[libvirt] [RFC] memory settings interface for containers

[Daniel P. Berrange]

On Fri, Nov 13, 2015 at 01:55:15PM +0300, Dmitry Guryanov wrote:
> On Thu, 2015-11-12 at 11:11 +0300, Nikolay Shirokovskiy wrote:
> > Hi, everyone.
> > 
> > I plan to add means to configure vz containers memory setting and have trouble
> > getting it done thru libvirt interface. Looks like current interface fits good
> > for vm memory managment but its not clear how to use it with containers. First
> > let's take aside memory hotplugging which is obviously not suitable for
> > containers. Then memory interface is represented by 2 parameters: total_memory
> > and cur_balloon. For VMs total_memory can't be changed at runtime, cur_ballon
> > can't be greater than total_memory. But for containers memory model is
> > different. We have only one parameter and it can be changed for running 
> > domains.
> 
> Not only one parameter, there are a lot of parameters, that can be tuned with
> memory cgroup. But at least physical pages limit (memory.limit_in_bytes) and
> swap pages (memory.memsw.limit_in_bytes) have sense.

The memory.limit_in_bytes maps to the current max memory limit.

For LXC we also support setting the soft limit and swap limit


Regards,
Daniel
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