diff mbox series

[07/10] mm/hugetlb: fix potential missing huge page size info

Message ID 20210112234924.NrJbRP05o%akpm@linux-foundation.org (mailing list archive)
State New, archived
Headers show
Series [01/10] mm, slub: consider rest of partial list if acquire_slab() fails | expand

Commit Message

Andrew Morton Jan. 12, 2021, 11:49 p.m. UTC 
From: Miaohe Lin <linmiaohe@huawei.com>
Subject: mm/hugetlb: fix potential missing huge page size info

The huge page size is encoded for VM_FAULT_HWPOISON errors only.  So if we
return VM_FAULT_HWPOISON, huge page size would just be ignored.

Link: https://lkml.kernel.org/r/20210107123449.38481-1-linmiaohe@huawei.com
Fixes: aa50d3a7aa81 ("Encode huge page size for VM_FAULT_HWPOISON errors")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/hugetlb.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

--- a/mm/hugetlb.c~mm-hugetlb-fix-potential-missing-huge-page-size-info
+++ a/mm/hugetlb.c
@@ -4371,7 +4371,7 @@  retry:
 		 * So we need to block hugepage fault by PG_hwpoison bit check.
 		 */
 		if (unlikely(PageHWPoison(page))) {
-			ret = VM_FAULT_HWPOISON |
+			ret = VM_FAULT_HWPOISON_LARGE |
 				VM_FAULT_SET_HINDEX(hstate_index(h));
 			goto backout_unlocked;
 		}