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-rw-r--r--fs/proc/task_mmu.c4
-rw-r--r--include/linux/hugetlb.h13
2 files changed, 14 insertions, 3 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index e35a0398db63..af1c49ae11b1 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -745,9 +745,7 @@ static int smaps_hugetlb_range(pte_t *pte, unsigned long hmask,
page = pfn_swap_entry_to_page(swpent);
}
if (page) {
- int mapcount = page_mapcount(page);
-
- if (mapcount >= 2)
+ if (page_mapcount(page) >= 2 || hugetlb_pmd_shared(pte))
mss->shared_hugetlb += huge_page_size(hstate_vma(vma));
else
mss->private_hugetlb += huge_page_size(hstate_vma(vma));
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 551834cd5299..db194e2ba69f 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -7,6 +7,7 @@
#include <linux/fs.h>
#include <linux/hugetlb_inline.h>
#include <linux/cgroup.h>
+#include <linux/page_ref.h>
#include <linux/list.h>
#include <linux/kref.h>
#include <linux/pgtable.h>
@@ -1187,6 +1188,18 @@ static inline __init void hugetlb_cma_reserve(int order)
}
#endif
+#ifdef CONFIG_ARCH_WANT_HUGE_PMD_SHARE
+static inline bool hugetlb_pmd_shared(pte_t *pte)
+{
+ return page_count(virt_to_page(pte)) > 1;
+}
+#else
+static inline bool hugetlb_pmd_shared(pte_t *pte)
+{
+ return false;
+}
+#endif
+
bool want_pmd_share(struct vm_area_struct *vma, unsigned long addr);
#ifndef __HAVE_ARCH_FLUSH_HUGETLB_TLB_RANGE