Huge Page

Ⅰ. Check Huge Page

1. Linux 内核支持多种 page size。

   架构	HugePage Size
   arm64	4K, 2M and 1G (or 64K and 512M if one builds their own kernel with CONFIG_ARM64_64K_PAGES=y)
   x86	4K and 4M (2M in PAE mode，1GB if architecturally supported)
   amd64	2MB, 1GB
   ia64	4K, 8K, 64K, 256K, 1M, 4M, 16M, 256M
   ppc64	4K, 16M