1 files changed, 16 insertions, 4 deletions

diff --git a/mm/compaction.c b/mm/compaction.c
index 9ff71239b1fc..c8bcdea15f5f 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -583,9 +583,10 @@ static unsigned long isolate_freepages_block(struct compact_control *cc,
 		if (PageCompound(page)) {
 			const unsigned int order = compound_order(page);
 
-			if (likely(order < MAX_ORDER)) {
+			if (likely(order <= MAX_ORDER)) {
 				blockpfn += (1UL << order) - 1;
 				cursor += (1UL << order) - 1;
+				nr_scanned += (1UL << order) - 1;
 			}
 			goto isolate_fail;
 		}
@@ -893,6 +894,11 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
 		}
 
 		if (PageHuge(page) && cc->alloc_contig) {
+			if (locked) {
+				unlock_page_lruvec_irqrestore(locked, flags);
+				locked = NULL;
+			}
+
 			ret = isolate_or_dissolve_huge_page(page, &cc->migratepages);
 
 			/*
@@ -904,6 +910,7 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
 				if (ret == -EBUSY)
 					ret = 0;
 				low_pfn += compound_nr(page) - 1;
+				nr_scanned += compound_nr(page) - 1;
 				goto isolate_fail;
 			}
 
@@ -938,8 +945,10 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
 			 * a valid page order. Consider only values in the
 			 * valid order range to prevent low_pfn overflow.
 			 */
-			if (freepage_order > 0 && freepage_order < MAX_ORDER)
+			if (freepage_order > 0 && freepage_order <= MAX_ORDER) {
 				low_pfn += (1UL << freepage_order) - 1;
+				nr_scanned += (1UL << freepage_order) - 1;
+			}
 			continue;
 		}
 
@@ -954,8 +963,10 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
 		if (PageCompound(page) && !cc->alloc_contig) {
 			const unsigned int order = compound_order(page);
 
-			if (likely(order < MAX_ORDER))
+			if (likely(order <= MAX_ORDER)) {
 				low_pfn += (1UL << order) - 1;
+				nr_scanned += (1UL << order) - 1;
+			}
 			goto isolate_fail;
 		}
 
@@ -1077,6 +1088,7 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
 			 */
 			if (unlikely(PageCompound(page) && !cc->alloc_contig)) {
 				low_pfn += compound_nr(page) - 1;
+				nr_scanned += compound_nr(page) - 1;
 				SetPageLRU(page);
 				goto isolate_fail_put;
 			}
@@ -2131,7 +2143,7 @@ static enum compact_result __compact_finished(struct compact_control *cc)
 
 	/* Direct compactor: Is a suitable page free? */
 	ret = COMPACT_NO_SUITABLE_PAGE;
-	for (order = cc->order; order < MAX_ORDER; order++) {
+	for (order = cc->order; order <= MAX_ORDER; order++) {
 		struct free_area *area = &cc->zone->free_area[order];
 		bool can_steal;