Messages in this thread Patch in this message | | | From | "Matthew Wilcox (Oracle)" <> | Subject | [PATCH 07/12] mm: Make large folios depend on THP | Date | Sun, 16 Jan 2022 12:18:17 +0000 |
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Some parts of the VM still depend on THP to handle large folios correctly. Until those are fixed, prevent creating large folios if THP are disabled.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> --- include/linux/pagemap.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 877dabed0316..3e348e0a9e4e 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -192,9 +192,14 @@ static inline void mapping_set_large_folios(struct address_space *mapping) __set_bit(AS_LARGE_FOLIO_SUPPORT, &mapping->flags); } +/* + * Large folio support currently depends on THP. These dependencies are + * being worked on but are not yet fixed. + */ static inline bool mapping_large_folio_support(struct address_space *mapping) { - return test_bit(AS_LARGE_FOLIO_SUPPORT, &mapping->flags); + return IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) && + test_bit(AS_LARGE_FOLIO_SUPPORT, &mapping->flags); } static inline int filemap_nr_thps(struct address_space *mapping) -- 2.34.1
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