[RFC PATCH 3/5] mm proc/task_mmu.c: add soft dirty pte checks for hugetlb
From: Mike Kravetz <hidden>
Date: 2021-02-11 00:05:55
Also in:
linux-s390, lkml
Subsystem:
filesystems (vfs and infrastructure), memory mapping, proc filesystem, the rest · Maintainers:
Alexander Viro, Christian Brauner, Andrew Morton, Liam R. Howlett, Lorenzo Stoakes, Linus Torvalds
Pagemap was only using the vma flag PM_SOFT_DIRTY for hugetlb vmas. This is insufficient. Check the individual pte entries. Signed-off-by: Mike Kravetz <redacted> --- fs/proc/task_mmu.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 602e3a52884d..829b35016aaa 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c@@ -1507,6 +1507,10 @@ static int pagemap_hugetlb_range(pte_t *ptep, unsigned long hmask, flags |= PM_SOFT_DIRTY; pte = huge_ptep_get(ptep); + + if (huge_pte_soft_dirty(pte)) + flags |= PM_SOFT_DIRTY; + if (pte_present(pte)) { struct page *page = pte_page(pte);
--
2.29.2