Re: [PATCH RFC net-next 0/2] drivers: net: virtio_net: Implement
From: Julio Faracco
Date: Mon Oct 07 2019 - 09:58:43 EST
Em seg, 7 de out de 2019 Ãs 04:43, Michael S. Tsirkin <mst@xxxxxxxxxx> escreveu:
>
> On Sun, Oct 06, 2019 at 03:45:13PM -0300, jcfaracco@xxxxxxxxx wrote:
> > From: Julio Faracco <jcfaracco@xxxxxxxxx>
> >
> > Driver virtio_net is not handling error events for TX provided by
> > dev_watchdog. This event is reached when transmission queue is having
> > problems to transmit packets. To enable it, driver should have
> > .ndo_tx_timeout implemented. This serie has two commits:
> >
> > In the past, we implemented a function to recover driver state when this
> > kind of event happens, but the structure was to complex for virtio_net
> > that moment.
>
> It's more that it was missing a bunch of locks.
Actually, we submitted this patch as a RFC to understand the community
perspective about this missing feature:
Complexity versus performance versus solution.
>
> > Alternativelly, this skeleton should be enough for now.
> >
> > For further details, see thread:
> > https://lkml.org/lkml/2015/6/23/691
> >
> > Patch 1/2:
> > Add statistic field for TX timeout events.
> >
> > Patch 2/2:
> > Implement a skeleton function to debug TX timeout events.
> >
> > Julio Faracco (2):
> > drivers: net: virtio_net: Add tx_timeout stats field
> > drivers: net: virtio_net: Add tx_timeout function
> >
> > drivers/net/virtio_net.c | 33 ++++++++++++++++++++++++++++++++-
> > 1 file changed, 32 insertions(+), 1 deletion(-)
> >
> > --
> > 2.21.0