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    SubjectRe: [QUESTION] about the maple tree and current status of mmap_lock scalability
    On Thu, Dec 29, 2022 at 9:10 AM Lorenzo Stoakes <lstoakes@gmail.com> wrote:
    >
    > On Thu, Dec 29, 2022 at 04:51:37PM +0000, Matthew Wilcox wrote:
    > > The mmap_lock is taken for many, many things. [snip]
    >
    > I am currently describing the use of this lock (for 6.0) in the book and it is
    > striking just how broadly it's used. I'm diagramming it out for 'core' users,
    > i.e. non-driver and non-some other things, but even constraining that leaves a
    > HUGE number of users. I've also documented the 'unexpected' uses of the
    > page_table_lock, which seems to have been significantly improved over time but
    > still a few cases remain!
    >
    > Am happy to give you (+ anybody else on MAINTAINERS list) an early copy of the
    > relevant bit (once I've finished the diagrams anyway) if that'd be helpful!

    Yes please, that would be interesting.

    >
    > Now if you guys could stop obsoleting my work that'd be great ;)

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