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Subject[RFC PATCH 3/5] mm proc/task_mmu.c: add soft dirty pte checks for hugetlb
Date
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 <mike.kravetz@oracle.com>
---
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
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