Some architectures may want to support 512G HugeTLB pages in the future. Adjust COMPOUND_MAPPED to support this page size. Signed-off-by: James Houghton <jthoughton@xxxxxxxxxx> diff --git a/mm/internal.h b/mm/internal.h index 400451a4dd49..994381fd5155 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -53,11 +53,11 @@ struct folio_batch; void page_writeback_init(void); /* - * If a 16GB hugetlb folio were mapped by PTEs of all of its 4kB pages, - * its nr_pages_mapped would be 0x400000: choose the COMPOUND_MAPPED bit - * above that range, instead of 2*(PMD_SIZE/PAGE_SIZE). + * If a 512G hugetlb folio were mapped by PTEs of all of its 4kB pages, + * its nr_pages_mapped would be 2^27 (0x8000000): choose the COMPOUND_MAPPED bit + * above that range. */ -#define COMPOUND_MAPPED 0x800000 +#define COMPOUND_MAPPED (1 << 28) #define FOLIO_PAGES_MAPPED (COMPOUND_MAPPED - 1) /* -- 2.40.0.rc0.216.gc4246ad0f0-goog
