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Date: Fri, 17 Oct 2014 17:46:59 +0200
From: Mikhail Sennikovskii <mikhail.sennikovskii@profitbricks.com>
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Subject: Re: [Qemu-devel] memory hotplug with 2.1.2
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To: qemu-devel@nongnu.org

Ah, just noticed there is a bug related to this: 
https://bugzilla.redhat.com/show_bug.cgi?id=1150930

Mikhail


On 17.10.2014 17:38, Mikhail Sennikovskii wrote:
> 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
>