[PATCH] docs: add VmPMD description in proc

[Chen Hanxiao <chenhanxiao@cn.fujitsu.com>]

commit dc6c9a35b66b ("mm: account pmd page tables to the process")
add VmPMD in /proc/PID/status.
This patch add a description in proc.txt for it.

cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Chen Hanxiao <chenhanxiao@cn.fujitsu.com>
---
 Documentation/filesystems/proc.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index c3b6b30..e8aba97 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -235,6 +235,7 @@ Table 1-2: Contents of the status files (as of 3.20.0)
  VmExe                       size of text segment
  VmLib                       size of shared library code
  VmPTE                       size of page table entries
+ VmPMD                       size of page middle directory
  VmSwap                      size of swap usage (the number of referred swapents)
  Threads                     number of threads
  SigQ                        number of signals queued/max. number for queue
-- 
2.1.0