尽管内核页面不需要进行交换，然而用户页面需要，但是它们可以被固定，通过mlock(或mlockall)函数来锁定页面。
Although kernel pages are not candidates for swapping, user space pages are, but they can be pinned through the mlock (or mlockall) function to lock the page down.
尽管内核页面不需要进行交换，然而用户页面需要，但是它们可以被固定，通过mlock(或mlockall)函数来锁定页面。
Although kernel pages are not candidates for swapping, user space pages are, but they can be pinned through the mlock (or mlockall) function to lock the page down.
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