linux-kernel - [PATCH] sched: inaccurate calculation for normal priority

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Date:	Mon, 24 Nov 2008 20:05:01 +0800
From:	jia zhang <jia.zhang2008@...il.com>
To:	linux-kernel@...r.kernel.org
CC:	Ingo Molnar <mingo@...e.hu>
Subject: [PATCH] sched: inaccurate calculation for normal priority


Here we should check to see if the task is a rt ktherad or normal rt process, although right now MAX_USER_RT_PRIO is equal MAX_RT_PRIO.

Signed-off-by: jia zhang <jia.zhang2008@...il.com>
---
 b/kernel/sched.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index 9b1e793..b3038e4 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1711,7 +1711,8 @@ static inline int normal_prio(struct task_struct *p)
 	int prio;
 
 	if (task_has_rt_policy(p))
-		prio = MAX_RT_PRIO-1 - p->rt_priority;
+		prio = p->mm ? MAX_USER_RT_PRIO-1 - p->rt_priority :
+			MAX_RT_PRIO-1 - p->rt_priority;
 	else
 		prio = __normal_prio(p);
 	return prio;

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