2 files changed, 9 insertions, 4 deletions

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 88d50e74e3fe..c82193db4be6 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1388,10 +1388,8 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
                                                     page_is_file_cache(page));
 
                 } else {
-#ifdef CONFIG_DEBUG_VM
-                        pr_alert("failed to isolate pfn %lx\n", pfn);
+                        pr_warn("failed to isolate pfn %lx\n", pfn);
                         dump_page(page, "isolation failed");
-#endif
                         put_page(page);
                         /* Because we don't have big zone->lock. we should
                            check this again here. */
@@ -1411,8 +1409,14 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
                 /* Allocate a new page from the nearest neighbor node */
                 ret = migrate_pages(&source, new_node_page, NULL, 0,
                                         MIGRATE_SYNC, MR_MEMORY_HOTPLUG);
-                if (ret)
+                if (ret) {
+                        list_for_each_entry(page, &source, lru) {
+                                pr_warn("migrating pfn %lx failed ret:%d ",
+                                       page_to_pfn(page), ret);
+                                dump_page(page, "migration failure");
+                        }
                         putback_movable_pages(&source);
+                }
         }
 out:
         return ret;
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d245de2124e3..c6f090e9a112 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -7869,6 +7869,7 @@ bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
         return false;
 unmovable:
         WARN_ON_ONCE(zone_idx(zone) == ZONE_MOVABLE);
+        dump_page(pfn_to_page(pfn+iter), "unmovable page");
         return true;
 }