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Subject[PATCH] mm/hwpoison-inject: support injecting hwpoison to free page
Date
memory_failure() can handle free buddy page. Support injecting hwpoison
to free page by adding is_free_buddy_page check when hwpoison filter is
disabled.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
mm/hwpoison-inject.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/hwpoison-inject.c b/mm/hwpoison-inject.c
index aff4d27ec235..f74552977649 100644
--- a/mm/hwpoison-inject.c
+++ b/mm/hwpoison-inject.c
@@ -32,9 +32,9 @@ static int hwpoison_inject(void *data, u64 val)

shake_page(hpage);
/*
- * This implies unable to support non-LRU pages.
+ * This implies unable to support non-LRU pages except free page.
*/
- if (!PageLRU(hpage) && !PageHuge(p))
+ if (!PageLRU(hpage) && !PageHuge(p) && !is_free_buddy_page(p))
return 0;

/*
--
2.23.0
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