#include <linux/backing-dev.h>
#include <linux/sysctl.h>
#include <linux/sysfs.h>
+#include <linux/balloon_compaction.h>
#include "internal.h"
#if defined CONFIG_COMPACTION || defined CONFIG_CMA
goto next_pageblock;
}
- /* Check may be lockless but that's ok as we recheck later */
- if (!PageLRU(page))
+ /*
+ * Check may be lockless but that's ok as we recheck later.
+ * It's possible to migrate LRU pages and balloon pages
+ * Skip any other type of page
+ */
+ if (!PageLRU(page)) {
+ if (unlikely(balloon_page_movable(page))) {
+ if (locked && balloon_page_isolate(page)) {
+ /* Successfully isolated */
+ cc->finished_update_migrate = true;
+ list_add(&page->lru, migratelist);
+ cc->nr_migratepages++;
+ nr_isolated++;
+ goto check_compact_cluster;
+ }
+ }
continue;
+ }
/*
* PageLRU is set. lru_lock normally excludes isolation
cc->nr_migratepages++;
nr_isolated++;
+check_compact_cluster:
/* Avoid isolating too much */
if (cc->nr_migratepages == COMPACT_CLUSTER_MAX) {
++low_pfn;