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ublk-org / ublksrv

ublk: userspace block device driver
MIT License
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ublk-qcow2 work with kvm guests #45

Open ferodevil opened 1 year ago

ferodevil commented 1 year ago

just like https://static.sched.com/hosted_files/kvmforum2020/9c/KVMForum_2020_io_uring_passthrough_Stefano_Garzarella.pdf, make io_uring SQ/CQ ring share between ublk-qcow2 and virtio-blk driver, to make performace best

ming1 commented 1 year ago

Hello,

Can you explain a bit that this is one issue or improvement? Also I appreciate that you may provide more details.

Actually ublk-qcow2 has nothing in common with virtio-blk driver, not sure how to share io_uring. ublk-qcow2 backend is implemented totally in userspace with io_uring, and it does not use virtio-blk at all.

Thanks, Ming

ferodevil commented 1 year ago

hi,Ming

ublk-qcow2 or qemu-nbd used in host environment, and ublk-qcow2 result Better performance; how can it combine with qemu or virtual machine to make guest perform better?

  1. replace qemu qcow2 logic？
  2. just like spdk，share buffer with virtual machine？

Thanks

ming1 commented 1 year ago

ublk-qcow2 is supposed to be used in host environment(such as container, ...), and not for guest.