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

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Date:   Wed, 10 Oct 2018 22:34:58 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     jasowang@...hat.com
Cc:     mst@...hat.com, virtualization@...ts.linux-foundation.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        willemb@...gle.com
Subject: Re: [PATCH net-next V3] virtio_net: ethtool tx napi configuration

From: Jason Wang <jasowang@...hat.com>
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@...hat.com>
> Signed-off-by: Willem de Bruijn <willemb@...gle.com>
> Signed-off-by: Jason Wang <jasowang@...hat.com>
> ---
> 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.