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 67E872F12C5; Fri, 31 Jul 2026 01:07:23 +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=1785460045; cv=none; b=kb29n93RTBZlJ8QZuxP6LHR9+jMKKKHj/xVJsh+TqDBgjdmWe0pfCThscruqQdbEsttQ+NcYPJ5Gg9aE/SqFURj+mAB3A9/iZWzJ4K0QfZk5dkVtEBZNVo40ymEBEnsHa2TluWjt+w/MCoxxBNL4G4x7sdkfKXHnQkWCLrtHZP4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785460045; c=relaxed/simple; bh=xuRR3yoZpoglrYbBFUEfBGgutY7lZOA51A8NkDzJSdI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ey30QMc0r+X5qKQBjpH06UDVgQ9nbxM+3kKlLLputAAqye37FU1YRXjfeMYc5ncApWlCTQopkaAmF1SlyjCqvm7BlLDzp+HDEcXhGKh9vICqSHj0/+j1Kek9cAzT5FECmzGa62jicirjruRVwE2TllpCQqKmd9+QFMBFhfSLf3g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=H4HkN3Fc; 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="H4HkN3Fc" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 197A21F00ADF; Fri, 31 Jul 2026 01:07:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785460041; bh=NgywxFLfegxFcuoGNSLhi1JpBpo5ReUp4CkoUNjAAGY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=H4HkN3FcGpHrYk2A4IJdfZOsjdKWf5ZyIk2ik7OTY1RhwrHokcArjWPhQHtUBSJxk zrozvudPqH7n+hFjlcVAAaJXL0WIvWi8TpPw+iExrFfYlj1AaP1anEaORgp9Ptv+F1 HUBpw4pRgZUfH7RokTufqS5UoNerU3CNPHD/W81JIgpU2Fg8l6PboTeLlzu7ZkSfPX OlN5NgW4Gwok2eYs6aEYPjwR57bCHT6VFymcWsbSIWTkugcQg0iLZCGcBgYCrv0/51 GgKhfN3ag6vZZphTXx0miqVNMwuG9nrbzh25iVOB2bpQx/S0HlLAj/mDA94gx1bGJg V3Inc0NKD2rag== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 9E1EFCE17C1; Thu, 30 Jul 2026 18:07:20 -0700 (PDT) From: "Paul E. McKenney" To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel-team@meta.com, rostedt@goodmis.org, "Paul E. McKenney" Subject: [PATCH v2 12/13] rcutorture: Announce declining to forward-progress test Date: Thu, 30 Jul 2026 18:07:18 -0700 Message-Id: <20260731010719.3531912-12-paulmck@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Currently, rcu_torture_fwd_prog_cr() announces function entry, but silently exits if rcu_fwd_emergency_stop is set or if there is no ->call() function available. This could cause confusion, leading people to believe that rcu_torture_fwd_prog_cr() is on the job when it is not. This commit therefore also announces the early exits from this function. Signed-off-by: Paul E. McKenney --- kernel/rcu/rcutorture.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 9180016d87c0ce..46d97055c2fcde 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -3623,13 +3623,17 @@ static void rcu_torture_fwd_prog_cr(struct rcu_fwd *rfp) unsigned long stopat; unsigned long stoppedat; - pr_alert("%s: Starting forward-progress test %d\n", __func__, rfp->rcu_fwd_id); - if (READ_ONCE(rcu_fwd_emergency_stop)) + if (READ_ONCE(rcu_fwd_emergency_stop)) { + pr_alert("%s: Emergency stop, so no forward-progress test %d\n", __func__, rfp->rcu_fwd_id); return; /* Get out of the way quickly, no GP wait! */ - if (!cur_ops->call) + } + if (!cur_ops->call) { + pr_alert("%s: No ->call(), so no forward-progress test %d\n", __func__, rfp->rcu_fwd_id); return; /* Can't do call_rcu() fwd prog without ->call. */ + } /* Loop continuously posting RCU callbacks. */ + pr_alert("%s: Starting forward-progress test %d\n", __func__, rfp->rcu_fwd_id); atomic_inc(&rcu_fwd_cb_nodelay); cur_ops->sync(); /* Later readers see above write. */ WRITE_ONCE(rfp->rcu_fwd_startat, jiffies); -- 2.40.1