On Thu, Aug 18, 2022 at 09:00:13PM +0800, Miaohe Lin wrote:
> When hwpoison_filter() refuses to soft offline a page, the page refcnt
> incremented previously by MF_COUNT_INCREASED would have been consumed
> via get_hwpoison_page() if ret <= 0. So the put_ref_page() here will
> put the extra one. Remove it to fix the issue.
>
> Fixes: 9113eaf331bf ("mm/memory-failure.c: add hwpoison_filter for soft offline")
> Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Acked-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
> ---
> mm/memory-failure.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/mm/memory-failure.c b/mm/memory-failure.c
> index 0c5ad7505b99..7023c3d81273 100644
> --- a/mm/memory-failure.c
> +++ b/mm/memory-failure.c
> @@ -2591,8 +2591,6 @@ int soft_offline_page(unsigned long pfn, int flags)
> if (hwpoison_filter(page)) {
> if (ret > 0)
> put_page(page);
> - else
> - put_ref_page(ref_page);
>
> mutex_unlock(&mf_mutex);
> return -EOPNOTSUPP;
> --
> 2.23.0
