diff --git a/ansible_mitogen/target.py b/ansible_mitogen/target.py
index 20086cec..d6a44f4d 100644
--- a/ansible_mitogen/target.py
+++ b/ansible_mitogen/target.py
@@ -78,6 +78,7 @@ def get_file(context, path):
         Bytestring file data.
     """
     if path not in _file_cache:
+        LOG.debug('target.get_file(): fetching %r from %r', path, context)
         _file_cache[path] = zlib.decompress(
             mitogen.service.call(
                 context=context,
@@ -88,6 +89,7 @@ def get_file(context, path):
                 }
             )
         )
+        LOG.debug('target.get_file(): fetched %r from %r', path, context)
 
     return _file_cache[path]
 
diff --git a/mitogen/service.py b/mitogen/service.py
index 23848b24..9c33202c 100644
--- a/mitogen/service.py
+++ b/mitogen/service.py
@@ -341,6 +341,8 @@ class Pool(object):
 
 
 def call_async(context, handle, method, kwargs):
+    LOG.debug('service.call_async(%r, %r, %r, %r)',
+              context, handle, method, kwargs)
     pair = (method, kwargs)
     msg = mitogen.core.Message.pickled(pair, handle=handle)
     return context.send_async(msg)