Ubuntu
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  1. Bug #2028158
  2. Comment #6

Comment 6 for bug 2028158

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Gnanendra Kolla (gnanendrakollaa) 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.

Hello Michael,

Duplicate 'hmem' (dax) devices creation is fixed in provided test kernel.

When reconfiguring dax devices then we are seeing below auto onlines hot plugged memory error seen.

root@ubuntu:/home/ubuntu# daxctl reconfigure-device -m system-ram dax0.0 -u
dax0.0: error: kernel policy will auto-online memory, aborting.
error reconfiguring devices: Device or resource busy
reconfigured 0 devices.

# grep ONLINE /boot/config-$(uname -r)
CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE=y