My machine did not boot with CONFIG_NR_CPUS = 4.  Same .config as one
used for 2.5.44-mm2.  Could be the __node_to_cpu_mask redifinition from
the larger-cpu-masks patch .... 

I think Rusty is asleep now, but he sent me this earlier ... want
to try it? I just cut & pasted, so you'll have to apply it by hand.
As it is, you'll get 0 size for NR_CPUS < 8 I think.

M.

2.5.44-mm3-node-fix/include/asm-generic/topology.h

--- linux-2.5.44-mm3/include/asm-generic/topology.h	2002-10-23 12:03:14.000000000 +1000
+++ working-2.5.44-mm3-node-fix/include/asm-generic/topology.h	2002-10-23 19:47:36.000000000 +1000

@@ -42,7 +42,7 @@
 #define __node_to_first_cpu(node)	(0)
 #endif
 #ifndef __node_to_cpu_mask
-#define __node_to_cpu_mask(mask, node)	(memset((mask), 0xFF, NR_CPUS/8))
+#define __node_to_cpu_mask(mask, node)	(memset((mask), 0xFF, (NR_CPUS+7)/8))
 #endif
 #ifndef __node_to_memblk
 #define __node_to_memblk(node)		(0)


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