linux-kernel - Re: [PATCH net-next 2/2] net/vsockmon: Do not set zeroed statistics

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Message-ID: <CAL+tcoA=FVBJi2eJgAELhWG_f+N-kwmrHc+XRfKXhYk2RJcPKg@mail.gmail.com>
Date: Mon, 26 Feb 2024 17:27:27 +0800
From: Jason Xing <kerneljasonxing@...il.com>
To: Breno Leitao <leitao@...ian.org>
Cc: kuba@...nel.org, davem@...emloft.net, pabeni@...hat.com, 
	edumazet@...gle.com, Stefano Garzarella <sgarzare@...hat.com>, netdev@...r.kernel.org, 
	linux-kernel@...r.kernel.org, horms@...nel.org, 
	"open list:VM SOCKETS (AF_VSOCK)" <virtualization@...ts.linux.dev>
Subject: Re: [PATCH net-next 2/2] net/vsockmon: Do not set zeroed statistics

On Fri, Feb 23, 2024 at 7:59 PM Breno Leitao <leitao@...ian.org> wrote:
>
> Do not set rtnl_link_stats64 fields to zero, since they are zeroed
> before ops->ndo_get_stats64 is called in core dev_get_stats() function.
>
> Signed-off-by: Breno Leitao <leitao@...ian.org>

Reviewed-by: Jason Xing <kerneljasonxing@...il.com>

Another similar codes that also can be changed later go like this:

diff --git a/drivers/net/nlmon.c b/drivers/net/nlmon.c
index 5e19a6839dea..9b205b152734 100644
--- a/drivers/net/nlmon.c
+++ b/drivers/net/nlmon.c
@@ -56,10 +56,8 @@ nlmon_get_stats64(struct net_device *dev, struct
rtnl_link_stats64 *stats)
        dev_lstats_read(dev, &packets, &bytes);

        stats->rx_packets = packets;
-       stats->tx_packets = 0;

        stats->rx_bytes = bytes;
-       stats->tx_bytes = 0;
 }

 static u32 always_on(struct net_device *dev)

> ---
>  drivers/net/vsockmon.c | 3 ---
>  1 file changed, 3 deletions(-)
>
> diff --git a/drivers/net/vsockmon.c b/drivers/net/vsockmon.c
> index a0b4dca36baf..a1ba5169ed5d 100644
> --- a/drivers/net/vsockmon.c
> +++ b/drivers/net/vsockmon.c
> @@ -46,9 +46,6 @@ static void
>  vsockmon_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
>  {
>         dev_lstats_read(dev, &stats->rx_packets, &stats->rx_bytes);
> -
> -       stats->tx_packets = 0;
> -       stats->tx_bytes = 0;
>  }
>
>  static int vsockmon_is_valid_mtu(int new_mtu)
> --
> 2.39.3
>
>