Comment # 11 on bug 1193019 from Dario Faggioli

(In reply to Michiya Hagimoto from comment #10)
> Today, try to ZFS setting and Libvirt xml seting change.
> 
> cache='none'->cache='wirteback' : NG same IO error.
> io='io_uring'->io='native' : NG same IO error.
> ZFS ARC(cache) setting change : NG same IO error.
> 
> I think it is QEMU block device driver(virtio) error?
>
Well, yes, it could be. TBH, io_uring on top of ZFS (and on a not super new
software stack such as the one in Leap) is not a configuration I'm familiar
with, and I'm quite sure it's not used/tested that often.

Now, the experiments above show that probably io_uring is not among the causes,
as you have the problem even without it.

It could be QEMU but I guess it could even be BTRFS (or kernel in general)
inside the guest, maybe due to how they interact with ZFS (which I really don't
know much about).

In fact, you mention that other distros with different filesystems work fine,
right? And QEMU is the same among all of them, isn't it?