From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760455AbcIWP3T (ORCPT ); Fri, 23 Sep 2016 11:29:19 -0400 Received: from mail.kernel.org ([198.145.29.136]:43170 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1035332AbcIWP2q (ORCPT ); Fri, 23 Sep 2016 11:28:46 -0400 Message-Id: <20160923152839.983302701@goodmis.org> User-Agent: quilt/0.61-1 Date: Fri, 23 Sep 2016 11:28:34 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, linux-rt-users Cc: Thomas Gleixner , Carsten Emde , Sebastian Andrzej Siewior , John Kacur , Paul Gortmaker Subject: [PATCH RT 8/9] fs/dcache: incremental fixup of the retry routine References: <20160923152826.308633481@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Disposition: inline; filename=0008-fs-dcache-incremental-fixup-of-the-retry-routine.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.12.63-rt85-rc2 stable review patch. If anyone has any objections, please let me know. ------------------ From: Sebastian Andrzej Siewior It has been pointed out by tglx that on UP the non-RT task could spin its entire time slice because the lock owner is preempted. This won't happen on !RT. So we back to "chill" if we can't cond_resched() did not work. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Steven Rostedt --- fs/dcache.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/fs/dcache.c b/fs/dcache.c index cc739409efbf..b6cebcacfacd 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -39,8 +39,6 @@ #include #include #include -#include -#include #include "internal.h" #include "mount.h" @@ -656,10 +654,11 @@ kill_it: if (parent == dentry) { /* the task with the highest priority won't schedule */ r = cond_resched(); - if (!r && (rt_task(current) || dl_task(current))) + if (!r) cpu_chill(); - } else + } else { dentry = parent; + } goto repeat; } } -- 2.8.1