[PATCH] Update cfq io scheduler to time sliced design

[pandora-kernel.git] / kernel / itimer.c

diff --git a/kernel/itimer.c b/kernel/itimer.c
index e9a40e9..1dc988e 100644 (file)
--- a/kernel/itimer.c
+++ b/kernel/itimer.c
@@ -123,7 +123,11 @@ static inline void it_real_arm(struct task_struct *p, unsigned long interval)
                return;
        if (interval > (unsigned long) LONG_MAX)
                interval = LONG_MAX;
-       p->signal->real_timer.expires = jiffies + interval;
+       /* the "+ 1" below makes sure that the timer doesn't go off before
+        * the interval requested. This could happen if
+        * time requested % (usecs per jiffy) is more than the usecs left
+        * in the current jiffy */
+       p->signal->real_timer.expires = jiffies + interval + 1;
        add_timer(&p->signal->real_timer);
 }