Re: [patch] Real-Time Preemption, -RT-2.6.12-rc6-V0.7.47-20

[Steven Rostedt]

On Tue, 2005-06-07 at 13:04 +0200, Ingo Molnar wrote:
> i have released the -V0.7.47-20 Real-Time Preemption patch, which can be 
> downloaded from the usual place:
> 

Ingo,

Here's the MAX_USER_RT_PRIO patch against your kernel.

-- Steve

--- kernel/sched.c.orig	2005-06-07 07:25:37.000000000 -0400
+++ kernel/sched.c	2005-06-07 07:27:38.000000000 -0400
@@ -2865,7 +2865,7 @@ static void trace_array(prio_array_t *ar
 			trace_special_pid(p->pid, p->prio,
 				p->policy == SCHED_NORMAL ?
 					p->static_prio :
-					MAX_USER_RT_PRIO - p->rt_priority);
+					(MAX_RT_PRIO-1) - p->rt_priority);
 		}
 	}
 }
@@ -3632,7 +3632,7 @@ int mutex_getprio(task_t *p)
 	int prio;
 
 	if (p->policy != SCHED_NORMAL)
-		prio = MAX_USER_RT_PRIO-1 - p->rt_priority;
+		prio = MAX_RT_PRIO-1 - p->rt_priority;
 	else
 		prio = __effective_prio(p);
 	trace_special_pid(p->pid, p->prio, prio);
@@ -3794,7 +3794,7 @@ static void __setscheduler(struct task_s
 	p->policy = policy;
 	p->rt_priority = prio;
 	if (policy != SCHED_NORMAL)
-		p->prio = MAX_USER_RT_PRIO-1 - p->rt_priority;
+		p->prio = MAX_RT_PRIO-1 - p->rt_priority;
 	else
 		p->prio = p->static_prio;
 }
@@ -3826,7 +3826,8 @@ recheck:
 	 * 1..MAX_USER_RT_PRIO-1, valid priority for SCHED_NORMAL is 0.
 	 */
 	if (param->sched_priority < 0 ||
-	    param->sched_priority > MAX_USER_RT_PRIO-1)
+	    (p->mm && param->sched_priority > MAX_USER_RT_PRIO-1) ||
+	    (!p->mm && param->sched_priority > MAX_RT_PRIO-1))
 		return -EINVAL;
 	if ((policy == SCHED_NORMAL) != (param->sched_priority == 0))
 		return -EINVAL;


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