Re: [PATCH v8 0/8] mm/hmm: Add mmap lock-drop support for userfaultfd-backed mappings

[Andrew Morton]

On Fri, 10 Jul 2026 14:26:20 -0700 Stanislav Kinsburskii <skinsburskii@xxxxxxxxx> wrote:

> This series extends the HMM framework to support userfaultfd-backed memory
> by allowing the mmap read lock to be dropped during hmm_range_fault().

Thanks.  This seems fairly mature and mostly-reviewed so I'll give it a
spin in mm.git's mm-new branch.

Unfortunately Sashiko wasn't able to apply this or v7.  I'm not sure
what base you were using.  Hopefully there's a reason for a v9 so we
can retry this.

I have a few niggles, nothing major...