From: Oscar Salvador <osalvador@xxxxxxx> Subject: mm,hwpoison: return -EBUSY when migration fails Currently, we return -EIO when we fail to migrate the page. Migrations' failures are rather transient as they can happen due to several reasons, e.g: high page refcount bump, mapping->migrate_page failing etc. All meaning that at that time the page could not be migrated, but that has nothing to do with an EIO error. Let us return -EBUSY instead, as we do in case we failed to isolate the page. While are it, let us remove the "ret" print as its value does not change. Link: https://lkml.kernel.org/r/20201209092818.30417-1-osalvador@xxxxxxx Signed-off-by: Oscar Salvador <osalvador@xxxxxxx> Acked-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx> Acked-by: Vlastimil Babka <vbabka@xxxxxxx> Cc: David Hildenbrand <david@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/memory-failure.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/mm/memory-failure.c~mmhwpoison-return-ebusy-when-migration-fails +++ a/mm/memory-failure.c @@ -1855,11 +1855,11 @@ static int __soft_offline_page(struct pa pr_info("soft offline: %#lx: %s migration failed %d, type %lx (%pGp)\n", pfn, msg_page[huge], ret, page->flags, &page->flags); if (ret > 0) - ret = -EIO; + ret = -EBUSY; } } else { - pr_info("soft offline: %#lx: %s isolation failed: %d, page count %d, type %lx (%pGp)\n", - pfn, msg_page[huge], ret, page_count(page), page->flags, &page->flags); + pr_info("soft offline: %#lx: %s isolation failed, page count %d, type %lx (%pGp)\n", + pfn, msg_page[huge], page_count(page), page->flags, &page->flags); ret = -EBUSY; } return ret; _
