1 files changed, 6 insertions, 1 deletions

diff --git a/mm/migrate.c b/mm/migrate.c
index f9e16350d09c..626ca3c5d07b 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1125,7 +1125,12 @@ int migrate_pages(struct list_head *from, new_page_t get_new_page,
                                 nr_succeeded++;
                                 break;
                         default:
-                                /* Permanent failure */
+                                /*
+                                 * Permanent failure (-EBUSY, -ENOSYS, etc.):
+                                 * unlike -EAGAIN case, the failed page is
+                                 * removed from migration page list and not
+                                 * retried in the next outer loop.
+                                 */
                                 nr_failed++;
                                 break;
                         }