diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/rmap.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/rmap.h b/include/linux/rmap.h index fd6fe16fa358..b7944a833668 100644 --- a/include/linux/rmap.h +++ b/include/linux/rmap.h @@ -199,8 +199,15 @@ static inline void __folio_rmap_sanity_checks(struct folio *folio, { /* hugetlb folios are handled separately. */ VM_WARN_ON_FOLIO(folio_test_hugetlb(folio), folio); - VM_WARN_ON_FOLIO(folio_test_large(folio) && - !folio_test_large_rmappable(folio), folio); + + /* + * TODO: we get driver-allocated folios that have nothing to do with + * the rmap using vm_insert_page(); therefore, we cannot assume that + * folio_test_large_rmappable() holds for large folios. We should + * handle any desired mapcount+stats accounting for these folios in + * VM_MIXEDMAP VMAs separately, and then sanity-check here that + * we really only get rmappable folios. + */ VM_WARN_ON_ONCE(nr_pages <= 0); VM_WARN_ON_FOLIO(page_folio(page) != folio, folio); |