Commit 2a1b8648 authored by Miaohe Lin's avatar Miaohe Lin Committed by Andrew Morton
Browse files

mm/huge_memory: ensure huge_zero_folio won't have large_rmappable flag set 

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: 5691753d ("mm: convert huge_zero_page to huge_zero_folio")
Signed-off-by: default avatarMiaohe 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: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 98b74bb4

mm/huge_memory.c

+2 −0
Original line number Diff line number Diff line
@@ -220,6 +220,8 @@ static bool get_huge_zero_page(void) 
		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();