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news: Mention regression in virDomainBlockCopy with shallow+reuse flags

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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Kashyap Chamarthy <kchamart@redhat.com>
This commit is contained in:
Peter Krempa 2020-03-13 14:24:35 +01:00
parent c43969e164
commit 1cf2f412ed
1 changed files with 18 additions and 0 deletions
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docs/news.xml
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@ -48,6 +48,24 @@
<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 for QEMU storage configuration
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 quirky pre-blockdev behaviour this caused a
regression as the backing chain could not be modified while the copy
of the top image was progressing due to QEMU image locking. 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">