05bd8a6f39..6e37d53b412e 100644 --- a/kernel/rcu/srcutree.c +++ b/kernel/rcu/srcutree.c @@ -2422,8 +2422,10 @@ void srcu_torture_stats_print(struct srcu_struct *ssp, char *tt, char *tf) } pr_cont(" T(%ld,%ld)\n", s0, s1); } - if (SRCU_SIZING_IS_TORTURE()) - srcu_transition_to_big(ssp); + if (SRCU_SIZING_IS_TORTURE()) { + if (!WARN_ON_ONCE(ssp->srcu_reader_flavor == SRCU_READ_FLAVOR_ATOMIC)) + srcu_transition_to_big(ssp); + } } EXPORT_SYMBOL_GPL(srcu_torture_stats_print); -- 2.40.1