Now MADV_FREE pages can be easily reclaimed even for swapless system. We can safely enable MADV_FREE for all systems.
Cc: Michal Hocko <[email protected]> Cc: Minchan Kim <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Andrew Morton <[email protected]> Acked-by: Johannes Weiner <[email protected]> Signed-off-by: Shaohua Li <[email protected]> --- mm/madvise.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/mm/madvise.c b/mm/madvise.c index 225af7d..5ab4b7b 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -612,13 +612,7 @@ madvise_vma(struct vm_area_struct *vma, struct vm_area_struct **prev, case MADV_WILLNEED: return madvise_willneed(vma, prev, start, end); case MADV_FREE: - /* - * XXX: In this implementation, MADV_FREE works like - * MADV_DONTNEED on swapless system or full swap. - */ - if (get_nr_swap_pages() > 0) - return madvise_free(vma, prev, start, end); - /* passthrough */ + return madvise_free(vma, prev, start, end); case MADV_DONTNEED: return madvise_dontneed(vma, prev, start, end); default: -- 2.9.3
