Re: [PATCH v5 6/6] mm: handle userfaults under VMA lock

Peter Xu
2023-06-28T17:33:03Z

On Wed, Jun 28, 2023 at 10:25:29AM -0700, Suren Baghdasaryan wrote:
> Enable handle_userfault to operate under VMA lock by releasing VMA lock
> instead of mmap_lock and retrying. Note that FAULT_FLAG_RETRY_NOWAIT
> should never be used when handling faults under per-VMA lock protection
> because that would break the assumption that lock is dropped on retry.
>
> Signed-off-by: Suren Baghdasaryan <surenb@google.com>

Maybe the sanitize_fault_flags() changes suite more in patch 3, but not a
big deal I guess.

Acked-by: Peter Xu <peterx@redhat.com>

Thanks!

--
Peter Xu