From patchwork Tue Nov 22 01:04:15 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: 13051755 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 A05F4C4332F for ; Tue, 22 Nov 2022 01:04:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232038AbiKVBEb (ORCPT ); Mon, 21 Nov 2022 20:04:31 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44822 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231978AbiKVBE0 (ORCPT ); Mon, 21 Nov 2022 20:04:26 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 08BA51E3C8; Mon, 21 Nov 2022 17:04:25 -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 ams.source.kernel.org (Postfix) with ESMTPS id A2C31B818BC; Tue, 22 Nov 2022 01:04:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2792FC43153; Tue, 22 Nov 2022 01:04:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1669079063; bh=tEjic2DFB31t8ylkVSWil0ue1UwVOCBgRrj8WJMVg8E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RZFElDl2xa4aU5vs66KvPsfhJM1wHZrsTZBTpjiD4mvRVzWPd/qFRpvxjTHLDtbpR 81R58GX8DRLeUP4eWFKGcCWLVnO3hj4SovbJDEh92KpZlSlmDtI9pvZzAxG20JMlG9 Y2iuiCPzH+qhERyfj4mAo6wFBtjvY9uYJAPqRXqpovdimnt9NhP4ByYdTZWy4USGMC BgdSNXKfQ64/8o92FmI0Ep069lODyXBJqCbHSBnGp5hY2GUWFneAMvJVet4vivyAsQ FBZBvm4LvG4XrYDxOEC5lZbtq8JWMq4MXt78BrPxWo+G1xzax7oRkLe9zOLFvusB8M HrsI8JtVdB9oQ== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 837DC5C146A; Mon, 21 Nov 2022 17:04:22 -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 v2 rcu 10/16] rcu/rcuscale: Use call_rcu_flush() for async reader test Date: Mon, 21 Nov 2022 17:04:15 -0800 Message-Id: <20221122010421.3799681-10-paulmck@kernel.org> X-Mailer: git-send-email 2.31.1.189.g2e36527f23 In-Reply-To: <20221122010408.GA3799268@paulmck-ThinkPad-P17-Gen-1> References: <20221122010408.GA3799268@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_flush() API instead to revert to the old behavior. 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..3b149e745a0f6 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_flush, .gp_barrier = rcu_barrier, .sync = synchronize_rcu, .exp_sync = synchronize_rcu_expedited,