thp: make deferred_split_scan() work again

We need to iterate over split_queue, not local empty list to get anything split from the shrinker. Fixes: e3ae195 ("thp: limit number of object to scan on deferred_split_scan()") Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Andrea Arcangeli <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
jljusten · Feb 6, 2016 · ae02620 · ae02620
1 parent 12352d3
commit ae02620
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
@@ -3482,7 +3482,7 @@ static unsigned long deferred_split_scan(struct shrinker *shrink,
 
 	spin_lock_irqsave(&pgdata->split_queue_lock, flags);
 	/* Take pin on all head pages to avoid freeing them under us */
-	list_for_each_safe(pos, next, &list) {
+	list_for_each_safe(pos, next, &pgdata->split_queue) {
 		page = list_entry((void *)pos, struct page, mapping);
 		page = compound_head(page);
 		if (get_page_unless_zero(page)) {