Rick,

On Wed, 16 May 2018, Rick Warner wrote:

> I've attached the dmesg output with the kernel parameter and supplied patch.

Thanks for providing the data. I think I know what's wrong here. Does the
patch below fix your problem?

While you test, I go looking for a big brown paperbag.

Thanks,

        tglx

8<----------------

--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -124,6 +124,7 @@ static void init_x2apic_ldr(void)
                        goto update;
        }
        cmsk = cluster_hotplug_mask;
+       cmsk->clusterid = cluster;
        cluster_hotplug_mask = NULL;
 update:
        this_cpu_write(cluster_masks, cmsk);

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