The ARM64 platform can support CONT-PTE/PMD size hugetlb, which can
contain seravel continuous pte or pmd entries. However current
huge_ptep_get() only return one specific pte value for the CONT-PTE
or CONT-PMD size hugetlb, which did not take into accounts the
subpages' dirty or young flags. So the gather_hugetlb_stats()
will miss some dirty hugetlb statistics.
Thus change to use huge_ptep_get_access_flags() taking into accounts
the subpages' dirty or young flags of a CONT-PTE/PMD size hugetlb,
to make the hugetlb statistics more accurate.
Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index f9c9abb..3f224a7 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1880,7 +1880,8 @@ static int gather_pte_stats(pmd_t *pmd, unsigned long addr,
static int gather_hugetlb_stats(pte_t *pte, unsigned long hmask,
unsigned long addr, unsigned long end, struct mm_walk *walk)
{
- pte_t huge_pte = huge_ptep_get(pte);
+ pte_t huge_pte = huge_ptep_get_access_flags(pte,
+ huge_page_size(hstate_vma(walk->vma)));
struct numa_maps *md;
struct page *page;
--
1.8.3.1
