[PATCH v2 3/8] mm: memory-failure: Don't account hwpoison_filter() filtered pages

From: Miaohe Lin
Date: Tue Jul 11 2023 - 01:50:12 EST


mf_generic_kill_procs() will return -EOPNOTSUPP when hwpoison_filter()
filtered dax page. In that case, action_result() isn't expected to be
called to update mf_stats. This will results in inaccurate but benign
memory failure handling statistics.

Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Acked-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
---
mm/memory-failure.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index feca3c4068a5..c80b7d9505d8 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -2108,7 +2108,8 @@ static int memory_failure_dev_pagemap(unsigned long pfn, int flags,
out:
/* drop pgmap ref acquired in caller */
put_dev_pagemap(pgmap);
- action_result(pfn, MF_MSG_DAX, rc ? MF_FAILED : MF_RECOVERED);
+ if (rc != -EOPNOTSUPP)
+ action_result(pfn, MF_MSG_DAX, rc ? MF_FAILED : MF_RECOVERED);
return rc;
}

--
2.33.0