diff --git a/lib/hypervisor/hv_chroot.py b/lib/hypervisor/hv_chroot.py
index 8b6ae8a617ab34496f0bcf297afb0e9458a0d06b..3830f5f6b2af6937521dfcacdb0f4bcb26c06202 100644
--- a/lib/hypervisor/hv_chroot.py
+++ b/lib/hypervisor/hv_chroot.py
@@ -233,6 +233,18 @@ class ChrootManager(hv_base.BaseHypervisor):
     raise HypervisorError("The chroot manager doesn't implement the"
                           " reboot functionality")
 
+  def BalloonInstanceMemory(self, instance, mem):
+    """Balloon an instance memory to a certain value.
+
+    @type instance: L{objects.Instance}
+    @param instance: instance to be accepted
+    @type mem: int
+    @param mem: actual memory size to use for instance runtime
+
+    """
+    # Currently chroots don't have memory limits
+    pass
+
   def GetNodeInfo(self):
     """Return information about the node.
 
diff --git a/lib/hypervisor/hv_lxc.py b/lib/hypervisor/hv_lxc.py
index ce9e55a43d64b9eeefc070fbb63a5f96e295090c..70e73846270f65bc351cd7baa0f40d0cd48f541b 100644
--- a/lib/hypervisor/hv_lxc.py
+++ b/lib/hypervisor/hv_lxc.py
@@ -361,6 +361,18 @@ class LXCHypervisor(hv_base.BaseHypervisor):
     raise HypervisorError("The LXC hypervisor doesn't implement the"
                           " reboot functionality")
 
+  def BalloonInstanceMemory(self, instance, mem):
+    """Balloon an instance memory to a certain value.
+
+    @type instance: L{objects.Instance}
+    @param instance: instance to be accepted
+    @type mem: int
+    @param mem: actual memory size to use for instance runtime
+
+    """
+    # Currently lxc instances don't have memory limits
+    pass
+
   def GetNodeInfo(self):
     """Return information about the node.