From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752522Ab0LWWv7 (ORCPT ); Thu, 23 Dec 2010 17:51:59 -0500 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.124]:65201 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751947Ab0LWWvS (ORCPT ); Thu, 23 Dec 2010 17:51:18 -0500 X-Authority-Analysis: v=1.1 cv=UQuFHoD2CPQ248x8AXEbKhr4z9AaDqApxmEl3BhfZ64= c=1 sm=0 a=ve7ljmJ2nXsA:10 a=bbbx4UPp9XUA:10 a=OPBmh+XkhLl+Enan7BmTLg==:17 a=20KFwNOVAAAA:8 a=meVymXHHAAAA:8 a=QGhqEVVczRNaYH_qOG0A:9 a=7GslqZvsTGayXhC8BcL__BaK9oIA:4 a=jEp0ucaQiEUA:10 a=jeBq3FmKZ4MA:10 a=OPBmh+XkhLl+Enan7BmTLg==:117 X-Cloudmark-Score: 0 X-Originating-IP: 67.242.120.143 Message-Id: <20101223225116.245852452@goodmis.org> User-Agent: quilt/0.48-1 Date: Thu, 23 Dec 2010 17:47:57 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Thomas Gleixner , Peter Zijlstra , Lai Jiangshan Subject: [RFC][RT][PATCH 2/4] rtmutex: Try to take lock early in rt_spin_lock_slowlock() References: <20101223224755.078983538@goodmis.org> Content-Disposition: inline; filename=0002-rtmutex-Try-to-take-lock-early-in-rt_spin_lock_slowl.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Steven Rostedt Try to take the lock again as soon as we go into the rt_spin_lock_slowlock() code before doing the setup and wait loop. This makes the code closer to what the rt_mutex_slowlock() does, which will help in simplifying this code in later commits. Signed-off-by: Steven Rostedt --- kernel/rtmutex.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c index f0ce334..318d7ed 100644 --- a/kernel/rtmutex.c +++ b/kernel/rtmutex.c @@ -829,6 +829,11 @@ rt_spin_lock_slowlock(struct rt_mutex *lock) raw_spin_lock_irqsave(&lock->wait_lock, flags); init_lists(lock); + if (do_try_to_take_rt_mutex(lock, STEAL_LATERAL)) { + raw_spin_unlock_irqrestore(&lock->wait_lock, flags); + return; + } + BUG_ON(rt_mutex_owner(lock) == current); /* -- 1.7.2.3