From: Gregory Haskins <ghaskins@novell.com>
To: mingo@elte.hu, tglx@linutronix.de, rostedt@goodmis.org,
linux-rt-users@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, sdietrich@novell.com,
pmorreale@novell.com, mkohari@novell.com, ghaskins@novell.com
Subject: [PATCH 3/5] rtmutex: use task->oncpu to save a call
Date: Tue, 20 May 2008 10:49:26 -0400 [thread overview]
Message-ID: <20080520144925.15992.56716.stgit@novell1.haskins.net> (raw)
In-Reply-To: <20080520143954.15992.85900.stgit@novell1.haskins.net>
Signed-off-by: Gregory Haskins <ghaskins@novell.com>
---
kernel/rtmutex.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c
index 8ae9de3..b6ff1eb 100644
--- a/kernel/rtmutex.c
+++ b/kernel/rtmutex.c
@@ -738,7 +738,7 @@ static int adaptive_wait(struct rt_mutex_waiter *waiter,
}
/* Owner went to bed, so should we */
- if (!task_is_current(orig_owner)) {
+ if (!orig_owner->oncpu) {
sleep = 1;
rcu_read_unlock();
break;
next prev parent reply other threads:[~2008-05-20 15:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-20 14:49 [PATCH 0/5] RT: adaptive-lock enhancements Gregory Haskins
2008-05-20 14:49 ` [PATCH 1/5] optimize rt lock wakeup Gregory Haskins
2008-05-20 14:49 ` [PATCH 2/5] sched: make task->oncpu available in all configurations Gregory Haskins
2008-05-20 14:49 ` Gregory Haskins [this message]
2008-05-20 14:49 ` [PATCH 4/5] adjust pi_lock usage in wakeup Gregory Haskins
2008-05-20 14:49 ` [PATCH 5/5] remove the extra call to try_to_take_lock Gregory Haskins
2008-05-24 3:02 ` Steven Rostedt
2008-05-24 3:30 ` Gregory Haskins
2008-05-24 14:11 ` Peter W. Morreale
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