netdev - Re: [PATCH net-next 11/11] net: remove default_device

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Date:   Mon, 7 Feb 2022 20:29:35 -0800
From:   David Ahern <dsahern@...il.com>
To:     Eric Dumazet <eric.dumazet@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev <netdev@...r.kernel.org>, David Ahern <dsahern@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>
Subject: Re: [PATCH net-next 11/11] net: remove default_device_exit()

On 2/7/22 9:17 AM, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@...gle.com>
> 
> For some reason default_device_ops kept two exit method:
> 
> 1) default_device_exit() is called for each netns being dismantled in
> a cleanup_net() round. This acquires rtnl for each invocation.
> 
> 2) default_device_exit_batch() is called once with the list of all netns
> int the batch, allowing for a single rtnl invocation.
> 
> Get rid of the .exit() method to handle the logic from
> default_device_exit_batch(), to decrease the number of rtnl acquisition
> to one.
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> ---
>  net/core/dev.c | 22 ++++++++++++++--------
>  1 file changed, 14 insertions(+), 8 deletions(-)
> 

Reviewed-by: David Ahern <dsahern@...nel.org>