patch-2.4.5 linux/kernel/fork.c

• Lines: 26
• Date: Mon Apr 30 22:23:29 2001
• Orig file: v2.4.4/linux/kernel/fork.c
• Orig date: Thu Apr 26 06:11:17 2001

diff -u --recursive --new-file v2.4.4/linux/kernel/fork.c linux/kernel/fork.c
@@ -666,17 +666,15 @@
 	p->pdeath_signal = 0;
 
 	/*
-	 * Give the parent's dynamic priority entirely to the child.  The
-	 * total amount of dynamic priorities in the system doesn't change
-	 * (more scheduling fairness), but the child will run first, which
-	 * is especially useful in avoiding a lot of copy-on-write faults
-	 * if the child for a fork() just wants to do a few simple things
-	 * and then exec(). This is only important in the first timeslice.
-	 * In the long run, the scheduling behavior is unchanged.
+	 * "share" dynamic priority between parent and child, thus the
+	 * total amount of dynamic priorities in the system doesnt change,
+	 * more scheduling fairness. This is only important in the first
+	 * timeslice, on the long run the scheduling behaviour is unchanged.
 	 */
-	p->counter = current->counter;
-	current->counter = 0;
-	current->need_resched = 1;
+	p->counter = (current->counter + 1) >> 1;
+	current->counter >>= 1;
+	if (!current->counter)
+		current->need_resched = 1;
 
 	/*
 	 * Ok, add it to the run-queues and make it