The patch titled
Subject: mm/huge_memory: ensure huge_zero_folio won't have large_rmappable flag set
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
mm-huge_memory-ensure-huge_zero_folio-wont-have-large_rmappable-flag-set.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-huge_memory-ensure-huge_zero_folio-wont-have-large_rmappable-flag-set.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm/huge_memory: ensure huge_zero_folio won't have large_rmappable flag set
Date: Sat, 14 Sep 2024 09:53:06 +0800
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>
---
mm/huge_memory.c | 2 ++
1 file changed, 2 insertions(+)
--- a/mm/huge_memory.c~mm-huge_memory-ensure-huge_zero_folio-wont-have-large_rmappable-flag-set
+++ a/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 -mm which might be from linmiaohe@xxxxxxxxxx are
mm-huge_memory-ensure-huge_zero_folio-wont-have-large_rmappable-flag-set.patch
mm-memory-failure-fix-vm_bug_on_pagepagepoisonedpage-when-unpoison-memory.patch
