[libvirt] [PATCH 0/8] logically memory hotplug via guest agent

[Daniel P. Berrange]

On Wed, Jun 10, 2015 at 05:24:50PM +0800, zhang bo wrote:
> On 2015/6/10 16:39, Vasiliy Tolstov wrote:
> 
> > 2015-06-10 11:37 GMT+03:00 Daniel P. Berrange <berrange at redhat.com>:
> >> The udev rules are really something the OS vendor should setup, so
> >> that it "just works"
> > 
> > 
> > I think so, also for vcpu hotplug this also covered by udev. May be we
> > need something to hot remove memory and cpu, because in guest we need
> > offline firstly.
> > 
> 
> 
> In fact ,we also have --guest option for 'virsh sevvcpus' command, which also
> uses qga commands to do the logical hotplug/unplug jobs, although udev rules seems
> to cover the vcpu logical hotplug issue.
> 
> virsh # help setvcpus
> .........................
>     --guest          modify cpu state in the guest
> 
> 
> BTW: we didn't see OSes with udev rules for memory-hotplug-event setted by vendors, 
> and adding such rules means that we have to *interfere within the guest*, It seems 
> not a good option.

I was suggesting that an RFE be filed with any vendor who doesn't do it
to add this capability, not that we add udev rules ourselves.

Regards,
Daniel
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