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-rw-r--r--mm/page_isolation.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index 2c11a38d6e87..f6d07c5f0d34 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -151,6 +151,7 @@ __first_valid_page(unsigned long pfn, unsigned long nr_pages)
* a bit mask)
* MEMORY_OFFLINE - isolate to offline (!allocate) memory
* e.g., skip over PageHWPoison() pages
+ * and PageOffline() pages.
* REPORT_FAILURE - report details about the failure to
* isolate the range
*
@@ -259,6 +260,14 @@ __test_page_isolated_in_pageblock(unsigned long pfn, unsigned long end_pfn,
else if ((flags & MEMORY_OFFLINE) && PageHWPoison(page))
/* A HWPoisoned page cannot be also PageBuddy */
pfn++;
+ else if ((flags & MEMORY_OFFLINE) && PageOffline(page) &&
+ !page_count(page))
+ /*
+ * The responsible driver agreed to skip PageOffline()
+ * pages when offlining memory by dropping its
+ * reference in MEM_GOING_OFFLINE.
+ */
+ pfn++;
else
break;
}