Index: linux-2.6/Documentation/kernel-parameters.txt
===================================================================
--- linux-2.6.orig/Documentation/kernel-parameters.txt	2008-09-16 18:05:06.000000000 -0700
+++ linux-2.6/Documentation/kernel-parameters.txt	2008-09-16 18:10:42.000000000 -0700
@@ -1650,6 +1650,13 @@ and is between 256 and 4096 characters. 
 			may fail if this is set too low.
 			Default is 8000 bytes.
 
+	percpu=		Configure the number of percpu bytes that can be
+			dynamically allocated. This is used for per cpu
+			variables of modules and other dynamic per cpu data
+			structures. Creation of per cpu structures after boot
+			may fail if this is set too low.
+			Default is 8000 bytes.
+
 	pf.		[PARIDE]
 			See Documentation/paride.txt.
 
Index: linux-2.6/mm/cpu_alloc.c
===================================================================
--- linux-2.6.orig/mm/cpu_alloc.c	2008-09-16 18:10:28.000000000 -0700
+++ linux-2.6/mm/cpu_alloc.c	2008-09-16 18:10:42.000000000 -0700
@@ -123,6 +123,9 @@ void *cpu_alloc(unsigned long size, gfp_
 
 	ptr = __per_cpu_end + start;
 
+	printk(KERN_INFO "%d per cpu units allocated at offset %lx address %p",
+		units, start, ptr);
+
 	if (gfpflags & __GFP_ZERO) {
 		int cpu;
 
@@ -164,18 +167,20 @@ void cpu_free(void *start, unsigned long
 		first_free = index;
 
 	spin_unlock_irqrestore(&cpu_alloc_map_lock, flags);
+	printk(KERN_INFO "%d per cpu units freed.\n", units);
 }
 EXPORT_SYMBOL(cpu_free);
 
 
 int cpu_alloc_init(void)
 {
+
 	nr_units = percpu_reserve / UNIT_SIZE;
 
 	cpu_alloc_map = alloc_bootmem(BITS_TO_LONGS(nr_units));
 
+	printk(KERN_INFO "Per cpu allocator: %d bytes / %d allocation units.\n",
+					percpu_reserve, nr_units);
 	return 0;
 }
 
-early_initcall(cpu_alloc_init);
-