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    SubjectRe: [PATCH 3/3] mm/mmap.c: extract __vma_unlink_list as counter part for __vma_link_list
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    On 8/14/19 8:57 AM, Wei Yang wrote:
    > On Tue, Aug 13, 2019 at 10:16:11PM -0700, Christoph Hellwig wrote:
    >>Btw, is there any good reason we don't use a list_head for vma linkage?
    >
    > Not sure, maybe there is some historical reason?

    Seems it was single-linked until 2010 commit 297c5eee3724 ("mm: make the vma
    list be doubly linked") and I guess it was just simpler to add the vm_prev link.

    Conversion to list_head might be an interesting project for some "advanced
    beginner" in the kernel :)

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