Re: [PATCH 3/4] mm: replace rw_semaphore with atomic_t in vma_lock

[Peter Zijlstra <peterz@xxxxxxxxxxxxx>]

On Thu, Dec 12, 2024 at 08:48:52PM -0800, Suren Baghdasaryan wrote:

> I'm not sure if this is the best way to deal with this circular
> dependency. Any other ideas?

Move the waiting into an out-of-line slow-path?

  if (atomic_read(&vma->refcnt) != 2)
    __vma_write_start_wait(mm, vma);

or somesuch..