[PATCH] [18/30] x86_64: Don't enable NUMA for a single node in K8 NUMA scanning

[Andi Kleen <ak@suse.de>]

This was supposed to see the full memory on a ASUS A8SX motherboard
with 4GB RAM where the northbridge reports less memory, but it didn't
help there. But it's a reasonable change so let's include it anyways.

Signed-off-by: Andi Kleen <ak@suse.de>

---
 arch/x86_64/mm/k8topology.c |    2 ++
 1 file changed, 2 insertions(+)

Index: linux/arch/x86_64/mm/k8topology.c
===================================================================
--- linux.orig/arch/x86_64/mm/k8topology.c
+++ linux/arch/x86_64/mm/k8topology.c
@@ -62,6 +62,8 @@ int __init k8_scan_nodes(unsigned long s
 
 	reg = read_pci_config(0, nb, 0, 0x60); 
 	numnodes = ((reg >> 4) & 0xF) + 1;
+	if (numnodes <= 1)
+		return -1;
 
 	printk(KERN_INFO "Number of nodes %d\n", numnodes);
 
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/