From patchwork Wed Nov 30 18:13:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Paul E. McKenney" X-Patchwork-Id: 13060209 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 73D7BC4321E for ; Wed, 30 Nov 2022 18:13:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230062AbiK3SNs (ORCPT ); Wed, 30 Nov 2022 13:13:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229998AbiK3SNb (ORCPT ); Wed, 30 Nov 2022 13:13:31 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AB69C880E0; Wed, 30 Nov 2022 10:13:29 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 464DF61D61; Wed, 30 Nov 2022 18:13:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0E148C43153; Wed, 30 Nov 2022 18:13:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1669832008; bh=NFAW1d1m+42EgepEaaKguo2hXsVIBXe6LMvkxK6/6ng=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RrdwL+VEqHefMoZWMlt0MZVQrCX0hEEnO1UrqAtETnTeRw4rvuEZwfy/oai95PA2+ w0YezOcB9Cjpxr+sGIwHjhI8eLE0QvwV45qGjqZFH8lPxtmaa5QVtGqedkfjk3pvU9 1eysAwZV7m1EnR7tq7y463fBh+pZC3J6vwUcQ7ZAYAjDx2CrObhCSbr9ERPcZ6PUcT 0lF0Oukih3H/9iX3Qt3h/iLuTOkw/TQPcsw+f5qfX/UetXEV42MG9xaB921OR770yq 476dl+YbpwQOMrgDhR5g3uReIo1jn+IvkCBHnZP0Z+zpnqvLEJiomT3rTpc+fZy5jM SlCp+SoLxUY9A== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 65B725C14C2; Wed, 30 Nov 2022 10:13:27 -0800 (PST) From: "Paul E. McKenney" To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel-team@meta.com, rostedt@goodmis.org, "Joel Fernandes (Google)" , "Paul E . McKenney" Subject: [PATCH rcu 09/16] rcu/rcuscale: Use call_rcu_hurry() for async reader test Date: Wed, 30 Nov 2022 10:13:18 -0800 Message-Id: <20221130181325.1012760-9-paulmck@kernel.org> X-Mailer: git-send-email 2.31.1.189.g2e36527f23 In-Reply-To: <20221130181316.GA1012431@paulmck-ThinkPad-P17-Gen-1> References: <20221130181316.GA1012431@paulmck-ThinkPad-P17-Gen-1> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org From: "Joel Fernandes (Google)" rcuscale uses call_rcu() to queue async readers. With recent changes to save power, the test will have fewer async readers in flight. Use the call_rcu_hurry() API instead to revert to the old behavior. [ paulmck: Apply s/call_rcu_flush/call_rcu_hurry/ feedback from Tejun Heo. ] Signed-off-by: Joel Fernandes (Google) Signed-off-by: Paul E. McKenney --- kernel/rcu/rcuscale.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcu/rcuscale.c b/kernel/rcu/rcuscale.c index 3baded807a616..91fb5905a008f 100644 --- a/kernel/rcu/rcuscale.c +++ b/kernel/rcu/rcuscale.c @@ -176,7 +176,7 @@ static struct rcu_scale_ops rcu_ops = { .get_gp_seq = rcu_get_gp_seq, .gp_diff = rcu_seq_diff, .exp_completed = rcu_exp_batches_completed, - .async = call_rcu, + .async = call_rcu_hurry, .gp_barrier = rcu_barrier, .sync = synchronize_rcu, .exp_sync = synchronize_rcu_expedited,