On Tue, Apr 05, 2016 at 02:12:26PM -0700, Hugh Dickins wrote: > ShmemFreeHoles will show the wastage from using huge pages for small, or > sparsely occupied, or unrounded files: wastage not included in Shmem or > MemFree, but will be freed under memory pressure. (But no count for the > partially occupied portions of huge pages: seems less important, but > could be added.) And here first difference in interfaces comes: I don't have an equivalent in my implementation, as I don't track such information. It looks like an implementation detail for team-pages based huge tmpfs. We don't track anything similar for anon-THP. > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -3830,6 +3830,11 @@ out: > } > > #define K(x) ((x) << (PAGE_SHIFT-10)) > +#ifdef CONFIG_TRANSPARENT_HUGEPAGE > +#define THPAGE_PMD_NR HPAGE_PMD_NR > +#else > +#define THPAGE_PMD_NR 0 /* Avoid BUILD_BUG() */ > +#endif I've just put THP-related counters on separate line and wrap it into #ifdef. -- Kirill A. Shutemov -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>