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 5A57919EED3; Wed, 25 Feb 2026 21:47:25 +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=1772056045; cv=none; b=W5hQ6H0gyARFG657rvh39CAIZzvoYFn3WDVaaevHx5jvVcK4tmNUhqFdAXXhETZ+e+2j4cm8E5M1xkO+k21iDfuXqUonQk1wuCy2+noRj2cpRPc/b9Cngy1kYdREdcbefohYsvKKt0Ua7tMAOhcMKa0//4ZsASEA6p6PCNhZS9k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772056045; c=relaxed/simple; bh=eB3dlDanSUqHdVRoj+kS2XXrd11UXSD/TKi4J5qRdIs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ttPUdzt1nL7O1NCJPaGRxSpaerN5TRibmuzLbHnjVJ51nZqIezdtc7LyVjq4bbDs/qBb9Rf3sBrkEzYiHMGf69WPVZq1zZqukOzlq3tBNvrwtenO4h+cHXsEtZiF3VRoBokReI1D3dZEUEoqqj7G72p7krKXzH50+gytcvYjCXc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rvQul3ao; 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="rvQul3ao" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 36D3CC116D0; Wed, 25 Feb 2026 21:47:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772056045; bh=eB3dlDanSUqHdVRoj+kS2XXrd11UXSD/TKi4J5qRdIs=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=rvQul3aoyYiV3rHDdCLvjyBHsATkmo+C0Z+0XmbWvUypeh9ek6l0mh6924e94wNbE QQxu0G42OZ8Urmpr7jQ4miF3xBdlCD7qBW8E34mXSBitldklFf9XrSHXzPFswtNKm0 Rq4WBdViQisD+GN3z+GTaY3isBPcK8d6nnPEer8KZdRTFiT1JK8r1e2qU9gWr0YaCn NwB/i/gKka83DkgtmFTwrrlOGB2kVnLVnYmspWiPJ+KNqfvfCfvLC0ch4wYJO/ti6m oyaZ6s+tDM1vqO1tgZoeUuN4bMznDn3+DfNGKgZf6/ePi9665oikDftIgRG+KIVe46 8N4n7T530fbrg== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id C4702CE0A7F; Wed, 25 Feb 2026 13:47:24 -0800 (PST) Date: Wed, 25 Feb 2026 13:47:24 -0800 From: "Paul E. McKenney" To: Joel Fernandes Cc: Frederic Weisbecker , Neeraj Upadhyay , Josh Triplett , Boqun Feng , Uladzislau Rezki , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Zqiang , rcu@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH RFC v1 4/4] rcutorture: Add NOCB02 config for nocb poll mode testing Message-ID: <89367e04-7647-4165-be41-385b61aa131b@paulmck-laptop> Reply-To: paulmck@kernel.org References: <20260224230435.3390963-1-joelagnelf@nvidia.com> <20260224230435.3390963-5-joelagnelf@nvidia.com> Precedence: bulk X-Mailing-List: rcu@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260224230435.3390963-5-joelagnelf@nvidia.com> On Tue, Feb 24, 2026 at 06:04:35PM -0500, Joel Fernandes wrote: > Add new rcutorture config NOCB02 that enables rcu_nocb_poll boot > parameter combined with CONFIG_RCU_NOCB_CPU to exercise the polling > mode code paths in the NOCB implementation. > > This config exercises poll-mode paths not covered by other configs, > where callback invocation uses active polling instead of kthread > wakeups. > > This config is not added to CFLIST to avoid increasing the default > test duration; it can be run explicitly when poll-mode testing > is needed. > > Signed-off-by: Joel Fernandes For 3/4 and 4/4: Reviewed-by: Paul E. McKenney Tested-by: Paul E. McKenney > --- > .../selftests/rcutorture/configs/rcu/NOCB02 | 20 +++++++++++++++++++ > .../rcutorture/configs/rcu/NOCB02.boot | 3 +++ > 2 files changed, 23 insertions(+) > create mode 100644 tools/testing/selftests/rcutorture/configs/rcu/NOCB02 > create mode 100644 tools/testing/selftests/rcutorture/configs/rcu/NOCB02.boot > > diff --git a/tools/testing/selftests/rcutorture/configs/rcu/NOCB02 b/tools/testing/selftests/rcutorture/configs/rcu/NOCB02 > new file mode 100644 > index 000000000000..4c2b8cd6d8fd > --- /dev/null > +++ b/tools/testing/selftests/rcutorture/configs/rcu/NOCB02 > @@ -0,0 +1,20 @@ > +CONFIG_SMP=y > +CONFIG_NR_CPUS=8 > +CONFIG_PREEMPT_NONE=n > +CONFIG_PREEMPT_VOLUNTARY=n > +CONFIG_PREEMPT=y > +#CHECK#CONFIG_PREEMPT_RCU=y > +CONFIG_HZ_PERIODIC=n > +CONFIG_NO_HZ_IDLE=y > +CONFIG_NO_HZ_FULL=n > +CONFIG_RCU_TRACE=y > +CONFIG_HOTPLUG_CPU=y > +CONFIG_RCU_FANOUT=3 > +CONFIG_RCU_FANOUT_LEAF=2 > +CONFIG_RCU_NOCB_CPU=y > +CONFIG_DEBUG_LOCK_ALLOC=n > +CONFIG_PROVE_LOCKING=n > +CONFIG_RCU_BOOST=n > +CONFIG_DEBUG_OBJECTS_RCU_HEAD=n > +CONFIG_RCU_EXPERT=y > +CONFIG_RCU_EQS_DEBUG=y > diff --git a/tools/testing/selftests/rcutorture/configs/rcu/NOCB02.boot b/tools/testing/selftests/rcutorture/configs/rcu/NOCB02.boot > new file mode 100644 > index 000000000000..c212ae299b0b > --- /dev/null > +++ b/tools/testing/selftests/rcutorture/configs/rcu/NOCB02.boot > @@ -0,0 +1,3 @@ > +rcupdate.rcu_self_test=1 > +rcu_nocbs=all > +rcu_nocb_poll > -- > 2.34.1 >