[PATCH] Hugetlb pages rss accounting is incorrect in /proc/<pid>/smaps

[Prakash Sangappa]

Resident set size(Rss) accounting of hugetlb pages is not done
currently in /proc/<pid>/smaps. The pmap command reads rss from
this file and so it shows Rss to be 0 in pmap -x output for
hugetlb mapped vmas. This patch fixes it.

Signed-off-by: Prakash Sangappa <prakash.sangappa@xxxxxxxxxx>
---
 fs/proc/task_mmu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 5589b4b..c7e1048 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -724,6 +724,7 @@ static int smaps_hugetlb_range(pte_t *pte, unsigned long hmask,
 			mss->shared_hugetlb += huge_page_size(hstate_vma(vma));
 		else
 			mss->private_hugetlb += huge_page_size(hstate_vma(vma));
+		mss->resident += huge_page_size(hstate_vma(vma));
 	}
 	return 0;
 }
-- 
2.7.4