Unless I am missing something, this is not based on the Maple tree
rewrite, right? Does the change in the data structure makes any
difference to the approach? I remember discussions at LSFMM where it has
been pointed out that some issues with the vma tree are considerably
simpler to handle with the maple tree.

On Thu 01-09-22 10:34:48, Suren Baghdasaryan wrote:
[...]

One notable way the implementation deviates from the proposal is the way
VMAs are marked as locked. Because during some of mm updates multiple
VMAs need to be locked until the end of the update (e.g. vma_merge,
split_vma, etc).

I think it would be really helpful to spell out those issues in a greater
detail. Not everybody is aware of those vma related subtleties.

Thanks for working on this Suren!
-- 
Michal Hocko
SUSE Labs