vhost-net todo list

Michael S. Tsirkin
2009-09-16T10:04:38Z

Some people asked about getting involved with vhost.

Here's a short list of projects.

vhost-net driver projects
- profiling would be very helpful, I have not done any yet
- tap support - working on it now
- merged buffers - working on it now
- scalability/fairness for large # of guests - working on it now
- logging support with dirty page tracking in kernel - working on it now
- indirect buffers - worth it?
- vm exit mitigation for TX (worth it?
  naive implementation does not seem to help)
- interrupt mitigation for RX
- level triggered interrupts - what's the best thing
  to do here?

qemu projects
- migration support
- level triggered interrupts - what's the best thing
  to do here?
- upstream support for injecting interrupts from kernel,
  from qemu-kvm.git to qemu.git
  (this is a vhost dependency, without it vhost
   can't be upstreamed, or it can, but without real benefit)
- general cleanup and upstreaming

projects involing networking stack
- export socket from tap so vhost can use it - working on it now
- extend raw sockets to support GSO/checksum offloading,
  and teach vhost to use that capability
  [one way to do this: virtio net header support]
  will allow working with e.g. macvlan

long term projects
- multiqueue (involves all of vhost, qemu, virtio,
  networking stack)

- More testing is always good

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MST