From: z00281421 <z00281421@xxxxxxxxxxxxxxxxxxxx> more mapcount page as kpage could reduce total replacement times than fewer mapcount one when ksmd scan and replace among forked pages later. Signed-off-by: z00281421 <z00281421@xxxxxxxxxxxxxxxxxxxx> --- mm/ksm.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/mm/ksm.c b/mm/ksm.c index 4786b41..4d530af 100644 --- a/mm/ksm.c +++ b/mm/ksm.c @@ -1094,6 +1094,14 @@ static struct page *try_to_merge_two_pages(struct rmap_item *rmap_item, { int err; + /* + * select more mapcount page as kpage + */ + if (page_mapcount(page) < page_mapcount(tree_page)) { + swap(page, tree_page); + swap(rmap_item, tree_rmap_item); + } + err = try_to_merge_with_ksm_page(rmap_item, page, NULL); if (!err) { err = try_to_merge_with_ksm_page(tree_rmap_item, -- 1.7.9.5 -- 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>