Re: [RFC PATCH 2/3] mm: drop stale folio_ref_count()==1 check in do_swap_page reuse logic

[Shakeel Butt]

On Thu, Jun 11, 2026 at 06:51:23PM +0800, Barry Song (Xiaomi) wrote:
> The "we just allocated them without exposing them to the swapcache"
> case no longer exists, as Kairui has routed synchronous I/O through
> the swapcache as well in his series "unify swapin use swap cache and
> cleanup flags"[1]. As a result, folio_ref_count() should never be 1
> in this path, since at least two references are held (base ref plus
> swapcache). Remove the folio_ref_count()==1 check and update the
> comment accordingly.
> 
> [1] https://lore.kernel.org/all/20251220-swap-table-p2-v5-0-8862a265a033@xxxxxxxxxxx/
> Signed-off-by: Barry Song (Xiaomi) <baohua@xxxxxxxxxx>

Acked-by: Shakeel Butt <shakeel.butt@xxxxxxxxx>