Re: ublk-qcow2: ublk-qcow2 is available

On Thu, 6 Oct 2022 at 06:14, Richard W.M. Jones [off-list ref] wrote:

On Tue, Oct 04, 2022 at 09:53:32AM -0400, Stefan Hajnoczi wrote:

quoted

qemu-nbd doesn't use io_uring to handle the backend IO,

Would this be fixed by your (not yet upstream) libblkio driver for
qemu?

I was wrong, qemu-nbd has syntax to use io_uring:

  $ qemu-nbd ... --image-opts driver=file,filename=test.img,aio=io_uring

The new libblkio driver will also support io_uring, but QEMU's
built-in io_uring support is already available and can be used as
shown above.

Stefan