diff options
Diffstat (limited to 'mm/compaction.c')
| -rw-r--r-- | mm/compaction.c | 20 |
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. |