Hi Austin,

 

According to (Storyboard) 2004763, I know that you’re working on the feature “Huge page management”.

 

I’ve some questions about the feature.
Though one of its 2 tasks is still in Review (the other is shown merged), you might now have the answers already.

 

In the description of the Story, there are requirement:

“- Enable k8s huge page feature for worker nodes that do not have the openstack compute label. It should be disabled otherwise.”

 

Questions: what is this meaning to users?

By ‘Enable’, is it meaning users can modify memory allocation on the node? (via the following):
system host-modify <worker-name> [-2M <2M hugepages number>] [-1G <1G hugepages number>] [-f <function>] …
or Horizon: Admin -> Platform -> Host Inventory …

Otherwise (‘disabled’), the CLIs (system host-memory-xxx) will reject any requests?
Or the corresponding Horizon pages do not have any items to update the memory application? Or those were disabled?

 

“- Automatically defaults for worker nodes with openstack compute label. Changes will be applied on the unlock.

    - Current 2M huge page default settings

    - 1-1G huge page per numa node for vswitch “

 

Questions: in this situation, is the k8s huge page feature disabled (according to the above requirement)?
               
And the (host-memory) CLIs will reject any requests?

 

 

And a question related with VMs:

If a VM using huge page (with flavor having ‘hw:mem_page_size=large’ or ‘hw:mem_page_size=1048576’) is  launched,  will the free memory pages decreased accordingly on the worker it’s running on?

That is, if the VM is consuming 1G huge-page, the number of free page of 1G size on the hosting worker should be reduced by 1. Is this still the expected behavior?

 

This is the assumption in https://bugs.launchpad.net/starlingx/+bug/1813325.

 

Regards,

Marvin