From: Con Kolivas <kernel@kolivas.org>

More aggressive nice discrimination by the Staircase-Deadline cpu scheduler
means ksoftirqd is getting significantly less cpu than previously.  Adjust
nice value accordingly for similar cpu distribution.

Signed-off-by: Con Kolivas <kernel@kolivas.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 kernel/softirq.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -puN kernel/softirq.c~sched-increase-ksoftirqd-priority kernel/softirq.c
--- a/kernel/softirq.c~sched-increase-ksoftirqd-priority
+++ a/kernel/softirq.c
@@ -489,7 +489,7 @@ void __init softirq_init(void)
 
 static int ksoftirqd(void * __bind_cpu)
 {
-	set_user_nice(current, 19);
+	set_user_nice(current, 15);
 	current->flags |= PF_NOFREEZE;
 
 	set_current_state(TASK_INTERRUPTIBLE);
_