[Qemu-devel] memory hotplug with 2.1.2

[Mikhail Sennikovskii <mikhail.sennikovskii@profitbricks.com>]

Hi all,

Trying to hotplug RAM with qemu 2.1.2 using

object_add memory-backend-ram,id=ram1,size=128M
device_add pc-dimm,id=dimm1,memdev=ram1

gives the following error:
{{{
'DIMM property node has value 0' which exceeds the number of numa nodes: 0
Device 'pc-dimm' could not be initialized
}}}

which goes away if I add a "dummy" numa node via command line at VM 
creation  -numa node,nodeid=0

This behavior was introduced by the commit 
9a72433843d912a45046959b1953861211d1838d, and disabling the check makes 
the hotplug work again for me.

Is this a regression, or just some memory hotplug semantic change? And 
in the latter case, could you specify the proper semantic I should use?

Thanks,
Mikhail