diff -r 9485165435e4 Lib/logging/__init__.py
--- a/Lib/logging/__init__.py	Wed Sep 28 23:17:12 2016 -0700
+++ b/Lib/logging/__init__.py	Thu Sep 29 17:01:11 2016 +0100
@@ -273,6 +273,7 @@
             and args[0]):
             args = args[0]
         self.args = args
+        self.kwargs = kwargs
         self.levelname = getLevelName(level)
         self.levelno = level
         self.pathname = pathname
@@ -1397,13 +1398,13 @@
         return rv
 
     def makeRecord(self, name, level, fn, lno, msg, args, exc_info,
-                   func=None, extra=None, sinfo=None):
+                   func=None, extra=None, sinfo=None, **kwargs):
         """
         A factory method which can be overridden in subclasses to create
         specialized LogRecords.
         """
         rv = _logRecordFactory(name, level, fn, lno, msg, args, exc_info, func,
-                             sinfo)
+                             sinfo, **kwargs)
         if extra is not None:
             for key in extra:
                 if (key in ["message", "asctime"]) or (key in rv.__dict__):
@@ -1411,7 +1412,8 @@
                 rv.__dict__[key] = extra[key]
         return rv
 
-    def _log(self, level, msg, args, exc_info=None, extra=None, stack_info=False):
+    def _log(self, level, msg, args, exc_info=None, extra=None, stack_info=False,
+             **kwargs):
         """
         Low-level logging routine which creates a LogRecord and then calls
         all the handlers of this logger to handle the record.
@@ -1433,7 +1435,7 @@
             elif not isinstance(exc_info, tuple):
                 exc_info = sys.exc_info()
         record = self.makeRecord(self.name, level, fn, lno, msg, args,
-                                 exc_info, func, extra, sinfo)
+                                 exc_info, func, extra, sinfo, **kwargs)
         self.handle(record)
 
     def handle(self, record):
diff -r 9485165435e4 Lib/test/test_logging.py
--- a/Lib/test/test_logging.py	Wed Sep 28 23:17:12 2016 -0700
+++ b/Lib/test/test_logging.py	Thu Sep 29 17:01:11 2016 +0100
@@ -4297,6 +4297,29 @@
         msg = 'Record not found in event log, went back %d records' % GO_BACK
         self.assertTrue(found, msg=msg)
 
+class RecordKwargTest(BaseTest):
+    """Test to check arbitrary kwargs can be attached to record, can be used to filter record"""
+    def filterfunc(self, record):
+        return record.kwargs.get('fish')
+
+    def test_record_kwargs_filterable(self):
+        handler = self.root_logger.handlers[0]
+        try:
+            handler.addFilter(self.filterfunc)
+            spam = logging.getLogger("spam")
+            spam_eggs = logging.getLogger("spam.eggs")
+
+            spam.info(self.next_message(), fish=True)
+            spam_eggs.info(self.next_message(), fish=True)
+            spam.info(self.next_message(), )
+            spam_eggs.info(self.next_message())
+
+            self.assert_log_lines([
+                ('spam', 'INFO', '1'),
+                ('spam.eggs', 'INFO', '2'),
+            ])
+        finally:
+            handler.removeFilter(self.filterfunc)
 
 class MiscTestCase(unittest.TestCase):
     def test__all__(self):