netdev - Re: [PATCH net-next v7 3/3] net: add sysfs attribute to control napi threaded mode

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Date:   Wed, 20 Jan 2021 10:07:34 -0800
From:   Wei Wang <weiwan@...gle.com>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     David Miller <davem@...emloft.net>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Jakub Kicinski <kuba@...nel.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 v7 3/3] net: add sysfs attribute to control napi
 threaded mode

On Wed, Jan 20, 2021 at 9:29 AM Florian Fainelli <f.fainelli@...il.com> wrote:
>
>
>
> On 1/19/2021 7:34 PM, Wei Wang wrote:
> > This patch adds a new sysfs attribute to the network device class.
> > Said attribute provides a per-device control to enable/disable the
> > threaded mode for all the napi instances of the given network device.
> > User sets it to 1 or 0 to enable or disable threaded mode per device.
> > However, when user reads from this sysfs entry, it could return:
> >   1: means all napi instances belonging to this device have threaded
> > mode enabled.
> >   0: means all napi instances belonging to this device have threaded
> > mode disabled.
> >   -1: means the system fails to enable threaded mode for certain napi
> > instances when user requests to enable threaded mode. This happens
> > when the kthread fails to be created for certain napi instances.
> >
> > 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: Felix Fietkau <nbd@....name>
> > Signed-off-by: Felix Fietkau <nbd@....name>
> > Signed-off-by: Wei Wang <weiwan@...gle.com>
>
> Can you document the new threaded sysfs attribute under
> Documentation/ABI/testing/sysfs-class-net?
OK. Will do.


> --
> Florian