From patchwork Mon Mar 10 18:38:04 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Paul E. McKenney" X-Patchwork-Id: 14010539 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 60AE617A2E8; Mon, 10 Mar 2025 18:38:12 +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=1741631892; cv=none; b=PZ3UXwsgDVutX94B3gCq7Ayvz+UzcpA9fAbvxqJKwoC1ZpNCz6PLmQ5N6trif7E4zPngsX8waBM+cNgCFLiHEUp8RPBAHj/nnYHn5SK9SfDmTf5DV3OA6tqgq9f00Zh4+mzDUBonCIdX0JYlv3zmn9s7fl/KNaICjUjgwdygrhQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741631892; c=relaxed/simple; bh=9sDMN4XZIcJRgoHQjxyZQce37ueUrgjbAHGywNbSEVo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=AFln4PKVY1BNA+BXy42b0gdijN46TcGfTb/bQKd6GDEcskUQZ/1p1VVbuVjY76jDMqM9IdmuSzjR/6iGqUE9w9pgbKL4/ouH3t1KU+uHQP1kvnlMKnP5urQHWKYJXqHd6cQ3FkdFm0p/OiRG3VUIlXYiy/7m3KFWBkjtye8zpYM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kBraPChY; 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="kBraPChY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1A07AC4CEF0; Mon, 10 Mar 2025 18:38:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1741631892; bh=9sDMN4XZIcJRgoHQjxyZQce37ueUrgjbAHGywNbSEVo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kBraPChYmnALx5Y2wGL+tBRbECOLIs4TW2P4nZbpnFuKeO0FqxNljMlOuYV2vLPHR 8Qt756opii3LzhM9xrENH5OcEPorhFasrFb9rD/tSvfbU6jFUSlJOF6CjAslNFutlj 2z3xfeyQHn5DXbqDIttpaWgv48iQxsvUNFeyq2cxhik5AAbkMXruBV0NCRYxQctU+e WlJgXodlSLRsulWx/imFSqlIRIFcQxnv0vBClkr2B4hEx8dIo96d08Ofhsju3QQNPQ jgYb7O86WCqCvE/4zhxuUfmLulnGz1T9oAl0GRIhBInAd6/XPBVqPYsn2EfD0l6Nj2 sX442rE1AfN4g== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 9663DCE1163; Mon, 10 Mar 2025 11:38:11 -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" , Sebastian Andrzej Siewior Subject: [PATCH 4/9] rcutorture: Make torture.sh --do-rt use CONFIG_PREEMPT_RT Date: Mon, 10 Mar 2025 11:38:04 -0700 Message-Id: <20250310183809.3576320-4-paulmck@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <4bf081c8-9299-4ee3-b337-d5b751cef6be@paulmck-laptop> References: <4bf081c8-9299-4ee3-b337-d5b751cef6be@paulmck-laptop> Precedence: bulk X-Mailing-List: rcu@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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=y 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/testing/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 if test "$do_rt" = "yes" then + # In both runs, disable testing of RCU priority boosting because + # -rt doesn't like its interaction with testing of callback + # flooding. + # With all post-boot grace periods forced to normal. - torture_bootargs="rcupdate.rcu_cpu_stall_suppress_at_boot=1 torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000 rcupdate.rcu_normal=1" - torture_set "rcurttorture" tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration "$duration_rcutorture" --configs "TREE03" --trust-make + torture_bootargs="rcupdate.rcu_cpu_stall_suppress_at_boot=1 torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000 rcutorture.test_boost=0 rcupdate.rcu_normal=1" + torture_set "rcurttorture" tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration "$duration_rcutorture" --configs "TREE03" --kconfig "CONFIG_PREEMPT_LAZY=n CONFIG_PREEMPT_RT=y CONFIG_EXPERT=y" --trust-make # With all post-boot grace periods forced to expedited. - torture_bootargs="rcupdate.rcu_cpu_stall_suppress_at_boot=1 torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000 rcupdate.rcu_expedited=1" - torture_set "rcurttorture-exp" tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration "$duration_rcutorture" --configs "TREE03" --trust-make + torture_bootargs="rcupdate.rcu_cpu_stall_suppress_at_boot=1 torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000 rcutorture.test_boost=0 rcupdate.rcu_expedited=1" + torture_set "rcurttorture-exp" tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration "$duration_rcutorture" --configs "TREE03" --kconfig "CONFIG_PREEMPT_LAZY=n CONFIG_PREEMPT_RT=y CONFIG_EXPERT=y" --trust-make fi if test "$do_srcu_lockdep" = "yes"