Re: [PATCH net-next V3] virtio_net: ethtool tx napi configuration

From: Jason Wang
Date: Thu Oct 11 2018 - 05:47:36 EST




On 2018å10æ11æ 13:34, David Miller wrote:
From: Jason Wang <jasowang@xxxxxxxxxx>
Date: Tue, 9 Oct 2018 10:06:26 +0800

Implement ethtool .set_coalesce (-C) and .get_coalesce (-c) handlers.
Interrupt moderation is currently not supported, so these accept and
display the default settings of 0 usec and 1 frame.

Toggle tx napi through setting tx-frames. So as to not interfere
with possible future interrupt moderation, value 1 means tx napi while
value 0 means not.

Only allow the switching when device is down for simplicity.

Link: https://patchwork.ozlabs.org/patch/948149/
Suggested-by: Jason Wang <jasowang@xxxxxxxxxx>
Signed-off-by: Willem de Bruijn <willemb@xxxxxxxxxx>
Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
---
Changes from V2:
- only allow the switching when device is done
- remove unnecessary global variable and initialization
Changes from V1:
- try to synchronize with datapath to allow changing mode when
interface is up.
- use tx-frames 0 as to disable tx napi while tx-frames 1 to enable tx napi
Applied, with...

+ bool running = netif_running(dev);
this unused variable removed.

My bad, thanks for the fixup.