Re: [virtio-comment] [PATCH v2] Introduction of Virtio Network device notifications coalescing feature

[Alvaro Karsz <alvaro.karsz@solid-run.com>]

> This reasoning applies to rx but not tx. It would be fine to disable the
> timer since the driver controls tx buffer submission.

I'm not sure I understand why this can't happen in TX.
Assume the following situation:
tx-max-frames is 10.
The driver wants to send 5 packets (ideal case, every packet is small
enough to fit in one buffer), then no more packets to send for a long
time.

If event suppression isn't on, the driver won't know that the
descriptors were used by device, since the device won't interrupt the
driver.
I'm assuming that the driver won't check the descriptor flags without
being interrupted, which seems like a "good" behaviour when event
suppression isn't on.

Am I missing something?


Alvaro