不过，对于那些在大量进程在运行的系统来说，将页表存储到高端内存中可以在低端内存区域挤出更多的内存。
However, for systems in which a large number of processes are running, storing page tables in high memory can be enabled to squeeze more memory out of the low memory area.
作为代价，使用这些页表条目的进程会稍微慢一些。
In exchange, the process of using these page-table entries is somewhat slower.
在这种情况下，每个映射到同一块1 GB内存的进程将为页表条目付出自己2 MB的代价。
In such a situation, every process mapping that same 1 GB of memory would consume its own 2 MB worth of page-table entries.
应用推荐