@@ -3,12 +3,12 @@

 # This tool lists processes that lock memory pages from swapping to disk.

 import re

-import subprocess

 import psutil

-SUMMARY_REGEX = re.compile(b".*\s+(?P<locked>[\d]+)\s+KB")

+LCK_SUMMARY_REGEX = re.compile(

+    "^VmLck:\s+(?P<locked>[\d]+)\s+kB", re.MULTILINE)

 def main():

@@ -22,28 +22,21 @@ def main():

 def _get_report():

     mlock_users = []

     for proc in psutil.process_iter():

-        pid = proc.pid

         # sadly psutil does not expose locked pages info, that's why we

-        # call to pmap and parse the output here

+        # iterate over the /proc/%pid/status files manually

         try:

-            out = subprocess.check_output(['pmap', '-XX', str(pid)])

-        except subprocess.CalledProcessError as e:

-            # 42 means process just vanished, which is ok

-            if e.returncode == 42:

-                continue

-            raise

-        last_line = out.splitlines()[-1]

-

-        # some processes don't provide a memory map, for example those

-        # running as kernel services, so we need to skip those that don't

-        # match

-        result = SUMMARY_REGEX.match(last_line)

-        if result:

-            locked = int(result.group('locked'))

-            if locked:

-                mlock_users.append({'name': proc.name(),

-                                    'pid': pid,

-                                    'locked': locked})

+            s = open("%s/%d/status" % (psutil.PROCFS_PATH, proc.pid), 'r')

+        except EnvironmentError:

+            continue

+        with s:

+            for line in s:

+                result = LCK_SUMMARY_REGEX.search(line)

+                if result:

+                    locked = int(result.group('locked'))

+                    if locked:

+                        mlock_users.append({'name': proc.name(),

+                                            'pid': proc.pid,

+                                            'locked': locked})

     # produce a single line log message with per process mlock stats

     if mlock_users: