Avi Kivity wrote:
quoted text
> Early implementations of virtio devices did not support barrier operations,
> but did commit the data to disk.  In such cases, drain the queue to emulate
> barrier operations.

Are there any implementation currently that actually supports barriers?
As far as I remember there's no way to invoke barriers from a user-space
application on linux, and this is how kvm/qemu is running on this OS.

Thanks!

/mjt
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