summaryrefslogtreecommitdiffstats
path: root/mm/compaction.c
diff options
context:
space:
mode:
Diffstat (limited to 'mm/compaction.c')
-rw-r--r--mm/compaction.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/compaction.c b/mm/compaction.c
index a18201a..570426e 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1047,6 +1047,12 @@ typedef enum {
} isolate_migrate_t;
/*
+ * Allow userspace to control policy on scanning the unevictable LRU for
+ * compactable pages.
+ */
+int sysctl_compact_unevictable_allowed __read_mostly = 1;
+
+/*
* Isolate all pages that can be migrated from the first suitable block,
* starting at the block pointed to by the migrate scanner pfn within
* compact_control.
@@ -1057,6 +1063,7 @@ static isolate_migrate_t isolate_migratepages(struct zone *zone,
unsigned long low_pfn, end_pfn;
struct page *page;
const isolate_mode_t isolate_mode =
+ (sysctl_compact_unevictable_allowed ? ISOLATE_UNEVICTABLE : 0) |
(cc->mode == MIGRATE_ASYNC ? ISOLATE_ASYNC_MIGRATE : 0);
/*
OpenPOWER on IntegriCloud