From: Miaohe Lin <linmiaohe@xxxxxxxxxx> commit 2a1b8648d9be9f37f808a36c0f74adb8c53d06e6 upstream. Ensure huge_zero_folio won't have large_rmappable flag set. So it can be reported as thp,zero correctly through stable_page_flags(). Link: https://lkml.kernel.org/r/20240914015306.3656791-1-linmiaohe@xxxxxxxxxx Fixes: 5691753d73a2 ("mm: convert huge_zero_page to huge_zero_folio") Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx> Cc: David Hildenbrand <david@xxxxxxxxxx> Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- mm/huge_memory.c | 2 ++ 1 file changed, 2 insertions(+) --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -220,6 +220,8 @@ retry: count_vm_event(THP_ZERO_PAGE_ALLOC_FAILED); return false; } + /* Ensure zero folio won't have large_rmappable flag set. */ + folio_clear_large_rmappable(zero_folio); preempt_disable(); if (cmpxchg(&huge_zero_folio, NULL, zero_folio)) { preempt_enable(); Patches currently in stable-queue which might be from linmiaohe@xxxxxxxxxx are queue-6.11/mm-huge_memory-ensure-huge_zero_folio-won-t-have-large_rmappable-flag-set.patch
