Looks like <shareable/> within <disk> has no effect. I ran virsh
dumpxml, inserted the <shareable/>, redefined the domain, and ran
virsh dumpxml again. No shareable. I even ran virsh undefine and
virsh define again, same thing.
XML and output of xm list --long for this guest attached.
<domain type='xen'>
<name>rhel5pv</name>
<uuid>49a0c6ffc066539264983632d093c2e7</uuid>
<bootloader>/usr/bin/pygrub</bootloader>
<os>
<type>linux</type>
<kernel>/var/lib/xen/boot_kernel.BCkYBN</kernel>
<initrd>/var/lib/xen/boot_ramdisk.sjOK9_</initrd>
<cmdline>ro root=/dev/VolGroup00/LogVol00</cmdline>
</os>
<currentMemory>393216</currentMemory>
<memory>524288</memory>
<vcpu>1</vcpu>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<disk type='file' device='disk'>
<driver name='tap' type='aio'/>
<source file='/var/lib/xen/images/rhel5pv.img'/>
<target dev='xvda'/>
<shareable/>
</disk>
<interface type='bridge'>
<mac address='00:16:3e:23:9e:eb'/>
<source bridge='xenbr0'/>
<script path='vif-bridge'/>
</interface>
<interface type='bridge'>
<mac address='00:16:3e:23:9e:eb'/>
<source bridge='xenbr0'/>
<script path='vif-bridge'/>
</interface>
<graphics type='vnc' port='-1' keymap='en-us'/>
<console/>
</devices>
</domain>
(domain
(domid 1)
(uuid 49a0c6ff-c066-5392-6498-3632d093c2e7)
(vcpus 1)
(cpu_weight 1.0)
(memory 384)
(shadow_memory 0)
(maxmem 512)
(bootloader /usr/bin/pygrub)
(features )
(name rhel5pv)
(on_poweroff destroy)
(on_reboot restart)
(on_crash restart)
(image
(linux
(kernel /var/lib/xen/boot_kernel.c9hdO-)
(ramdisk /var/lib/xen/boot_ramdisk.biuRMa)
(args 'ro root=/dev/VolGroup00/LogVol00')
)
)
(device
(vif
(backend 0)
(script vif-bridge)
(bridge xenbr0)
(mac 00:16:3e:23:9e:eb)
)
)
(device
(vif
(backend 0)
(script vif-bridge)
(bridge xenbr0)
(mac 00:16:3e:23:9e:eb)
)
)
(device (vkbd (backend 0)))
(device (vfb (backend 0) (type vnc) (vncunused 1) (keymap en-us)))
(device
(tap
(backend 0)
(dev xvda:disk)
(uname tap:aio:/var/lib/xen/images/rhel5pv.img)
(mode w)
)
)
(state -b----)
(shutdown_reason poweroff)
(cpu_time 16.260877279)
(online_vcpus 1)
(up_time 418.871421099)
(start_time 1195062949.41)
(store_mfn 1329201)
(console_mfn 1329200)
)
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