From nobody Mon Feb 9 18:01:40 2026 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 E9FEA2153CE; Mon, 31 Mar 2025 21:03:15 +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=1743454996; cv=none; b=gVuL3AHXEFuo+ICL0VoqDZOYCD7LgV/LOwqmmeXWxmya0AU5i0YL8wACxknDCUjMojLKKkz+liZlAA7mYKQYTo7he+WbCdOKzLBibNx9VUj6a8DUtMU364k/j/cmn1egCeyffy9fykulyjR1WAiWVP5FBxeTUOIARmSuTS3GiZE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743454996; c=relaxed/simple; bh=9sDMN4XZIcJRgoHQjxyZQce37ueUrgjbAHGywNbSEVo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=H/MOD8SrMLDSgJX3A2XXCLdQ5C017xDTF4nNi1FDs9EGZiGTTtzI28ZLmb71+bRvYrdXmbeXyoBjroB0xfM+flcGG3Wflf9Irgb3zS7j3Vn4ZvKWH6MpWXkuf67dar0dtJ1qHkCvtr0qiixwOzwxb8ixzsLAp1oCdxHXBEu0XUs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HAX4KNmP; 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="HAX4KNmP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8D7D9C4CEED; Mon, 31 Mar 2025 21:03:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1743454995; bh=9sDMN4XZIcJRgoHQjxyZQce37ueUrgjbAHGywNbSEVo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HAX4KNmPJGdPwHk2VJZZl5ykOgI4J4w8XqZu27hWQhKh0XNesjbap3l/lVej8PS96 3i6/ieNyjBTmFKhGJ/vxvcvvRuSZRN7z9nwYZHyKptC7CbzjKgob5y/R909CmNYAQq juDAEp8DZNg6i9U2Qs1UzIw8txwOfjlIdu2ku+u7N/sqnBsp8fV3g+pPHH4piNikJB CeUb4TTcb0Qv7QRdOpC/QvRnFMwLymkrEHX8TofCzKbJ4x7reyT1Nx0evrurogRaDB 6BZg4eDa99wA2HYlCm8wZdrgbydUlXt5owiAK9JrCmzyTwNA2zhRTekRKJkEyWFum/ l01v6/ZUpRolA== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 2BD61CE10D8; Mon, 31 Mar 2025 14:03:15 -0700 (PDT) From: "Paul E. McKenney" To: rcu@vger.kernel.org, Joel Fernandes Cc: linux-kernel@vger.kernel.org, kernel-team@meta.com, rostedt@goodmis.org, "Paul E. McKenney" , Sebastian Andrzej Siewior Subject: [PATCH v2 04/12] rcutorture: Make torture.sh --do-rt use CONFIG_PREEMPT_RT Date: Mon, 31 Mar 2025 14:03:06 -0700 Message-Id: <20250331210314.590622-4-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: quoted-printable Content-Type: text/plain; charset="utf-8" The torture.sh --do-rt command-line parameter is intended to mimic -rt kernels. Now that CONFIG_PREEMPT_RT is upstream, this commit makes this mimicking more precise. Note that testing of RCU priority boosting is disabled in favor of forward-progress testing of RCU callbacks. If it turns out to be possible to make kernels built with CONFIG_PREEMPT_RT=3Dy to tolerate testing of both, both will be enabled. Signed-off-by: Paul E. McKenney Cc: Sebastian Andrzej Siewior --- tools/testing/selftests/rcutorture/bin/torture.sh | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/rcutorture/bin/torture.sh b/tools/test= ing/selftests/rcutorture/bin/torture.sh index 0447c4a00cc4d..9cabe505585ea 100755 --- a/tools/testing/selftests/rcutorture/bin/torture.sh +++ b/tools/testing/selftests/rcutorture/bin/torture.sh @@ -448,13 +448,17 @@ fi =20 if test "$do_rt" =3D "yes" then + # In both runs, disable testing of RCU priority boosting because + # -rt doesn't like its interaction with testing of callback + # flooding. + # With all post-boot grace periods forced to normal. - torture_bootargs=3D"rcupdate.rcu_cpu_stall_suppress_at_boot=3D1 torture.d= isable_onoff_at_boot rcupdate.rcu_task_stall_timeout=3D30000 rcupdate.rcu_n= ormal=3D1" - torture_set "rcurttorture" tools/testing/selftests/rcutorture/bin/kvm.sh = --allcpus --duration "$duration_rcutorture" --configs "TREE03" --trust-make + torture_bootargs=3D"rcupdate.rcu_cpu_stall_suppress_at_boot=3D1 torture.d= isable_onoff_at_boot rcupdate.rcu_task_stall_timeout=3D30000 rcutorture.tes= t_boost=3D0 rcupdate.rcu_normal=3D1" + torture_set "rcurttorture" tools/testing/selftests/rcutorture/bin/kvm.sh = --allcpus --duration "$duration_rcutorture" --configs "TREE03" --kconfig "C= ONFIG_PREEMPT_LAZY=3Dn CONFIG_PREEMPT_RT=3Dy CONFIG_EXPERT=3Dy" --trust-make =20 # With all post-boot grace periods forced to expedited. - torture_bootargs=3D"rcupdate.rcu_cpu_stall_suppress_at_boot=3D1 torture.d= isable_onoff_at_boot rcupdate.rcu_task_stall_timeout=3D30000 rcupdate.rcu_e= xpedited=3D1" - torture_set "rcurttorture-exp" tools/testing/selftests/rcutorture/bin/kvm= .sh --allcpus --duration "$duration_rcutorture" --configs "TREE03" --trust-= make + torture_bootargs=3D"rcupdate.rcu_cpu_stall_suppress_at_boot=3D1 torture.d= isable_onoff_at_boot rcupdate.rcu_task_stall_timeout=3D30000 rcutorture.tes= t_boost=3D0 rcupdate.rcu_expedited=3D1" + torture_set "rcurttorture-exp" tools/testing/selftests/rcutorture/bin/kvm= .sh --allcpus --duration "$duration_rcutorture" --configs "TREE03" --kconfi= g "CONFIG_PREEMPT_LAZY=3Dn CONFIG_PREEMPT_RT=3Dy CONFIG_EXPERT=3Dy" --trust= -make fi =20 if test "$do_srcu_lockdep" =3D "yes" --=20 2.40.1