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-rw-r--r--mm/migrate.c29
1 files changed, 9 insertions, 20 deletions
diff --git a/mm/migrate.c b/mm/migrate.c
index 13bedcc..8a73d66 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -72,28 +72,12 @@ int migrate_prep_local(void)
}
/*
- * Add isolated pages on the list back to the LRU under page lock
- * to avoid leaking evictable pages back onto unevictable list.
- */
-void putback_lru_pages(struct list_head *l)
-{
- struct page *page;
- struct page *page2;
-
- list_for_each_entry_safe(page, page2, l, lru) {
- list_del(&page->lru);
- dec_zone_page_state(page, NR_ISOLATED_ANON +
- page_is_file_cache(page));
- putback_lru_page(page);
- }
-}
-
-/*
* Put previously isolated pages back onto the appropriate lists
* from where they were once taken off for compaction/migration.
*
- * This function shall be used instead of putback_lru_pages(),
- * whenever the isolated pageset has been built by isolate_migratepages_range()
+ * This function shall be used whenever the isolated pageset has been
+ * built from lru, balloon, hugetlbfs page. See isolate_migratepages_range()
+ * and isolate_huge_page().
*/
void putback_movable_pages(struct list_head *l)
{
@@ -1725,7 +1709,12 @@ int migrate_misplaced_page(struct page *page, struct vm_area_struct *vma,
nr_remaining = migrate_pages(&migratepages, alloc_misplaced_dst_page,
node, MIGRATE_ASYNC, MR_NUMA_MISPLACED);
if (nr_remaining) {
- putback_lru_pages(&migratepages);
+ if (!list_empty(&migratepages)) {
+ list_del(&page->lru);
+ dec_zone_page_state(page, NR_ISOLATED_ANON +
+ page_is_file_cache(page));
+ putback_lru_page(page);
+ }
isolated = 0;
} else
count_vm_numa_event(NUMA_PAGE_MIGRATE);
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