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authorDavid Hildenbrand <david@redhat.com>2024-04-17 12:23:12 +0300
committerAndrew Morton <akpm@linux-foundation.org>2024-05-06 03:53:41 +0300
commit88e4e47c12836cf6875f73fca87baaf20c6ca1a2 (patch)
treed25748502ae2d54da231d14b73741ffea72308ed
parent122ff80e12b3aa586d702b7fb651a99d443e7777 (diff)
downloadlinux-88e4e47c12836cf6875f73fca87baaf20c6ca1a2.tar.xz
fs/proc/task_mmu: convert pagemap_hugetlb_range() to work on folios
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@redhat.com Link: https://lkml.kernel.org/r/20240417092313.753919-2-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Cc: Muchun Song <muchun.song@linux.dev> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
-rw-r--r--fs/proc/task_mmu.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 8ff79bd427ec..cd6e45e0cde8 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1578,12 +1578,13 @@ static int pagemap_hugetlb_range(pte_t *ptep, unsigned long hmask,
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))