Re: [Qemu-devel] [dpdk-dev] [PATCH v4 00/10] VM Power Management

[Vincent JARDIN]

Tim,

cc-ing Paolo and qemu-devel@ again in order to get their take on it.

> > > Did you make any progress in Qemu/KVM community?
> > > We need to be sync'ed up with them to be sure we share the same goal.
> > > I want also to avoid using a solution which doesn't fit with their plan.
> > > Remember that we already had this problem with ivshmem which was
> > > planned to be dropped.

> > Unfortunately, I have not yet received any feedback:
> > http://lists.nongnu.org/archive/html/qemu-devel/2014-11/msg01103.html
>
> Just to add to what Alan said above, this capability does not exist in qemu at 
> the moment, and based on there having been no feedback on the qemu mailing list 
> so far, I think it's reasonable to assume that it will not be implemented in 
> the immediate future. The VM Power Management feature has also been designed to 
> allow easy migration to a qemu-based solution when this is supported in future. 
> Therefore, I'd be in favour of accepting this feature into DPDK now.
>
> It's true that the implementation is a work-around, but there have been similar 
> cases in DPDK in the past. One recent example that comes to mind is userspace 
> vhost. The original implementation could also be considered a work-around, but 
> it met the needs of many in the community. Now, with support for vhost-user in 
> qemu 2.1, that implementation is being improved. I'd see VM Power Management 
> following a similar path when this capability is supported in qemu.

Best regards,
  Vincent