On 29/04/19 15:40, Stefan Hajnoczi wrote: > This isn't fully effective since the guest driver kicks once per > request. Therefore QEMU-level batching you mentioned only works if QEMU > is slower at handling virtqueue kicks than the guest is at submitting > requests. > > I wonder if this is something that can be improved.
Right, virtscsi_kick_cmd does limit notifications but not submissions. The SCSI layer does not have separate queue_rq and commit_rqs callbacks. That should not be too hard to fix though. Paolo
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