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

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Message-ID: <429a1196-b1a1-42ff-4dbb-b3e1b35c6652@redhat.com>
Date:   Thu, 11 Oct 2018 17:47:19 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     David Miller <davem@...emloft.net>
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



On 2018年10月11日 13:34, David Miller wrote:
> 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.

My bad, thanks for the fixup.