Re: [PATCH] mm, memory_hotplug: Don't bail out in do_migrate_range prematurely

[osalvador]

On 2018-12-11 09:50, Oscar Salvador wrote:

> -		} else {
> -			pr_warn("failed to isolate pfn %lx\n", pfn);
> -			dump_page(page, "isolation failed");
> -			put_page(page);
> -			/* Because we don't have big zone->lock. we should
> -			   check this again here. */
> -			if (page_count(page)) {
> -				not_managed++;
> -				ret = -EBUSY;
> -				break;

I forgot that here we should at least leave the put_page().
But leave also the dump_page() and the pr_warn().

--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1394,6 +1394,10 @@ do_migrate_range(unsigned long start_pfn, 
unsigned long end_pfn)
                                inc_node_page_state(page, 
NR_ISOLATED_ANON +
                                                    
page_is_file_cache(page));

+               } else {
+                       pr_warn("failed to isolate pfn %lx\n", pfn);
+                       dump_page(page, "isolation failed");
+                       put_page(page);
                }
        }
        if (!list_empty(&source)) {