Do not use qmemman when not present (installed) on particular VMM

core-modules/000QubesVm.py

@@ -44,7 +44,12 @@ from qubes.qubes import dry_run,vmm
 from qubes.qubes import register_qubes_vm_class
 from qubes.qubes import QubesVmCollection,QubesException,QubesHost,QubesVmLabels
 from qubes.qubes import defaults,system_path,vm_files,qubes_max_qid
+qmemman_present = False
+try:
     from qubes.qmemman_client import QMemmanClient
+    qmemman_present = True
+except ImportError:
+    pass
 
 import qubes.qubesutils
 
@@ -968,9 +973,9 @@ class QubesVm(object):
 
         self.qdb.write("/qubes-debug-mode", str(int(self.debug)))
 
-        # Fix permissions
         # TODO: Currently whole qmemman is quite Xen-specific, so stay with
         # xenstore for it until decided otherwise
+        if qmemman_present:
             vmm.xs.set_permissions('', '/local/domain/{0}/memory'.format(self.xid),
                     [{ 'dom': xid }])
 
@@ -1730,6 +1735,7 @@ class QubesVm(object):
 
         if mem_required is None:
             mem_required = int(self.memory) * 1024 * 1024
+        if qmemman_present:
             qmemman_client = QMemmanClient()
             try:
                 got_memory = qmemman_client.request_memory(mem_required)
@@ -1783,6 +1789,7 @@ class QubesVm(object):
 # constructing the domain after its main process exits
 # so we close() when we know the domain is up
 # the successful unpause is some indicator of it
+        if qmemman_present:
             qmemman_client.close()
 
         if self._start_guid_first and start_guid and not preparing_dvm and os.path.exists('/var/run/shm.id'):

core-modules/01QubesDisposableVm.py

@@ -29,7 +29,12 @@ import time
 from qubes.qubes import QubesVm,QubesVmLabel,register_qubes_vm_class
 from qubes.qubes import QubesDispVmLabels
 from qubes.qubes import dry_run,vmm
+qmemman_present = False
+try:
     from qubes.qmemman_client import QMemmanClient
+    qmemman_present = True
+except ImportError:
+    pass
 
 class QubesDisposableVm(QubesVm):
     """
@@ -130,6 +135,7 @@ class QubesDisposableVm(QubesVm):
         # refresh config file
         domain_config = self.create_config_file()
 
+        if qmemman_present:
             mem_required = int(self.memory) * 1024 * 1024
             print >>sys.stderr, "time=%s, getting %d memory" % (str(time.time()), mem_required)
             qmemman_client = QMemmanClient()
@@ -175,6 +181,7 @@ class QubesDisposableVm(QubesVm):
 # constructing the domain after its main process exits
 # so we close() when we know the domain is up
 # the successful unpause is some indicator of it
+        if qmemman_present:
             qmemman_client.close()
 
         if self._start_guid_first and kwargs.get('start_guid', True) and os.path.exists('/var/run/shm.id'):