From f2d5869d8c83cf420fc29cecbefc42d2d2f65839 Mon Sep 17 00:00:00 2001
From: Michael Still <mikal@stillhq.com>
Date: Thu, 8 Nov 2012 12:12:30 +1100
Subject: Yield in between hash runs for the image cache manager.

This should stop the cache manager from locking up nova-compute for
long periods of time.

Change-Id: Icc510a55282b479b3ba673ac68aee793da1714fb
---
 nova/virt/libvirt/imagecache.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/nova/virt/libvirt/imagecache.py b/nova/virt/libvirt/imagecache.py
index 721587512..efc57eea5 100644
--- a/nova/virt/libvirt/imagecache.py
+++ b/nova/virt/libvirt/imagecache.py
@@ -313,6 +313,9 @@ 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]
-- 
cgit