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 3109041D13D; Wed, 7 Oct 2026 20:59:28 +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=1791406769; cv=none; b=IXCr6vErzRt4lwmQqs8TQtmOpU/SKTL1ElFSScDGR6ZG9FHOmVjPX6k5s3YnobfiqDXeLBhgYW7OxdgA57K809CrQSFXo+rTsaLlx6WRnmBnrYeNAgleM5XqNvQK9j/DK+QSbywqmZQsIbEvHExRZggUq8+kSYOmGshE+B/0k2I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791406769; c=relaxed/simple; bh=Nr6G1HwJjyO3gVdy3VBDkpKSKu1UBqYDHlmUKMnfp+4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=CG8mpzctr9CwbK9IeszgimTdAf9fNqLx0NIWSzLX35/VXAPQx2FQpXb0ZTAfijpfvOdpii/kwDLTRtEXkoVSClNSe/t6ljAjXTWJrmudkWOP7joX/dwXJjOfNHRBmJWiZneoMXEHklB+/V1LWmGnY1Wh3Zs4wL3PWfnAaLVrbS0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PyBk7K6h; 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="PyBk7K6h" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E98581F008BE; Wed, 7 Oct 2026 20:59:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1791406766; bh=MgGadDGs+NQUReQILm41h6P8d3IAjttKGXALi1RokW0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=PyBk7K6hhY9QFRK0zLvwIrXQ2DLldpMPQSNNQGYEnUbLOQl0ajyNMwN1w5zEiqf7N Ki2h+guOnAcS4O7+e1f6aZ60+GOZxWYm0he/e9qe8slk9eWZT03kCyjqAAVMVDvZWP 8oMTbMJzh6nGeEmRqsi37c3xBO58zEhNogoK1jxtx6wW+veGdHqaLrk2ykfU7Fj65N F4HTMs0GLnDXs02JN4eU3RHbXJPZI/Y/AmrioXFzu4WtpFaE/v2OiVN+MFp5pWEINe 649CsFUt8Quer+oeomM50YdFhlpfN1Tfh6Lpr2z/+DWxbrLj9FxFNT+dOssDgiOkkR ZwJgol2s+d4IQ== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 3D124CE3996; Wed, 7 Oct 2026 13:59:25 -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 v2 18/21] srcutree: Skip torture to-big transition for atomic SRCU Date: Wed, 7 Oct 2026 13:59:21 -0700 Message-Id: <20261007205924.1983367-18-paulmck@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <546c81a7-f677-4d8e-a304-746b227058b0@paulmck-laptop> References: <546c81a7-f677-4d8e-a304-746b227058b0@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 6a05bd8a6f390..6e37d53b412e1 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