11.2. Parameters for reserving HugeTLB pages at boot time

Use the following parameters to influence HugeTLB page behavior at boot time.

For more information about how to use these parameters to configure HugeTLB pages at boot time, see Configuring HugeTLB at boot time.

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表11.1 Parameters used to configure HugeTLB pages at boot time
Parameter	Description	Default value
`hugepages`	Defines the number of persistent huge pages configured in the kernel at boot time. In a NUMA system, huge pages, that have this parameter defined, are divided equally between nodes. You can assign huge pages to specific nodes at runtime by changing the value of the nodes in the `/sys/devices/system/node/node_id/hugepages/hugepages-size/nr_hugepages` file.	The default value is `0`. To update this value at boot, change the value of this parameter in the `/proc/sys/vm/nr_hugepages` file.
`hugepagesz`	Defines the size of persistent huge pages configured in the kernel at boot time.	Valid values are `2 MB` and `1 GB`. The default value is `2 MB`.
`default_hugepagesz`	Defines the default size of persistent huge pages configured in the kernel at boot time.	Valid values are `2 MB` and `1 GB`. The default value is `2 MB`.