diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mmzone.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 4c481ec77da9..0bef68e41f19 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -92,6 +92,17 @@ #define MAX_FOLIO_NR_PAGES (1UL << MAX_FOLIO_ORDER) +/* + * HugeTLB Vmemmap Optimization (HVO) requires struct pages of the head page to + * be naturally aligned with regard to the folio size. + * + * HVO which is only active if the size of struct page is a power of 2. + */ +#define MAX_FOLIO_VMEMMAP_ALIGN \ + (IS_ENABLED(CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP) && \ + is_power_of_2(sizeof(struct page)) ? \ + MAX_FOLIO_NR_PAGES * sizeof(struct page) : 0) + enum migratetype { MIGRATE_UNMOVABLE, MIGRATE_MOVABLE, |