From e2c1ab070fdc81010ec44634838d24fce9ff9e53 Mon Sep 17 00:00:00 2001 From: Miaohe Lin Date: Tue, 27 Jun 2023 19:28:08 +0800 Subject: mm: memory-failure: fix unexpected return value in soft_offline_page() When page_handle_poison() fails to handle the hugepage or free page in retry path, soft_offline_page() will return 0 while -EBUSY is expected in this case. Consequently the user will think soft_offline_page succeeds while it in fact failed. So the user will not try again later in this case. Link: https://lkml.kernel.org/r/20230627112808.1275241-1-linmiaohe@huawei.com Fixes: b94e02822deb ("mm,hwpoison: try to narrow window race for free pages") Signed-off-by: Miaohe Lin Acked-by: Naoya Horiguchi Cc: Signed-off-by: Andrew Morton --- mm/memory-failure.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'mm/memory-failure.c') diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 139b31fdb678..fe121fdb05f7 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -2741,10 +2741,13 @@ retry: if (ret > 0) { ret = soft_offline_in_use_page(page); } else if (ret == 0) { - if (!page_handle_poison(page, true, false) && try_again) { - try_again = false; - flags &= ~MF_COUNT_INCREASED; - goto retry; + if (!page_handle_poison(page, true, false)) { + if (try_again) { + try_again = false; + flags &= ~MF_COUNT_INCREASED; + goto retry; + } + ret = -EBUSY; } } -- cgit