linux-kernel - [PATCH 3/4] RT: Add support for updating push-rt priority under PI boost

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Message-ID: <20071016160908.5202.69086.stgit@novell1.haskins.net>
Date:	Tue, 16 Oct 2007 12:09:08 -0400
From:	Gregory Haskins <ghaskins@...ell.com>
To:	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	RT <linux-rt-users@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	Gregory Haskins <ghaskins@...ell.com>
Subject: [PATCH 3/4] RT: Add support for updating push-rt priority under PI
	boost

Priority of the running task can change at run-time due to
PI boosting / nice, so be sure to update the RQ version of
the priority as well.

Signed-off-by: Gregory Haskins <ghaskins@...ell.com>
---

 kernel/sched.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index b69e49b..bc9f4a6 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -4656,6 +4656,7 @@ void rt_mutex_setprio(struct task_struct *p, int prio)
 		 * this runqueue and our priority is higher than the current's
 		 */
 		if (task_running(rq, p)) {
+			set_rq_prio(rq, p->prio);
 			if (p->prio > oldprio)
 				resched_task(rq->curr);
 		} else {
@@ -4715,6 +4716,9 @@ void set_user_nice(struct task_struct *p, long nice)
 		 */
 		if (delta < 0 || (delta > 0 && task_running(rq, p)))
 			resched_task(rq->curr);
+
+		if (delta && task_running(rq, p))
+			set_rq_prio(rq, p->prio);
 	}
 out_unlock:
 	task_rq_unlock(rq, &flags);

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