tlb gather mmu()函数有何用？

Question

tlb gather mmu() records the MM that is being altered. Later,
tlb remove page() will be called to unmap the PTE that stores the PTEs in
a struct free pte ctx until the zapping is finished. This is to avoid having
to constantly flush the TLB as PTEs are freed。
以上是在《Understanding the Linux®
Virtual Memory Manager》中摘过来的。烦劳大家给解释一下！

Answer 1