diff options
Diffstat (limited to 'mm/rmap.c')
| -rw-r--r-- | mm/rmap.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index 92eeb3866494..ac4f783d6ec2 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1463,12 +1463,12 @@ static __always_inline void __folio_add_anon_rmap(struct folio *folio, } /* - * For large folio, only mlock it if it's fully mapped to VMA. It's - * not easy to check whether the large folio is fully mapped to VMA - * here. Only mlock normal 4K folio and leave page reclaim to handle - * large folio. + * Only mlock it if the folio is fully mapped to the VMA. + * + * Partially mapped folios can be split on reclaim and part outside + * of mlocked VMA can be evicted or freed. */ - if (!folio_test_large(folio)) + if (folio_nr_pages(folio) == nr_pages) mlock_vma_folio(folio, vma); } @@ -1601,8 +1601,13 @@ static __always_inline void __folio_add_file_rmap(struct folio *folio, __folio_add_rmap(folio, page, nr_pages, vma, level); - /* See comments in folio_add_anon_rmap_*() */ - if (!folio_test_large(folio)) + /* + * Only mlock it if the folio is fully mapped to the VMA. + * + * Partially mapped folios can be split on reclaim and part outside + * of mlocked VMA can be evicted or freed. + */ + if (folio_nr_pages(folio) == nr_pages) mlock_vma_folio(folio, vma); } |