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NEWS: Mention device hot-unplug regression with qemu-6.2 and workarounds for it

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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ani Sinha <ani@anisinha.ca>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
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Peter Krempa 2022-01-03 16:17:30 +01:00
parent bd3d00babc
commit ad37e05e26
1 changed files with 31 additions and 0 deletions
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NEWS.rst
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@ -59,6 +59,37 @@ v8.0.0 (unreleased)
* **Bug fixes**
* qemu: Fix device hot-unplug with ``libvirt-7.9`` or ``libvirt-7.10`` used with ``qemu-6.2``
An internal change to the configuration format used by the above libvirt
versions triggers a bug in ``qemu-6.2`` where qemu no longer emits the
event notifying that the device was unplugged successfully and thus libvirt
never removes the device from the definition.
This impacts only devices which were present at startup of the VM, hotplugged
devices behave correctly.
This is fixed in ``libvirt-8.0`` by reverting to the old configuration
approach until qemu is fixed.
As a workaround for ``libvirt-7.9`` and ``libvirt-7.10`` the old configuration
approach can be forced by:
Option 1, global ``qemu.conf``::
capability_filters = [ "device.json" ]
Option 2, per VM XML override::
<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
[...]
<qemu:capabilities>
<qemu:del capability='device.json'/>
</qemu:capabilities>
</domain>
v7.10.0 (2021-12-01)
====================