Hello, Dave.
On Wed, Nov 28, 2012 at 04:03:58PM -0800, Dave Hansen wrote:
> My system is just qemu booted with:
>
> -smp 8 -m 8192 -numa node,nodeid=0,cpus=0-3 -numa node,nodeid=1,cpus=4-7
>
> Watch the "PERCPU:" line early in boot, and you can see the "Embedded"
> come and go with or without your patch:
>
> [ 0.000000] PERCPU: Embedded 11 pages/cpu @f3000000 s30592 r0 d14464
> vs
> [ 0.000000] PERCPU: 11 4K pages/cpu @f83fe000 s30592 r0 d14464
...
> I don't have a fix handy because I'm working on the original problem,
> but I just happened to run across this during a bisect.
Just tested 3.7-rc7 w/ qemu and it works as expected here.
Can you please boot with the following debug patch and report the boot
message before and after?
Thanks.
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 5cdff03..1133dc8 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -71,9 +71,13 @@ static bool __init pcpu_need_numa(void)
for_each_possible_cpu(cpu) {
int node = early_cpu_to_node(cpu);
+ printk("XXX pcpu_need_numa: cpu%d@%d online=%d ND=%p\n",
+ cpu, node, node_online(node), NODE_DATA(node));
if (node_online(node) && NODE_DATA(node) &&
- last && last != NODE_DATA(node))
+ last && last != NODE_DATA(node)) {
+ printk("XXX need numa\n");
return true;
+ }
last = NODE_DATA(node);
}
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