1 files changed, 54 insertions, 7 deletions

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 2a1bef9203c6..183f8ff5f400 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -16,7 +16,7 @@
 
 void task_mem(struct seq_file *m, struct mm_struct *mm)
 {
-        unsigned long data, text, lib;
+        unsigned long data, text, lib, swap;
         unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss;
 
         /*
@@ -36,6 +36,7 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
         data = mm->total_vm - mm->shared_vm - mm->stack_vm;
         text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10;
         lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text;
+        swap = get_mm_counter(mm, MM_SWAPENTS);
         seq_printf(m,
                 "VmPeak:\t%8lu kB\n"
                 "VmSize:\t%8lu kB\n"
@@ -46,7 +47,8 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
                 "VmStk:\t%8lu kB\n"
                 "VmExe:\t%8lu kB\n"
                 "VmLib:\t%8lu kB\n"
-                "VmPTE:\t%8lu kB\n",
+                "VmPTE:\t%8lu kB\n"
+                "VmSwap:\t%8lu kB\n",
                 hiwater_vm << (PAGE_SHIFT-10),
                 (total_vm - mm->reserved_vm) << (PAGE_SHIFT-10),
                 mm->locked_vm << (PAGE_SHIFT-10),
@@ -54,7 +56,8 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
                 total_rss << (PAGE_SHIFT-10),
                 data << (PAGE_SHIFT-10),
                 mm->stack_vm << (PAGE_SHIFT-10), text, lib,
-                (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10);
+                (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10,
+                swap << (PAGE_SHIFT-10));
 }
 
 unsigned long task_vsize(struct mm_struct *mm)
@@ -65,11 +68,11 @@ unsigned long task_vsize(struct mm_struct *mm)
 int task_statm(struct mm_struct *mm, int *shared, int *text,
                int *data, int *resident)
 {
-        *shared = get_mm_counter(mm, file_rss);
+        *shared = get_mm_counter(mm, MM_FILEPAGES);
         *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK))
                                                                 >> PAGE_SHIFT;
         *data = mm->total_vm - mm->shared_vm;
-        *resident = *shared + get_mm_counter(mm, anon_rss);
+        *resident = *shared + get_mm_counter(mm, MM_ANONPAGES);
         return mm->total_vm;
 }
 
@@ -361,12 +364,11 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
                 if (!pte_present(ptent))
                         continue;
 
-                mss->resident += PAGE_SIZE;
-
                 page = vm_normal_page(vma, addr, ptent);
                 if (!page)
                         continue;
 
+                mss->resident += PAGE_SIZE;
                 /* Accumulate the size in pages that have been accessed. */
                 if (pte_young(ptent) || PageReferenced(page))
                         mss->referenced += PAGE_SIZE;
@@ -650,6 +652,50 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
         return err;
 }
 
+static u64 huge_pte_to_pagemap_entry(pte_t pte, int offset)
+{
+        u64 pme = 0;
+        if (pte_present(pte))
+                pme = PM_PFRAME(pte_pfn(pte) + offset)
+                        | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT;
+        return pme;
+}
+
+static int pagemap_hugetlb_range(pte_t *pte, unsigned long addr,
+                                 unsigned long end, struct mm_walk *walk)
+{
+        struct vm_area_struct *vma;
+        struct pagemapread *pm = walk->private;
+        struct hstate *hs = NULL;
+        int err = 0;
+
+        vma = find_vma(walk->mm, addr);
+        if (vma)
+                hs = hstate_vma(vma);
+        for (; addr != end; addr += PAGE_SIZE) {
+                u64 pfn = PM_NOT_PRESENT;
+
+                if (vma && (addr >= vma->vm_end)) {
+                        vma = find_vma(walk->mm, addr);
+                        if (vma)
+                                hs = hstate_vma(vma);
+                }
+
+                if (vma && (vma->vm_start <= addr) && is_vm_hugetlb_page(vma)) {
+                        /* calculate pfn of the "raw" page in the hugepage. */
+                        int offset = (addr & ~huge_page_mask(hs)) >> PAGE_SHIFT;
+                        pfn = huge_pte_to_pagemap_entry(*pte, offset);
+                }
+                err = add_to_pagemap(addr, pfn, pm);
+                if (err)
+                        return err;
+        }
+
+        cond_resched();
+
+        return err;
+}
+
 /*
  * /proc/pid/pagemap - an array mapping virtual pages to pfns
  *
@@ -742,6 +788,7 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
 
         pagemap_walk.pmd_entry = pagemap_pte_range;
         pagemap_walk.pte_hole = pagemap_pte_hole;
+        pagemap_walk.hugetlb_entry = pagemap_hugetlb_range;
         pagemap_walk.mm = mm;
         pagemap_walk.private = &pm;