diff options
| -rw-r--r-- | nova/tests/test_libvirt.py | 6 | ||||
| -rw-r--r-- | nova/virt/libvirt/connection.py | 6 |
2 files changed, 12 insertions, 0 deletions
diff --git a/nova/tests/test_libvirt.py b/nova/tests/test_libvirt.py index 4eea7b0b3..b16f1060a 100644 --- a/nova/tests/test_libvirt.py +++ b/nova/tests/test_libvirt.py @@ -882,6 +882,12 @@ class LibvirtConnTestCase(test.TestCase): self.stubs.Set(os, 'open', os_open_stub) + def connection_supports_direct_io_stub(*args, **kwargs): + return directio_supported + + self.stubs.Set(connection.LibvirtConnection, + '_supports_direct_io', connection_supports_direct_io_stub) + user_context = context.RequestContext(self.user_id, self.project_id) instance_ref = db.instance_create(user_context, self.test_instance) network_info = _fake_network_info(self.stubs, 1) diff --git a/nova/virt/libvirt/connection.py b/nova/virt/libvirt/connection.py index ac286a768..d1a2d0bfa 100644 --- a/nova/virt/libvirt/connection.py +++ b/nova/virt/libvirt/connection.py @@ -984,7 +984,13 @@ class LibvirtConnection(driver.ComputeDriver): @staticmethod def _supports_direct_io(dirpath): + + if not hasattr(os, 'O_DIRECT'): + LOG.debug("This python runtime does not support direct I/O") + return False + testfile = os.path.join(dirpath, ".directio.test") + hasDirectIO = True try: f = os.open(testfile, os.O_CREAT | os.O_WRONLY | os.O_DIRECT) |