X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=mm%2Fpage_isolation.c;h=f2f5b4818e948bd1436cc730757f6c90749885ef;hb=8befedfe678ff84d5bc356be4f3cb1fd84959d02;hp=3ca1716471bc5af48fef3560863b2c9e6bd15d60;hpb=2139cbe627b8910ded55148f87ee10f7485408ed;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index 3ca1716..f2f5b48 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -77,11 +77,12 @@ int set_migratetype_isolate(struct page *page)
 out:
 	if (!ret) {
 		unsigned long nr_pages;
+		int migratetype = get_pageblock_migratetype(page);
 
 		set_pageblock_isolate(page);
 		nr_pages = move_freepages_block(zone, page, MIGRATE_ISOLATE);
 
-		__mod_zone_page_state(zone, NR_FREE_PAGES, -nr_pages);
+		__mod_zone_freepage_state(zone, -nr_pages, migratetype);
 	}
 
 	spin_unlock_irqrestore(&zone->lock, flags);
@@ -100,7 +101,7 @@ void unset_migratetype_isolate(struct page *page, unsigned migratetype)
 	if (get_pageblock_migratetype(page) != MIGRATE_ISOLATE)
 		goto out;
 	nr_pages = move_freepages_block(zone, page, migratetype);
-	__mod_zone_page_state(zone, NR_FREE_PAGES, nr_pages);
+	__mod_zone_freepage_state(zone, nr_pages, migratetype);
 	restore_pageblock_isolate(page, migratetype);
 out:
 	spin_unlock_irqrestore(&zone->lock, flags);
@@ -199,10 +200,25 @@ __test_page_isolated_in_pageblock(unsigned long pfn, unsigned long end_pfn)
 			continue;
 		}
 		page = pfn_to_page(pfn);
-		if (PageBuddy(page))
+		if (PageBuddy(page)) {
+			/*
+			 * If race between isolatation and allocation happens,
+			 * some free pages could be in MIGRATE_MOVABLE list
+			 * although pageblock's migratation type of the page
+			 * is MIGRATE_ISOLATE. Catch it and move the page into
+			 * MIGRATE_ISOLATE list.
+			 */
+			if (get_freepage_migratetype(page) != MIGRATE_ISOLATE) {
+				struct page *end_page;
+
+				end_page = page + (1 << page_order(page)) - 1;
+				move_freepages(page_zone(page), page, end_page,
+						MIGRATE_ISOLATE);
+			}
 			pfn += 1 << page_order(page);
+		}
 		else if (page_count(page) == 0 &&
-				page_private(page) == MIGRATE_ISOLATE)
+			get_freepage_migratetype(page) == MIGRATE_ISOLATE)
 			pfn += 1;
 		else
 			break;
@@ -239,3 +255,14 @@ int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn)
 	spin_unlock_irqrestore(&zone->lock, flags);
 	return ret ? 0 : -EBUSY;
 }
+
+struct page *alloc_migrate_target(struct page *page, unsigned long private,
+				  int **resultp)
+{
+	gfp_t gfp_mask = GFP_USER | __GFP_MOVABLE;
+
+	if (PageHighMem(page))
+		gfp_mask |= __GFP_HIGHMEM;
+
+	return alloc_page(gfp_mask);
+}