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Steps to reproduce this bug: 1. # cat net.xml # 00:03.0 has been used <interface type='network'> <mac address='52:54:00:04:72:f3'/> <source network='default'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> 2. # virsh attach-device vm1 net.xml error: Failed to attach device from net.xml error: internal error unable to reserve PCI address 0:0:3 3. # virsh attach-device vm1 net.xml error: Failed to attach device from net.xml error: internal error unable to execute QEMU command 'device_add': Device 'rtl8139' could not be initialized The reason of this bug is that: we can not reserve PCI address 0:0:3 because it has been used, but we release PCI address when we reserve it failed.
LibVirt : simple API for virtualization Libvirt is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes). It is free software available under the GNU Lesser General Public License. Virtualization of the Linux Operating System means the ability to run multiple instances of Operating Systems concurrently on a single hardware system where the basic resources are driven by a Linux instance. The library aim at providing long term stable C API initially for the Xen paravirtualization but should be able to integrate other virtualization mechanisms if needed. Daniel Veillard <veillard@redhat.com>
Description
Libvirt provides a portable, long term stable C API for managing the
virtualization technologies provided by many operating systems. It
includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware
vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER
Hypervisor.
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