The patch titled
Subject: mm-allow-anon-exclusive-check-over-hugetlb-tail-pages-fix
has been added to the -mm mm-unstable branch. Its filename is
mm-allow-anon-exclusive-check-over-hugetlb-tail-pages-fix.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-allow-anon-exclusive-check-over-hugetlb-tail-pages-fix.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-allow-anon-exclusive-check-over-hugetlb-tail-pages-fix
Date: Thu Apr 4 01:27:47 PM PDT 2024
simplify PageAnonExclusive(), per Matthew
Link: https://lkml.kernel.org/r/Zg3u5Sh9EbbYPhaI@xxxxxxxxxxxxxxxxxxxx
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Huacai Chen <chenhuacai@xxxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Ryan Roberts <ryan.roberts@xxxxxxx>
Cc: WANG Xuerui <kernel@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/page-flags.h | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
--- a/include/linux/page-flags.h~mm-allow-anon-exclusive-check-over-hugetlb-tail-pages-fix
+++ a/include/linux/page-flags.h
@@ -1096,11 +1096,10 @@ static __always_inline int PageAnonExclu
{
VM_BUG_ON_PGFLAGS(!PageAnon(page), page);
/*
- * Allow the anon-exclusive check to work on hugetlb tail pages.
- * Here hugetlb pages will always guarantee the anon-exclusiveness
- * of the head page represents the tail pages.
+ * HugeTLB stores this information on the head page; THP keeps it per
+ * page
*/
- if (PageHuge(page) && !PageHead(page))
+ if (PageHuge(page))
page = compound_head(page);
return test_bit(PG_anon_exclusive, &PF_ANY(page, 1)->flags);
}
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
mm-sparc-change-pxd_huge-behavior-to-exclude-swap-entries-fix.patch
mm-hold-ptl-from-the-first-pte-while-reclaiming-a-large-folio-fix.patch
sh-remove-use-of-pg_arch_1-on-individual-pages-fix.patch
mm-gup-drop-folio_fast_pin_allowed-in-hugepd-processing-fix.patch
mm-allow-anon-exclusive-check-over-hugetlb-tail-pages-fix.patch
__mod_memcg_lruvec_state-enhance-diagnostics.patch
__mod_memcg_lruvec_state-enhance-diagnostics-fix.patch
