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=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 056BBC433DF for ; Tue, 23 Jun 2020 00:24:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CE56020720 for ; Tue, 23 Jun 2020 00:24:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592871889; bh=BYXm29KJj9Z265W9P4EdU/JUSgSluBZZAEaSUoJJsQE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=X5gEyAhgoRzFiqAx6IyjKSkjtnbyLV3liXpqFk2hGwCZGMEXcLIFI2RzCrNy+fhzG zxYVkOCtRLEObM0sG2scNyXAWry5XoWvbLG3g8LByM6HCQ8rIg/fE6Jr+mYmmD16LW fifx1YCLn5e+HlUECcxf8Webr3jLcMQMR/dHbTbc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731815AbgFWAYt (ORCPT ); Mon, 22 Jun 2020 20:24:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:51078 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730987AbgFWAYp (ORCPT ); Mon, 22 Jun 2020 20:24:45 -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 08D1820702; Tue, 23 Jun 2020 00:24:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592871885; bh=BYXm29KJj9Z265W9P4EdU/JUSgSluBZZAEaSUoJJsQE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i7CKfT95tW8KyfFsxg+PGDlY0uHG/O2nqJn/dL8dJtxSHrRqIxikMbNu1WYuHEkhO uVA3Ma/1zlyGV992up/UImsvQAUhdBrlW53ik5d9lwV8u2PDfpTwMWBxr0G9kpUjo4 cR/KsBj4EQqWGm/pOk4O0eTZeKQc0L0pJCab4RI0= 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 1/5] rcu-tasks: Convert sleeps to idle priority Date: Mon, 22 Jun 2020 17:24:39 -0700 Message-Id: <20200623002443.25954-1-paulmck@kernel.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20200623002423.GA25869@paulmck-ThinkPad-P72> References: <20200623002423.GA25869@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() and schedule_timeout_uninterruptible() calls used by the various Tasks RCU's grace-period kthreads to schedule_timeout_idle(). This conversion avoids polluting the load-average with Tasks-RCU-related sleeping. Signed-off-by: Paul E. McKenney --- kernel/rcu/tasks.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h index ce23f6c..91fee81 100644 --- a/kernel/rcu/tasks.h +++ b/kernel/rcu/tasks.h @@ -205,7 +205,7 @@ static int __noreturn rcu_tasks_kthread(void *arg) if (!rtp->cbs_head) { WARN_ON(signal_pending(current)); set_tasks_gp_state(rtp, RTGS_WAIT_WAIT_CBS); - schedule_timeout_interruptible(HZ/10); + schedule_timeout_idle(HZ/10); } continue; } @@ -227,7 +227,7 @@ static int __noreturn rcu_tasks_kthread(void *arg) cond_resched(); } /* Paranoid sleep to keep this from entering a tight loop */ - schedule_timeout_uninterruptible(HZ/10); + schedule_timeout_idle(HZ/10); set_tasks_gp_state(rtp, RTGS_WAIT_CBS); } @@ -336,7 +336,7 @@ static void rcu_tasks_wait_gp(struct rcu_tasks *rtp) /* Slowly back off waiting for holdouts */ set_tasks_gp_state(rtp, RTGS_WAIT_SCAN_HOLDOUTS); - schedule_timeout_interruptible(HZ/fract); + schedule_timeout_idle(HZ/fract); if (fract > 1) fract--; -- 2.9.5