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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 9C144C433DF for ; Tue, 23 Jun 2020 00:23:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7E32220702 for ; Tue, 23 Jun 2020 00:23:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592871796; bh=5KDY+n04rpxhpLhPUfPZ/lQBunRbEeYpva1R7qPZAPI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=tQkZlirj09rGr2GqVtPUuknFbzAT9nGxfz17mPr6gz3+5artNyzUnQ/lfNtkG9jQ0 RYH0TCLUAtFRFeEubGYuPzamI6rpj/NZDhbcpvpNz75Ruk3uL+nYfgHq3KBkMSQ2V1 oYWPErh/kd2BcCfRvtBLi7WM2CBSD4Ki8YTcL9q4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731795AbgFWAXM (ORCPT ); Mon, 22 Jun 2020 20:23:12 -0400 Received: from mail.kernel.org ([198.145.29.99]:48132 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731481AbgFWAVv (ORCPT ); Mon, 22 Jun 2020 20:21:51 -0400 Received: from paulmck-ThinkPad-P72.home (50-39-105-78.bvtn.or.frontiernet.net [50.39.105.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DAD822083E; Tue, 23 Jun 2020 00:21:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592871711; bh=5KDY+n04rpxhpLhPUfPZ/lQBunRbEeYpva1R7qPZAPI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QxuvlQW1X6hxWBXqO0vDM8pWXObyCmc1iCkO4AfDguyLSVralzTZ9+LXYqjq8R+7r P24GjBLthFsaq8C+vGFfAP+6dlAWe2bNFZtANGVn5vErAHowvm2wnHZpoBr6Z0XlZV elWGrUobrIdPk+3kaPY1sXXeT7WdCkdfbiTFHTPE= From: paulmck@kernel.org To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com, mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org, "Paul E. McKenney" Subject: [PATCH tip/core/rcu 08/26] rcu: Priority-boost-related sleeps to idle priority Date: Mon, 22 Jun 2020 17:21:29 -0700 Message-Id: <20200623002147.25750-8-paulmck@kernel.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20200623002128.GA25456@paulmck-ThinkPad-P72> References: <20200623002128.GA25456@paulmck-ThinkPad-P72> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Paul E. McKenney" This commit converts the long-standing schedule_timeout_interruptible() call used by RCU's priority-boosting kthreads to schedule_timeout_idle(). This conversion avoids polluting the load-average with RCU-related sleeping. Signed-off-by: Paul E. McKenney --- kernel/rcu/tree_plugin.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 3522236..25296c1 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -1033,7 +1033,7 @@ static int rcu_boost_kthread(void *arg) if (spincnt > 10) { WRITE_ONCE(rnp->boost_kthread_status, RCU_KTHREAD_YIELDING); trace_rcu_utilization(TPS("End boost kthread@rcu_yield")); - schedule_timeout_interruptible(2); + schedule_timeout_idle(2); trace_rcu_utilization(TPS("Start boost kthread@rcu_yield")); spincnt = 0; } -- 2.9.5