Re: [PATCH v8 1/2] mm: skip folio reclaim in legacy memcg contexts for deadlockable mappings

[David Hildenbrand <david@xxxxxxxxxx>]

>   			/* Case 1 above */
>   			if (current_is_kswapd() &&
>   			    folio_test_reclaim(folio) &&
> @@ -1201,7 +1205,9 @@ static unsigned int shrink_folio_list(struct list_head *folio_list,
>   			/* Case 2 above */
>   			} else if (writeback_throttling_sane(sc) ||
>   			    !folio_test_reclaim(folio) ||
> -			    !may_enter_fs(folio, sc->gfp_mask)) {
> +			    !may_enter_fs(folio, sc->gfp_mask) ||
> +			    (mapping &&
> +			     mapping_writeback_may_deadlock_on_reclaim(mapping))) {

Nit: Would have put that into a single line (we can exceed 80c where 
reasonable)

Thanks!

Acked-by: David Hildenbrand <david@xxxxxxxxxx>

--
Cheers,

David / dhildenb