Hello Hillf, On Mon, Mar 13, 2017 at 02:34:37PM +0800, Hillf Danton wrote: > > On March 13, 2017 8:36 AM Minchan Kim wrote: > > > > If we found lazyfree page is dirty, try_to_unmap_one can just > > SetPageSwapBakced in there like PG_mlocked page and just return > > with SWAP_FAIL which is very natural because the page is not > > swappable right now so that vmscan can activate it. > > There is no point to introduce new return value SWAP_DIRTY > > in ttu at the moment. > > > > Acked-by: Kirill A. Shutemov <kirill.shute...@linux.intel.com> > > Signed-off-by: Minchan Kim <minc...@kernel.org> > > --- > Acked-by: Hillf Danton <hillf...@alibaba-inc.com> > > > include/linux/rmap.h | 1 - > > mm/rmap.c | 6 +++--- > > mm/vmscan.c | 3 --- > > 3 files changed, 3 insertions(+), 7 deletions(-) > > > > diff --git a/include/linux/rmap.h b/include/linux/rmap.h > > index fee10d7..b556eef 100644 > > --- a/include/linux/rmap.h > > +++ b/include/linux/rmap.h > > @@ -298,6 +298,5 @@ static inline int page_mkclean(struct page *page) > > #define SWAP_AGAIN 1 > > #define SWAP_FAIL 2 > > #define SWAP_MLOCK 3 > > -#define SWAP_DIRTY 4 > > > > #endif /* _LINUX_RMAP_H */ > > diff --git a/mm/rmap.c b/mm/rmap.c > > index 9dbfa6f..d47af09 100644 > > --- a/mm/rmap.c > > +++ b/mm/rmap.c > > @@ -1414,7 +1414,7 @@ static int try_to_unmap_one(struct page *page, struct > > vm_area_struct *vma, > > */ > > if (unlikely(PageSwapBacked(page) != > > PageSwapCache(page))) { > > WARN_ON_ONCE(1); > > - ret = SWAP_FAIL; > > + ret = false; > Nit: > Hm looks like stray merge. > Not sure it's really needed.
rebase fail ;-O Thanks!