diff mbox series

[v2,3/5] mm: hwpoison: remove the unnecessary THP check

Message ID 20210923032830.314328-4-shy828301@gmail.com (mailing list archive)
State New
Headers show
Series Solve silent data loss caused by poisoned page cache (shmem/tmpfs) | expand

Commit Message

Yang Shi Sept. 23, 2021, 3:28 a.m. UTC 
When handling THP hwpoison checked if the THP is in allocation or free
stage since hwpoison may mistreat it as hugetlb page.  After
commit 415c64c1453a ("mm/memory-failure: split thp earlier in memory error
handling") the problem has been fixed, so this check is no longer
needed.  Remove it.  The side effect of the removal is hwpoison may
report unsplit THP instead of unknown error for shmem THP.  It seems not
like a big deal.

Suggested-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Signed-off-by: Yang Shi <shy828301@gmail.com>
---
 mm/memory-failure.c | 14 --------------
 1 file changed, 14 deletions(-)
diff mbox series

Patch

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 7722197b2b9d..5c7f1c2aabd9 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1182,20 +1182,6 @@  static int __get_hwpoison_page(struct page *page)
 	if (!HWPoisonHandlable(head))
 		return -EBUSY;
 
-	if (PageTransHuge(head)) {
-		/*
-		 * Non anonymous thp exists only in allocation/free time. We
-		 * can't handle such a case correctly, so let's give it up.
-		 * This should be better than triggering BUG_ON when kernel
-		 * tries to touch the "partially handled" page.
-		 */
-		if (!PageAnon(head)) {
-			pr_err("Memory failure: %#lx: non anonymous thp\n",
-				page_to_pfn(page));
-			return 0;
-		}
-	}
-
 	if (get_page_unless_zero(head)) {
 		if (head == compound_head(page))
 			return 1;