Re: [PATCH v4 1/6] mm: enable page walking API to lock vmas during the walk

[Andrew Morton]

On Fri,  4 Aug 2023 08:27:19 -0700 Suren Baghdasaryan <surenb@xxxxxxxxxx> wrote:

> walk_page_range() and friends often operate under write-locked mmap_lock.
> With introduction of vma locks, the vmas have to be locked as well
> during such walks to prevent concurrent page faults in these areas.
> Add an additional member to mm_walk_ops to indicate locking requirements
> for the walk.
> 
> ...
>
>  18 files changed, 100 insertions(+), 20 deletions(-)
> 

That's a big patch for a -stable backport.

Presumably the various -stable maintainers will be wondering why we're
doing this.  But, as is so often the case, the changelog fails to
describe any user-visible effects of the change.  Please send this info
and I'll add it to the changelog.