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-rw-r--r--mm/compaction.c20
1 files changed, 9 insertions, 11 deletions
diff --git a/mm/compaction.c b/mm/compaction.c
index 017a1a1963cb..329973a1ae45 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -787,6 +787,15 @@ isolate_success:
cc->nr_migratepages++;
nr_isolated++;
+ /*
+ * Record where we could have freed pages by migration and not
+ * yet flushed them to buddy allocator.
+ * - this is the lowest page that was isolated and likely be
+ * then freed by migration.
+ */
+ if (!cc->last_migrated_pfn)
+ cc->last_migrated_pfn = low_pfn;
+
/* Avoid isolating too much */
if (cc->nr_migratepages == COMPACT_CLUSTER_MAX) {
++low_pfn;
@@ -1075,7 +1084,6 @@ static isolate_migrate_t isolate_migratepages(struct zone *zone,
unsigned long block_start_pfn;
unsigned long block_end_pfn;
unsigned long low_pfn;
- unsigned long isolate_start_pfn;
struct page *page;
const isolate_mode_t isolate_mode =
(sysctl_compact_unevictable_allowed ? ISOLATE_UNEVICTABLE : 0) |
@@ -1130,7 +1138,6 @@ static isolate_migrate_t isolate_migratepages(struct zone *zone,
continue;
/* Perform the isolation */
- isolate_start_pfn = low_pfn;
low_pfn = isolate_migratepages_block(cc, low_pfn,
block_end_pfn, isolate_mode);
@@ -1140,15 +1147,6 @@ static isolate_migrate_t isolate_migratepages(struct zone *zone,
}
/*
- * Record where we could have freed pages by migration and not
- * yet flushed them to buddy allocator.
- * - this is the lowest page that could have been isolated and
- * then freed by migration.
- */
- if (cc->nr_migratepages && !cc->last_migrated_pfn)
- cc->last_migrated_pfn = isolate_start_pfn;
-
- /*
* Either we isolated something and proceed with migration. Or
* we failed and compact_zone should decide if we should
* continue or not.