linux-kernel - Re: [PATCH net-next v2] drivers: net: virtio_net: Implement a dev

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Date:   Sun, 24 Nov 2019 05:52:02 -0500
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Julio Faracco <jcfaracco@...il.com>
Cc:     netdev@...r.kernel.org, Daiane Mendes <dnmendes76@...il.com>,
        Jason Wang <jasowang@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2] drivers: net: virtio_net: Implement a
 dev_watchdog handler

On Sat, Nov 23, 2019 at 08:33:40PM -0200, Julio Faracco wrote:
> >
> > netdev: pass the stuck queue to the timeout handler
> >
> > This allows incrementing the correct timeout statistic without any mess.
> > Down the road, devices can learn to reset just the specific queue.
> >
> > Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> > ---
> > Warning: untested.
> >
> 
> Question...
> Wouldn't be better to create a module parameter instead change the
> function scope?

Passing the value in a global variable? That fails to be reentrant ...

> I'm asking it because how many modules would effectively take advantage of it?

The cost is effectively 0 though.

-- 
MST