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-rw-r--r--nova/virt/libvirt/imagecache.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/nova/virt/libvirt/imagecache.py b/nova/virt/libvirt/imagecache.py
index 793044477..7256dcdb0 100644
--- a/nova/virt/libvirt/imagecache.py
+++ b/nova/virt/libvirt/imagecache.py
@@ -311,6 +311,9 @@ class ImageCacheManager(object):
if not checksum_result is None:
image_bad = not checksum_result
+ # Give other threads a chance to run
+ time.sleep(0)
+
instances = []
if img_id in self.used_images:
local, remote, instances = self.used_images[img_id]