| Subject | Re: [PATCH v4 06/36] mm: Introduce offset_in_thp | From | David Hildenbrand <> | Date | Fri, 15 May 2020 15:39:42 +0200 |
| |
On 15.05.20 15:16, Matthew Wilcox wrote: > From: "Matthew Wilcox (Oracle)" <willy@infradead.org> > > Mirroring offset_in_page(), this gives you the offset within this > particular page, no matter what size page it is. It optimises down > to offset_in_page() if CONFIG_TRANSPARENT_HUGEPAGE is not set. > > Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> > --- > include/linux/mm.h | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/include/linux/mm.h b/include/linux/mm.h > index 088acbda722d..9a55dce6a535 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -1577,6 +1577,7 @@ static inline void clear_page_pfmemalloc(struct page *page) > extern void pagefault_out_of_memory(void); > > #define offset_in_page(p) ((unsigned long)(p) & ~PAGE_MASK) > +#define offset_in_thp(page, p) ((unsigned long)(p) & (thp_size(page) - 1)) > > /* > * Flags passed to show_mem() and show_free_areas() to suppress output in >
Reviewed-by: David Hildenbrand <david@redhat.com>
-- Thanks,
David / dhildenb
|