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=-9.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 C3BD2C433E0 for ; Sun, 21 Jun 2020 18:37:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9757225227 for ; Sun, 21 Jun 2020 18:37:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="Y77qRJBZ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729550AbgFUShm (ORCPT ); Sun, 21 Jun 2020 14:37:42 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:42278 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728649AbgFUShl (ORCPT ); Sun, 21 Jun 2020 14:37:41 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1592764661; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=1m9LqaPA7q87uBqQLzmBOLr4aMCHc+FIo6y028MdmMU=; b=Y77qRJBZZSvL8zsaXUx8HlRk6xbW7grkJup5l6d3GABlFxlU1z801hthI2THjKju+vNEYpOq Y32nj+ZOhar7cYQZ9LNghD5dcUPbiO8Td9hKAp3KsN6MNYjfBza5Gwd9veQ6Fyq6g3myCZQK yrmox+BMFNipJYECFi+FbIXZjNU= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyI0MWYwYSIsICJsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n09.prod.us-east-1.postgun.com with SMTP id 5eefa8ed0206ad41d1d3b702 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Sun, 21 Jun 2020 18:37:33 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id A659FC4339C; Sun, 21 Jun 2020 18:37:32 +0000 (UTC) Received: from localhost (blr-c-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: neeraju) by smtp.codeaurora.org (Postfix) with ESMTPSA id 5E9DDC433CA; Sun, 21 Jun 2020 18:37:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 5E9DDC433CA 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=none 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/tree: Force quiescent state on callback overload Date: Mon, 22 Jun 2020 00:07:27 +0530 Message-Id: <1592764647-2452-1-git-send-email-neeraju@codeaurora.org> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On callback overload, we want to force quiescent state immediately, for the first and second fqs. Enforce the same, by including RCU_GP_FLAG_OVLD flag, in fqsstart check. Signed-off-by: Neeraj Upadhyay --- kernel/rcu/tree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index d0988a1..6226bfb 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -1865,7 +1865,7 @@ static void rcu_gp_fqs_loop(void) break; /* If time for quiescent-state forcing, do it. */ if (!time_after(rcu_state.jiffies_force_qs, jiffies) || - (gf & RCU_GP_FLAG_FQS)) { + (gf & (RCU_GP_FLAG_FQS | RCU_GP_FLAG_OVLD))) { trace_rcu_grace_period(rcu_state.name, rcu_state.gp_seq, TPS("fqsstart")); rcu_gp_fqs(first_gp_fqs); -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project