The quilt patch titled
Subject: fs/proc/task_mmu: convert pagemap_hugetlb_range() to work on folios
has been removed from the -mm tree. Its filename was
fs-proc-task_mmu-convert-pagemap_hugetlb_range-to-work-on-folios.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: David Hildenbrand <david@xxxxxxxxxx>
Subject: fs/proc/task_mmu: convert pagemap_hugetlb_range() to work on folios
Date: Wed, 17 Apr 2024 11:23:12 +0200
Patch series "fs/proc/task_mmu: convert hugetlb functions to work on folis".
Let's convert two more functions, getting rid of two more page_mapcount()
calls.
This patch (of 2):
Let's get rid of another page_mapcount() check and simply use
folio_likely_mapped_shared(), which is precise for hugetlb folios.
While at it, also check for PMD table sharing, like we do in
smaps_hugetlb_range().
No functional change intended, except that we would now detect hugetlb
folios shared via PMD table sharing correctly.
Link: https://lkml.kernel.org/r/20240417092313.753919-1-david@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20240417092313.753919-2-david@xxxxxxxxxx
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: Oscar Salvador <osalvador@xxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/fs/proc/task_mmu.c~fs-proc-task_mmu-convert-pagemap_hugetlb_range-to-work-on-folios
+++ a/fs/proc/task_mmu.c
@@ -1578,12 +1578,13 @@ static int pagemap_hugetlb_range(pte_t *
pte = huge_ptep_get(ptep);
if (pte_present(pte)) {
- struct page *page = pte_page(pte);
+ struct folio *folio = page_folio(pte_page(pte));
- if (!PageAnon(page))
+ if (!folio_test_anon(folio))
flags |= PM_FILE;
- if (page_mapcount(page) == 1)
+ if (!folio_likely_mapped_shared(folio) &&
+ !hugetlb_pmd_shared(ptep))
flags |= PM_MMAP_EXCLUSIVE;
if (huge_pte_uffd_wp(pte))
_
Patches currently in -mm which might be from david@xxxxxxxxxx are
