Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755965AbaJ1WN7 (ORCPT ); Tue, 28 Oct 2014 18:13:59 -0400 Received: from e39.co.us.ibm.com ([32.97.110.160]:54086 "EHLO e39.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755797AbaJ1WN5 (ORCPT ); Tue, 28 Oct 2014 18:13:57 -0400 From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org Cc: mingo@kernel.org, laijs@cn.fujitsu.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, dvhart@linux.intel.com, fweisbec@gmail.com, oleg@redhat.com, bobby.prani@gmail.com, "Paul E. McKenney" Subject: [PATCH tip/core/rcu 8/9] rcu: Fix FIXME in rcu_tasks_kthread() Date: Tue, 28 Oct 2014 15:10:01 -0700 Message-Id: <1414534202-27312-8-git-send-email-paulmck@linux.vnet.ibm.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1414534202-27312-1-git-send-email-paulmck@linux.vnet.ibm.com> References: <20141028220944.GA26114@linux.vnet.ibm.com> <1414534202-27312-1-git-send-email-paulmck@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14102822-0033-0000-0000-0000028046BA Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Paul E. McKenney" This commit affines rcu_tasks_kthread() to the housekeeping CPUs in CONFIG_NO_HZ_FULL builds. This is just a default, so systems administrators are free to put this kthread somewhere else if they wish. Signed-off-by: Paul E. McKenney --- kernel/rcu/update.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c index 3ef8ba58694e..8a39e68ff8e0 100644 --- a/kernel/rcu/update.c +++ b/kernel/rcu/update.c @@ -531,7 +531,8 @@ static int __noreturn rcu_tasks_kthread(void *arg) struct rcu_head *next; LIST_HEAD(rcu_tasks_holdouts); - /* FIXME: Add housekeeping affinity. */ + /* Run on housekeeping CPUs by default. Sysadm can move if desired. */ + housekeeping_affine(current); /* * Each pass through the following loop makes one check for -- 1.8.1.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/