[..] > @@ -2836,7 +2844,12 @@ void deferred_split_folio(struct folio *folio) > #endif > unsigned long flags; > > - VM_BUG_ON_FOLIO(folio_order(folio) < 2, folio); > + /* > + * Order 1 folios have no space for a deferred list, but we also > + * won't waste much memory by not adding them to the deferred list. > + */ > + if (folio_order(folio) <= 1) > + return; Would it be clearer if we have a folio_has_deferred_list() helper that has the check and the comment, instead of having this comment here and commentless checks elsewhere (or repeating the comment)?
