diff -Nur linux-2.6.3/include/asm-i386/resource.h linux/include/asm-i386/resource.h
--- linux-2.6.3/include/asm-i386/resource.h	2004-02-18 00:57:16.000000000 -0500
+++ linux/include/asm-i386/resource.h	2004-03-07 14:00:09.000000000 -0500
@@ -16,8 +16,9 @@
 #define RLIMIT_MEMLOCK	8		/* max locked-in-memory address space */
 #define RLIMIT_AS	9		/* address space limit */
 #define RLIMIT_LOCKS	10		/* maximum file locks held */
+#define RLIMIT_DEPTH	11		/* max process depth */
 
-#define RLIM_NLIMITS	11
+#define RLIM_NLIMITS	12
 
 /*
  * SuS says limits have to be unsigned.
@@ -40,6 +41,7 @@
 	{ RLIM_INFINITY, RLIM_INFINITY },		\
 	{ RLIM_INFINITY, RLIM_INFINITY },		\
 	{ RLIM_INFINITY, RLIM_INFINITY },		\
+	{ RLIM_INFINITY, RLIM_INFINITY },		\
 }
 
 #endif /* __KERNEL__ */
diff -Nur linux-2.6.3/kernel/fork.c linux/kernel/fork.c
--- linux-2.6.3/kernel/fork.c	2004-02-18 00:57:14.000000000 -0500
+++ linux/kernel/fork.c	2004-03-07 13:56:45.000000000 -0500
@@ -1008,6 +1008,20 @@
 		p->real_parent = current;
 	p->parent = p->real_parent;
 
+
+	/*
+	 *  Check if the RLIMIT_DEPTH was set and then if parent 
+	 *  have a spare depth. Finally update child's depth limits. 
+	 */
+	if (p->parent->rlim[RLIMIT_DEPTH].rlim_cur != RLIM_INFINITY) {
+		if (!p->parent->rlim[RLIMIT_DEPTH].rlim_cur) {
+			retval = -EPERM;
+			goto bad_fork_cleanup_namespace;
+		}
+		p->rlim[RLIMIT_DEPTH].rlim_cur = p->parent->rlim[RLIMIT_DEPTH].rlim_cur - 1;
+		p->rlim[RLIMIT_DEPTH].rlim_max = p->parent->rlim[RLIMIT_DEPTH].rlim_max - 1;
+	}
+
 	if (clone_flags & CLONE_THREAD) {
 		spin_lock(&current->sighand->siglock);
 		/*