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how hugepages settings are configured via Fuel?

I can see hugepages values are configured in /etc/default/grub after openstack deployment in compute nodes. I am looking to understand how Fuel is pushing this data and configuring hugepages in these nodes.

how hugepages settings are configured via Fuel?

I can see hugepages values are configured in /etc/default/grub after openstack deployment in compute nodes. I am looking to understand how Fuel is pushing this data and configuring hugepages in these nodes.

Is it just changing the /etc/default/grub configuration file and rebooting the node? Or is it passing hugepages values through grub at the time of node booting?