Comment 7 for bug 2028158

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Michael Reed (mreed8855) wrote : Re: Observed device_dax related probe errors in dmesg when HBM CPU is set to flat mode and creating duplicate device_dax ids and hence probe is failing.

I have created a new test kernel with the CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE disabled:

https://people.canonical.com/~mreed/dell/lp_2028158_device_dax/2nd/