[PATCH] x86-64: Don't enable NUMA for a single node in K8 NUMA scanning
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>
diff --git a/arch/x86_64/mm/k8topology.c b/arch/x86_64/mm/k8topology.c
index 60e860e..f983c75 100644
--- a/arch/x86_64/mm/k8topology.c
+++ b/arch/x86_64/mm/k8topology.c
@@ -62,6 +62,8 @@
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);