2 files changed, 23 insertions, 4 deletions

diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index fdeb5b33349f..ffcd49589ab5 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -169,6 +169,9 @@ read the file /proc/PID/status:
   VmLck:         0 kB
   VmHWM:       476 kB
   VmRSS:       476 kB
+  RssAnon:             352 kB
+  RssFile:             120 kB
+  RssShmem:              4 kB
   VmData:      156 kB
   VmStk:        88 kB
   VmExe:        68 kB
@@ -231,7 +234,12 @@ Table 1-2: Contents of the status files (as of 4.1)
  VmSize                      total program size
  VmLck                       locked memory size
  VmHWM                       peak resident set size ("high water mark")
- VmRSS                       size of memory portions
+ VmRSS                       size of memory portions. It contains the three
+                             following parts (VmRSS = RssAnon + RssFile + RssShmem)
+ RssAnon                     size of resident anonymous memory
+ RssFile                     size of resident file mappings
+ RssShmem                    size of resident shmem memory (includes SysV shm,
+                             mapping of tmpfs and shared anonymous mappings)
  VmData                      size of data, stack, and text segments
  VmStk                       size of data, stack, and text segments
  VmExe                       size of text segment
@@ -266,7 +274,8 @@ Table 1-3: Contents of the statm files (as of 2.6.8-rc3)
  Field    Content
  size     total program size (pages)            (same as VmSize in status)
  resident size of memory portions (pages)       (same as VmRSS in status)
- shared   number of pages that are shared       (i.e. backed by a file)
+ shared   number of pages that are shared       (i.e. backed by a file, same
+                                                as RssFile+RssShmem in status)
  trs      number of pages that are 'code'       (not including libs; broken,
                                                         includes data segment)
  lrs      number of pages of library            (always 0 on 2.6)
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 45eb24145978..18a30aedfa5d 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -23,9 +23,13 @@
 
 void task_mem(struct seq_file *m, struct mm_struct *mm)
 {
-        unsigned long data, text, lib, swap, ptes, pmds;
+        unsigned long data, text, lib, swap, ptes, pmds, anon, file, shmem;
         unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss;
 
+        anon = get_mm_counter(mm, MM_ANONPAGES);
+        file = get_mm_counter(mm, MM_FILEPAGES);
+        shmem = get_mm_counter(mm, MM_SHMEMPAGES);
+
         /*
          * Note: to minimize their overhead, mm maintains hiwater_vm and
          * hiwater_rss only when about to *lower* total_vm or rss.  Any
@@ -36,7 +40,7 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
         hiwater_vm = total_vm = mm->total_vm;
         if (hiwater_vm < mm->hiwater_vm)
                 hiwater_vm = mm->hiwater_vm;
-        hiwater_rss = total_rss = get_mm_rss(mm);
+        hiwater_rss = total_rss = anon + file + shmem;
         if (hiwater_rss < mm->hiwater_rss)
                 hiwater_rss = mm->hiwater_rss;
 
@@ -53,6 +57,9 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
                 "VmPin:\t%8lu kB\n"
                 "VmHWM:\t%8lu kB\n"
                 "VmRSS:\t%8lu kB\n"
+                "RssAnon:\t%8lu kB\n"
+                "RssFile:\t%8lu kB\n"
+                "RssShmem:\t%8lu kB\n"
                 "VmData:\t%8lu kB\n"
                 "VmStk:\t%8lu kB\n"
                 "VmExe:\t%8lu kB\n"
@@ -66,6 +73,9 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
                 mm->pinned_vm << (PAGE_SHIFT-10),
                 hiwater_rss << (PAGE_SHIFT-10),
                 total_rss << (PAGE_SHIFT-10),
+                anon << (PAGE_SHIFT-10),
+                file << (PAGE_SHIFT-10),
+                shmem << (PAGE_SHIFT-10),
                 data << (PAGE_SHIFT-10),
                 mm->stack_vm << (PAGE_SHIFT-10), text, lib,
                 ptes >> 10,