| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.14 001/162] mm, hwpoison: add is_free_buddy_page() in HWPoisonHandlable() | Date | Mon, 27 Sep 2021 19:00:47 +0200 |
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From: Naoya Horiguchi <naoya.horiguchi@nec.com>
commit acfa299a4a63a58e5e81a87cb16798f20d35f7d7 upstream.
Commit fcc00621d88b ("mm/hwpoison: retry with shake_page() for unhandlable pages") changed the return value of __get_hwpoison_page() to retry for transiently unhandlable cases. However, __get_hwpoison_page() currently fails to properly judge buddy pages as handlable, so hard/soft offline for buddy pages always fail as "unhandlable page". This is totally regrettable.
So let's add is_free_buddy_page() in HWPoisonHandlable(), so that __get_hwpoison_page() returns different return values between buddy pages and unhandlable pages as intended.
Link: https://lkml.kernel.org/r/20210909004131.163221-1-naoya.horiguchi@linux.dev Fixes: fcc00621d88b ("mm/hwpoison: retry with shake_page() for unhandlable pages") Signed-off-by: Naoya Horiguchi <naoya.horiguchi@nec.com> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Yang Shi <shy828301@gmail.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- mm/memory-failure.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1127,7 +1127,7 @@ static int page_action(struct page_state */ static inline bool HWPoisonHandlable(struct page *page) { - return PageLRU(page) || __PageMovable(page); + return PageLRU(page) || __PageMovable(page) || is_free_buddy_page(page); } static int __get_hwpoison_page(struct page *page)
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