[PATCH 4/4] mm: remove direct calling of migration

Gioh Kim
Mon, 13 Jul 2015 08:35:19 -0000

From: Gioh Kim <gurugio at hanmail.net>

Migration is completely generalized so that migrating mobile page
is processed with lru-pages in move_to_new_page.

Signed-off-by: Gioh Kim <gioh.kim at lge.com>
Acked-by: Rafael Aquini <aquini at redhat.com>
---
 mm/migrate.c | 15 ---------------
 1 file changed, 15 deletions(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index 53f0081d..e6644ac 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -844,21 +844,6 @@ static int __unmap_and_move(struct page *page, struct page
*newpage,
 		}
 	}

-	if (unlikely(mobile_page(page))) {
-		/*
-		 * A mobile page does not need any special attention from
-		 * physical to virtual reverse mapping procedures.
-		 * Skip any attempt to unmap PTEs or to remap swap cache,
-		 * in order to avoid burning cycles at rmap level, and perform
-		 * the page migration right away (proteced by page lock).
-		 */
-		lock_page(newpage);
-		rc = page->mapping->a_ops->migratepage(page->mapping,
-						       newpage, page, mode);
-		unlock_page(newpage);
-		goto out_unlock;
-	}
-
 	/*
 	 * Corner case handling:
 	 * 1. When a new swap-cache page is read into, it is added to the LRU
--
2.1.4