The patch titled
Subject: mm/hugetlb: set head flag before setting compound_order in __prep_compound_gigantic_folio
has been added to the -mm mm-unstable branch. Its filename is
mm-hugetlb-set-head-flag-before-setting-compound_order-in-__prep_compound_gigantic_folio.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-hugetlb-set-head-flag-before-setting-compound_order-in-__prep_compound_gigantic_folio.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: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Subject: mm/hugetlb: set head flag before setting compound_order in __prep_compound_gigantic_folio
Date: Mon, 12 Dec 2022 14:55:29 -0800
folio_set_compound_order() checks if the passed in folio is a large folio.
A large folio is indicated by the PG_head flag. Call __folio_set_head()
before setting the order.
Link: https://lkml.kernel.org/r/20221212225529.22493-1-sidhartha.kumar@xxxxxxxxxx
Fixes: d1c6095572d0 ("mm/hugetlb: convert hugetlb prep functions to folios")
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Reported-by: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/mm/hugetlb.c~mm-hugetlb-set-head-flag-before-setting-compound_order-in-__prep_compound_gigantic_folio
+++ a/mm/hugetlb.c
@@ -1805,10 +1805,10 @@ static bool __prep_compound_gigantic_fol
int nr_pages = 1 << order;
struct page *p;
- /* we rely on prep_new_hugetlb_folio to set the destructor */
- folio_set_compound_order(folio, order);
__folio_clear_reserved(folio);
__folio_set_head(folio);
+ /* we rely on prep_new_hugetlb_folio to set the destructor */
+ folio_set_compound_order(folio, order);
for (i = 0; i < nr_pages; i++) {
p = folio_page(folio, i);
_
Patches currently in -mm which might be from sidhartha.kumar@xxxxxxxxxx are
mm-hugetlb-set-head-flag-before-setting-compound_order-in-__prep_compound_gigantic_folio.patch
