From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ED3ADC433E0 for ; Mon, 11 Jan 2021 11:46:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A3DC922527 for ; Mon, 11 Jan 2021 11:46:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729909AbhAKLqI (ORCPT ); Mon, 11 Jan 2021 06:46:08 -0500 Received: from so254-31.mailgun.net ([198.61.254.31]:36851 "EHLO so254-31.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725868AbhAKLqI (ORCPT ); Mon, 11 Jan 2021 06:46:08 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1610365544; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=phlq0VMVBR4TsRWMuHemTdrgrkpRg2OyM5+rf5MITYc=; b=DBLwg1S94z3flnVg+nqqFqD3OtQ3ZBpzpFxhuvoImrqAU4BuXvgzJBQjNyNVagKpc58X4ynj 0UsARje9XMh2yLRE6/R3XpFEpgdL70gLJBHGNOLysHQ5eWkETkPUBjPSzBtzy/b3kBJy51M2 4arV5bgAd/nQfVb82iQNyuxRtYM= X-Mailgun-Sending-Ip: 198.61.254.31 X-Mailgun-Sid: WyJkZDlkNSIsICJyY3VAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n08.prod.us-west-2.postgun.com with SMTP id 5ffc3a462a47972bcc2e88d9 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 11 Jan 2021 11:45:10 GMT Sender: neeraju=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 31B28C43462; Mon, 11 Jan 2021 11:45:10 +0000 (UTC) Received: from localhost (unknown [202.46.22.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: neeraju) by smtp.codeaurora.org (Postfix) with ESMTPSA id BB819C433ED; Mon, 11 Jan 2021 11:45:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org BB819C433ED Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=neeraju@codeaurora.org From: Neeraj Upadhyay To: paulmck@kernel.org, josh@joshtriplett.org, rostedt@goodmis.org, mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com, joel@joelfernandes.org Cc: rcu@vger.kernel.org, linux-kernel@vger.kernel.org, Neeraj Upadhyay Subject: [PATCH] rcu: Only trace when cbs are accelerated Date: Mon, 11 Jan 2021 17:15:01 +0530 Message-Id: <1610365501-6196-1-git-send-email-neeraju@codeaurora.org> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org Fix rcu_accelerate_cbs() traces to only trace when cbs are accelerated in current call. Signed-off-by: Neeraj Upadhyay --- kernel/rcu/tree.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 804e543..338b817 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -1508,8 +1508,9 @@ static bool rcu_accelerate_cbs(struct rcu_node *rnp, struct rcu_data *rdp) * number. */ gp_seq_req = rcu_seq_snap(&rcu_state.gp_seq); - if (rcu_segcblist_accelerate(&rdp->cblist, gp_seq_req)) - ret = rcu_start_this_gp(rnp, rdp, gp_seq_req); + if (!rcu_segcblist_accelerate(&rdp->cblist, gp_seq_req)) + return ret; + ret = rcu_start_this_gp(rnp, rdp, gp_seq_req); /* Trace depending on how much we were able to accelerate. */ if (rcu_segcblist_restempty(&rdp->cblist, RCU_WAIT_TAIL)) -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project