summaryrefslogtreecommitdiffstats
path: root/mm/memory-failure.c
diff options
context:
space:
mode:
Diffstat (limited to 'mm/memory-failure.c')
-rw-r--r--mm/memory-failure.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index c83a1746812f..49dc32c61137 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1598,8 +1598,18 @@ static int soft_offline_huge_page(struct page *page, int flags)
if (ret > 0)
ret = -EIO;
} else {
- if (PageHuge(page))
- dissolve_free_huge_page(page);
+ /*
+ * We set PG_hwpoison only when the migration source hugepage
+ * was successfully dissolved, because otherwise hwpoisoned
+ * hugepage remains on free hugepage list, then userspace will
+ * find it as SIGBUS by allocation failure. That's not expected
+ * in soft-offlining.
+ */
+ ret = dissolve_free_huge_page(page);
+ if (!ret) {
+ if (set_hwpoison_free_buddy_page(page))
+ num_poisoned_pages_inc();
+ }
}
return ret;
}
@@ -1715,13 +1725,13 @@ static int soft_offline_in_use_page(struct page *page, int flags)
static void soft_offline_free_page(struct page *page)
{
+ int rc = 0;
struct page *head = compound_head(page);
- if (!TestSetPageHWPoison(head)) {
+ if (PageHuge(head))
+ rc = dissolve_free_huge_page(page);
+ if (!rc && !TestSetPageHWPoison(page))
num_poisoned_pages_inc();
- if (PageHuge(head))
- dissolve_free_huge_page(page);
- }
}
/**