1 files changed, 56 insertions, 0 deletions

diff --git a/mm/vmscan.c b/mm/vmscan.c
index d8bbaf068c35..e5d52d6a24af 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2145,6 +2145,62 @@ static void shrink_active_list(unsigned long nr_to_scan,
                         nr_deactivate, nr_rotated, sc->priority, file);
 }
 
+unsigned long reclaim_pages(struct list_head *page_list)
+{
+        int nid = -1;
+        unsigned long nr_reclaimed = 0;
+        LIST_HEAD(node_page_list);
+        struct reclaim_stat dummy_stat;
+        struct page *page;
+        struct scan_control sc = {
+                .gfp_mask = GFP_KERNEL,
+                .priority = DEF_PRIORITY,
+                .may_writepage = 1,
+                .may_unmap = 1,
+                .may_swap = 1,
+        };
+
+        while (!list_empty(page_list)) {
+                page = lru_to_page(page_list);
+                if (nid == -1) {
+                        nid = page_to_nid(page);
+                        INIT_LIST_HEAD(&node_page_list);
+                }
+
+                if (nid == page_to_nid(page)) {
+                        ClearPageActive(page);
+                        list_move(&page->lru, &node_page_list);
+                        continue;
+                }
+
+                nr_reclaimed += shrink_page_list(&node_page_list,
+                                                NODE_DATA(nid),
+                                                &sc, 0,
+                                                &dummy_stat, false);
+                while (!list_empty(&node_page_list)) {
+                        page = lru_to_page(&node_page_list);
+                        list_del(&page->lru);
+                        putback_lru_page(page);
+                }
+
+                nid = -1;
+        }
+
+        if (!list_empty(&node_page_list)) {
+                nr_reclaimed += shrink_page_list(&node_page_list,
+                                                NODE_DATA(nid),
+                                                &sc, 0,
+                                                &dummy_stat, false);
+                while (!list_empty(&node_page_list)) {
+                        page = lru_to_page(&node_page_list);
+                        list_del(&page->lru);
+                        putback_lru_page(page);
+                }
+        }
+
+        return nr_reclaimed;
+}
+
 /*
  * The inactive anon list should be small enough that the VM never has
  * to do too much work.