diff options
| -rw-r--r-- | mm/memory_hotplug.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index d4b5f29906b9..c7c74a927d6f 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -35,6 +35,7 @@ #include <linux/memblock.h> #include <linux/bootmem.h> #include <linux/compaction.h> +#include <linux/rmap.h> #include <asm/tlbflush.h> @@ -1391,6 +1392,21 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn) pfn = page_to_pfn(compound_head(page)) + hpage_nr_pages(page) - 1; + /* + * HWPoison pages have elevated reference counts so the migration would + * fail on them. It also doesn't make any sense to migrate them in the + * first place. Still try to unmap such a page in case it is still mapped + * (e.g. current hwpoison implementation doesn't unmap KSM pages but keep + * the unmap as the catch all safety net). + */ + if (PageHWPoison(page)) { + if (WARN_ON(PageLRU(page))) + isolate_lru_page(page); + if (page_mapped(page)) + try_to_unmap(page, TTU_IGNORE_MLOCK | TTU_IGNORE_ACCESS); + continue; + } + if (!get_page_unless_zero(page)) continue; /* |