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-rw-r--r--mm/migrate.c23
1 files changed, 17 insertions, 6 deletions
diff --git a/mm/migrate.c b/mm/migrate.c
index eae1565285e3..86873b6f38a7 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1512,9 +1512,11 @@ static int do_move_pages_to_node(struct mm_struct *mm,
/*
* Resolves the given address to a struct page, isolates it from the LRU and
* puts it to the given pagelist.
- * Returns -errno if the page cannot be found/isolated or 0 when it has been
- * queued or the page doesn't need to be migrated because it is already on
- * the target node
+ * Returns:
+ * errno - if the page cannot be found/isolated
+ * 0 - when it doesn't have to be migrated because it is already on the
+ * target node
+ * 1 - when it has been queued
*/
static int add_page_for_migration(struct mm_struct *mm, unsigned long addr,
int node, struct list_head *pagelist, bool migrate_all)
@@ -1553,7 +1555,7 @@ static int add_page_for_migration(struct mm_struct *mm, unsigned long addr,
if (PageHuge(page)) {
if (PageHead(page)) {
isolate_huge_page(page, pagelist);
- err = 0;
+ err = 1;
}
} else {
struct page *head;
@@ -1563,7 +1565,7 @@ static int add_page_for_migration(struct mm_struct *mm, unsigned long addr,
if (err)
goto out_putpage;
- err = 0;
+ err = 1;
list_add_tail(&head->lru, pagelist);
mod_node_page_state(page_pgdat(head),
NR_ISOLATED_ANON + page_is_file_cache(head),
@@ -1640,8 +1642,17 @@ static int do_pages_move(struct mm_struct *mm, nodemask_t task_nodes,
*/
err = add_page_for_migration(mm, addr, current_node,
&pagelist, flags & MPOL_MF_MOVE_ALL);
- if (!err)
+
+ if (!err) {
+ /* The page is already on the target node */
+ err = store_status(status, i, current_node, 1);
+ if (err)
+ goto out_flush;
continue;
+ } else if (err > 0) {
+ /* The page is successfully queued for migration */
+ continue;
+ }
err = store_status(status, i, err, 1);
if (err)