On Tue, 2022-03-29 at 19:13 +0000, Song Liu wrote: > > > > I don't think we should tie this to vmap_allow_huge by definition. > > Also, what it does is try 2MB pages for allocations larger than > > 2MB. > > For smaller allocations it doesn't try or "prefer" them. > > How about something like: > > #define VM_TRY_HUGE_VMAP 0x00001000 /* try PMD_SIZE > mapping if size-per-node >= PMD_SIZE */ Seems reasonable name. I don't know if "size-per-node >= PMD_SIZE" is going to be useful information. Maybe something like: /* Allow for huge pages on HAVE_ARCH_HUGE_VMALLOC_FLAG arch's */
