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

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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: 5691753d73 ("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>
This commit is contained in:
Miaohe Lin 2024-09-14 09:53:06 +08:00 committed by Greg Kroah-Hartman
parent d59ebc99de
commit 04966116d7
1 changed files with 2 additions and 0 deletions
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2
mm/huge_memory.c
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@ -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();