Re: [LSF/MM/BPF TOPIC] Virtual Machine Memory Passthrough

["Gupta, Pankaj" <pankaj.gupta@amd.com>]

> Hello,
> 
> As a part of an ongoing work of replacing some containerized work load
> with virtual machines within Google, I have worked on making the
> memory translations faster.
> 
> I would like to propose the following topic for this year's LSF/MM/BPF:
> 
> Discuss  a set of techniques that can improve the guest performance,
> memory footprint overhead, observability, and manageability of virtual
> machines by hypervirtualizing the guest memory to the extreme. The end
> goal is to allow very lightweight virtual machines to be closer in
> performance to the containers.
> 
> The following items are going to be discussed in this topic:
> - Reducing the cost of SLAT page table translations.
> - Reducing the memory footprint overhead.

Coming from the virtio-pmem and some free page hinting background, I am
interested in this discussion. I saw your proposal about single owner 
memory driver in other thread and could not entirely link the dots about 
applicability of the idea with "reducing the memory footprint overhead 
for virtual machines". Do we plan to co-ordinate guest memory state with 
corresponding host state for efficient memory reclaim decisions?
Or something entirely different we are targeting here?

Thanks,
Pankaj

> - Reducing the memory management overhead.
> - Increasing the observability of guest memory.
>