6.10-stable review patch. If anyone has any objections, please let me know.
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From: Miaohe Lin linmiaohe@huawei.com
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@huawei.com Fixes: 5691753d73a2 ("mm: convert huge_zero_page to huge_zero_folio") Signed-off-by: Miaohe Lin linmiaohe@huawei.com Cc: David Hildenbrand david@redhat.com Cc: Matthew Wilcox (Oracle) willy@infradead.org Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- mm/huge_memory.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -214,6 +214,8 @@ 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();