[PATCH v5 5/5] mm: rmap: support batched unmapping for file large folios

[Lorenzo Stoakes]

On Fri, Jan 16, 2026 at 03:23:02PM +0530, Dev Jain wrote:
> I am of the opinion that we should do something like this. In the internal pvmw code,
> we keep skipping ptes till the ptes are none. With my proposed uffd-fix [1], if the old
> ptes were uffd-wp armed, pte_install_uffd_wp_if_needed will convert all ptes from none
> to not none, and we will lose the batching effect. I also plan to extend support to
> anonymous folios (therefore generalizing for all types of memory) which will set a
> batch of ptes as swap, and the internal pvmw code won't be able to skip through the
> batch.
>
>
> [1] https://lore.kernel.org/linux-mm/20260116082721.275178-1-dev.jain@arm.com/

No, as I told you, the correct course is to make your suggestion here with
perhaps a suggested fix-patch, please let's not split the discussion
between _the actual series where the issue exists_ and an invalid patch
report, it makes it _super hard_ to track what on earth is going on here.

Now anybody responding will be inclined to reply there and it's a total
mess...

Thanks, Lorenzo