--- mm/oom_kill.c.orig	2007-08-01 10:41:53.000000000 -0700
+++ mm/oom_kill.c	2008-02-04 14:47:10.000000000 -0800
@@ -83,11 +83,14 @@
 	 * machine with an endless amount of children. In case a single
 	 * child is eating the vast majority of memory, adding only half
 	 * to the parents will make the child our kill candidate of choice.
+	 * When counting the children's vmsize against the parent, we
+	 * subtract shared_vm first, to avoid overcounting memory that is
+	 * shared among the child processes and the parent.
 	 */
 	list_for_each_entry(child, &p->children, sibling) {
 		task_lock(child);
 		if (child->mm != mm && child->mm)
-			points += child->mm->total_vm/2 + 1;
+			points += (child->mm->total_vm - child->mm->shared_vm)/2 + 1;
 		task_unlock(child);
 	}