On 2/24/26 06:49, Baolin Wang wrote:

On 2/24/26 10:38 AM, Rik van Riel wrote:

quoted

On Tue, 2026-02-24 at 09:56 +0800, Baolin Wang wrote:

quoted

diff --git a/mm/rmap.c b/mm/rmap.c
index bff8f222004e..be785dfc9336 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c

@@ -1065,6 +1065,7 @@ int folio_referenced(struct folio *folio, int

is_locked,
          .invalid_vma = invalid_folio_referenced_vma,
      };
  +    VM_WARN_ON_FOLIO(folio_is_zone_device(folio), folio);
      *vm_flags = 0;
      if (!pra.mapcount)
          return 0;

Should be a VM_WARN_ON_ONCE_FOLIO so we do not cause
a softlockup if we try to print information about a
million ZONE_DEVICE pages?

Yes, sounds reasonable. Will do in next version. Thanks for reviewing.

Feel free to add my

Acked-by: David Hildenbrand (Arm) <david@kernel.org>

to that.

-- 
Cheers,

David