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authorAndi Kleen <ak@suse.de>2007-05-02 19:27:21 +0200
committerAndi Kleen <andi@basil.nowhere.org>2007-05-02 19:27:21 +0200
commit3bea9c9793a17053e05d970e5d90d48fc9fce07d (patch)
tree23d742f3176b4e61512e81723febe7a02822408a /arch/x86_64/mm/k8topology.c
parent[PATCH] x86: Use RDTSCP for synchronous get_cycles if possible (diff)
downloadlinux-dev-3bea9c9793a17053e05d970e5d90d48fc9fce07d.tar.xz
linux-dev-3bea9c9793a17053e05d970e5d90d48fc9fce07d.zip
[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>
Diffstat (limited to '')
-rw-r--r--arch/x86_64/mm/k8topology.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86_64/mm/k8topology.c b/arch/x86_64/mm/k8topology.c
index 60e860e5ef4c..f983c75825d0 100644
--- a/arch/x86_64/mm/k8topology.c
+++ b/arch/x86_64/mm/k8topology.c
@@ -62,6 +62,8 @@ int __init k8_scan_nodes(unsigned long start, unsigned long end)
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);