netdev - Re: [PATCH net-next v8 2/3] net: implement threaded-able napi poll loop support

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Message-ID: <20210127161238.123840ec@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Wed, 27 Jan 2021 16:12:38 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Wei Wang <weiwan@...gle.com>
Cc:     David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Hannes Frederic Sowa <hannes@...essinduktion.org>,
        Felix Fietkau <nbd@....name>,
        Alexander Duyck <alexander.duyck@...il.com>
Subject: Re: [PATCH net-next v8 2/3] net: implement threaded-able napi poll
 loop support

On Mon, 25 Jan 2021 17:11:08 -0800 Wei Wang wrote:
> This patch allows running each napi poll loop inside its own
> kernel thread.
> The kthread is created during netif_napi_add() if dev->threaded
> is set. And threaded mode is enabled in napi_enable(). We will
> provide a way to set dev->threaded and enable threaded mode
> without a device up/down in the following patch.
> 
> Once that threaded mode is enabled and the kthread is
> started, napi_schedule() will wake-up such thread instead
> of scheduling the softirq.
> 
> The threaded poll loop behaves quite likely the net_rx_action,
> but it does not have to manipulate local irqs and uses
> an explicit scheduling point based on netdev_budget.
> 
> Co-developed-by: Paolo Abeni <pabeni@...hat.com>
> Signed-off-by: Paolo Abeni <pabeni@...hat.com>
> Co-developed-by: Hannes Frederic Sowa <hannes@...essinduktion.org>
> Signed-off-by: Hannes Frederic Sowa <hannes@...essinduktion.org>
> Co-developed-by: Jakub Kicinski <kuba@...nel.org>
> Signed-off-by: Jakub Kicinski <kuba@...nel.org>
> Signed-off-by: Wei Wang <weiwan@...gle.com>

include/linux/netdevice.h:2150: warning: Function parameter or member 'threaded' not described in 'net_device'


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