On Fri, May 26, 2023, Sean Christopherson wrote: > On Fri, May 26, 2023, James Gowans wrote: > > On Tue, 2023-05-09 at 11:55 +0200, Paolo Bonzini wrote: > > > Hi all! > > > > > > We are planning on submitting a CFP to host a KVM Microconference at > > > Linux Plumbers Conference 2023. To help justify the proposal, we would > > > like to gather a list of folks that would likely attend, and crowdsource > > > a list of topics to include in the proposal. > > > > Hi Paolo, > > > > This MC sounds great! There are two topics I'd be keen to discuss, both in > > the KVM + memory-management realm: > > > > 1. Guest and kernel memory persistence across kexec for live update. > > Specifically focussing on the host IOMMU pgtable persistence for DMA- > > passthrough devices to support kexec while guest-driven DMA is still > > running. There is some discussion happening now about this [1] and > > hopefully the discussion and prototyping will continue in the run up to > > LPC. > > I don't think a KVM MC conference would be the right venue for this discussion. > IIUC, KVM does not need to be involved in preserving guest memory or the IOMMU > page tables. Ah, I assume the KVM involvement comes from a potentially new filesystem for guest memory? 5. More "advanced" memory management APIs/ioctls for virtualisation: Being able to support things like DMA-driven post-copy live migration, memory oversubscription, carving out chunks of memory from a VM to launch side- car VMs, more fine-grain control of IOMMU or MMU permissions, etc. This may be easier to achieve with a new filesystem, rather than coupling to tempfs semantics and ioctls.
