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From:   Yang Shi <shy828301@gmail.com>
To:     naoya.horiguchi@nec.com, hughd@google.com,
        kirill.shutemov@linux.intel.com, willy@infradead.org,
        peterx@redhat.com, osalvador@suse.de, akpm@linux-foundation.org
Cc:     shy828301@gmail.com, linux-mm@kvack.org,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [v3 PATCH 5/5] mm: hwpoison: handle non-anonymous THP correctly
Date:   Thu, 30 Sep 2021 14:53:11 -0700
Message-Id: <20210930215311.240774-6-shy828301@gmail.com>
In-Reply-To: <20210930215311.240774-1-shy828301@gmail.com>
References: <20210930215311.240774-1-shy828301@gmail.com>
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Currently hwpoison doesn't handle non-anonymous THP, but since v4.8 THP
support for tmpfs and read-only file cache has been added.  They could
be offlined by split THP, just like anonymous THP.

Signed-off-by: Yang Shi <shy828301@gmail.com>
---
 mm/memory-failure.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 176883cd080f..88866bf4f4a9 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1447,14 +1447,11 @@ static int identify_page_state(unsigned long pfn, struct page *p,
 static int try_to_split_thp_page(struct page *page, const char *msg)
 {
 	lock_page(page);
-	if (!PageAnon(page) || unlikely(split_huge_page(page))) {
+	if (unlikely(split_huge_page(page))) {
 		unsigned long pfn = page_to_pfn(page);
 
 		unlock_page(page);
-		if (!PageAnon(page))
-			pr_info("%s: %#lx: non anonymous thp\n", msg, pfn);
-		else
-			pr_info("%s: %#lx: thp split failed\n", msg, pfn);
+		pr_info("%s: %#lx: thp split failed\n", msg, pfn);
 		put_page(page);
 		return -EBUSY;
 	}
-- 
2.26.2