[PATCH] news: Mention regression in virDomainBlockCopy with shallow/reuse flags

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Signed-off-by: Peter Krempa <pkrempa@xxxxxxxxxx>
---
 docs/news.xml | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/docs/news.xml b/docs/news.xml
index 7fd88f9998..92103ec308 100644
--- a/docs/news.xml
+++ b/docs/news.xml
@@ -48,6 +48,23 @@
     <section title="Improvements">
     </section>
     <section title="Bug fixes">
+      <change>
+        <summary>
+          qemu: Open backing chain late for shallow block copy reusing external images
+        </summary>
+        <description>
+          With introduction of -blockdev specification of storage for qemu VMs
+          in libvirt-5.10 we've started opening the backing chain of the
+          destination/mirror of a virDomainBlockcopy started with
+          VIR_DOMAIN_BLOCK_COPY_REUSE_EXT | VIR_DOMAIN_BLOCK_COPY_SHALLOW flags
+          when starting the job rather than when virDomainBlockJobAbort with
+          VIR_DOMAIN_BLOCK_JOB_ABORT_PIVOT is issued. For users depending on
+          this undocumented quirk this caused a regression in behaviour as
+          the backing chain could not be modified while the copy of the top
+          image was progressing. Note that this fix also requires qemu-5.0 while
+          -blockdev is used starting from qemu-4.2.
+        </description>
+      </change>
     </section>
   </release>
   <release version="v6.1.0" date="2020-03-03">
-- 
2.24.1





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