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 683F7C433DF for ; Tue, 23 Jun 2020 00:22:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3AB03208B8 for ; Tue, 23 Jun 2020 00:22:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592871726; bh=DGy4EdNKG0yljU+ZxMTFgQoinjFh+ymTJxVXMdydMzg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MAXPo14R1nu1XQ6lK4jKyiotPCtVZrcOLnQAgS20lpZ9Q/j29aLKBqk/eFEQNxk1H tt2QP0y80j0EhMzZ4wr/raers7pXzy8raioi/xXQ3w1b+1dR6Z0GMiVbrp0Jy3s0TY 4QXuVNHUKgdAmGfJCIynrFKZDfv3MUt0DIk3q2FQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731637AbgFWAWF (ORCPT ); Mon, 22 Jun 2020 20:22:05 -0400 Received: from mail.kernel.org ([198.145.29.99]:48094 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731496AbgFWAVv (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 4597520857; Tue, 23 Jun 2020 00:21:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592871711; bh=DGy4EdNKG0yljU+ZxMTFgQoinjFh+ymTJxVXMdydMzg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Bu/H9mPTtzQhsrTWNwFzPrC02vg+1jZPjxukM5Z+j4HYG4aoLp3a9aBmp1A/B90jQ vm0oWD0CxH+RM0EKL3qvcTtZKcAbZjZNoCXWY3E/CySnVj/jCtzqUvnE1QE+gpHJWh jK/5m1q1EFMhw1CufD3/cGLQSCi/HrgA9B1TRACY= 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 10/26] rcu: Expedited grace-period sleeps to idle priority Date: Mon, 22 Jun 2020 17:21:31 -0700 Message-Id: <20200623002147.25750-10-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 schedule_timeout_uninterruptible() call used by RCU's expedited grace-period processing to schedule_timeout_idle(). This conversion avoids polluting the load-average with RCU-related sleeping. Signed-off-by: Paul E. McKenney --- kernel/rcu/tree_exp.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h index 72952ed..1888c0e 100644 --- a/kernel/rcu/tree_exp.h +++ b/kernel/rcu/tree_exp.h @@ -403,7 +403,7 @@ static void sync_rcu_exp_select_node_cpus(struct work_struct *wp) /* Online, so delay for a bit and try again. */ raw_spin_unlock_irqrestore_rcu_node(rnp, flags); trace_rcu_exp_grace_period(rcu_state.name, rcu_exp_gp_seq_endval(), TPS("selectofl")); - schedule_timeout_uninterruptible(1); + schedule_timeout_idle(1); goto retry_ipi; } /* CPU really is offline, so we must report its QS. */ -- 2.9.5