The first is simply enabling the multiple page size support.
第一个参数启用多种页面大小支持。
Improved multiple page size support: As discussed earlier in the Tuning section, there are now four different page sizes available. These sizes come in the following flavors.
改进的多种页面大小支持：正如前面在优化部分中所介绍的，现在有四种不同的页面大小可供使用。
With the multiple page size support enabled, the vmm_default_pspa parameter controls how many sequential pages are required for the smaller 4KB pages to be promoted to the 64KB page size.
在启用多种页面大小支持的情况下，vmm_default_pspa 参数控制提升为 64KB 页面需要多少个连续的 4KB 页面。
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