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Seems that after dimm hot-add migration is impossible:
Initial configuration follows
<qemu:commandline>
<qemu:arg value='-device'/>
<qemu:arg value='dimm,id=dimm0,size=256M,node=0,populated=on,bus=membus.0'/>
<qemu:arg value='-device'/>
<qemu:arg value='dimm,id=dimm1,size=256M,node=0,populated=off,bus=membus.0'/>
<qemu:arg value='-device'/>
<qemu:arg value='dimm,id=dimm2,size=256M,node=0,populated=off,bus=membus.0'/>
<qemu:arg value='-device'/>
<qemu:arg value='dimm,id=dimm3,size=256M,node=0,populated=off,bus=membus.0'/>
<qemu:arg value='-device'/>
<qemu:arg value='dimm,id=dimm4,size=256M,node=0,populated=off,bus=membus.0'/>
<qemu:arg value='-device'/>
<qemu:arg value='dimm,id=dimm5,size=256M,node=0,populated=off,bus=membus.0'/>
<qemu:arg value='-device'/>
<qemu:arg value='dimm,id=dimm6,size=256M,node=0,populated=off,bus=membus.0'/>
</qemu:commandline>
and migration works just fine. After executing
qemu-monitor-command --hmp vm010-000-001-005 device_add dimm,id=dimm1,populated=on,bus=membus.0
migration doesn`t work anymore:
Unknown ramblock "dimm1", cannot accept migration
qemu: warning: error while loading state for instance 0x0 of device 'ram'
load of migration failed
This happens on memhpv4 4a80517
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