Re: [Xen-devel] [PATCH] Add support for netconsole driver used on bridge device with VIF attached

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Fri, May 03, 2013 at 10:11:10AM +0100, Ian Campbell wrote:
> On Wed, 2013-05-01 at 12:55 +0100, Yuval Shaia wrote:
> [... snip regurgitation of the thread...]
> > 0001-Add-support-for-netconsole-driver-used-on-bridge-dev.patch
> > 0 2001
> > From: Yuval <yuval.shaia@xxxxxxxxxx>
> > Date: Tue, 8 Jan 2013 10:08:45 +0200
> > Subject: [PATCH] Add support for netconsole driver used on bridge device 
> > with
> >  VIF attached
> 
> Sorry, but this is not what I was asking for.
> 
> Please submit with a coherent changelog based on (i.e. digested from)
> the previous discussion which explains why this change is necessary
> including the background of why it is being made in this way and the
> interaction with the bridging layer. I wasn't asking you to just cut and
> paste that discussion and prepend it to the commit like that.
> 
> The key point is that we don't think that doing netconsole from dom0 to
> a domU on the same host is a useful configuration or something which is
> especially desirable to support but that because of how the bridge
> handles netconsole netback needs to expose this hook in order that
> netconsole can be enabled via a physical device on the same bridge to a
> netserver elsewhere.

I would have thought that doing netconsole on a domU would be a worthwile
attempt - especially to troubleshoot a guest?

> 
> > 
> > Signed-off-by: Yuval <yuval.shaia@xxxxxxxxxx>
> > ---
> >  drivers/net/xen-netback/interface.c |    8 ++++++++
> >  1 file changed, 8 insertions(+)
> > 
> > diff --git a/drivers/net/xen-netback/interface.c \
> > b/drivers/net/xen-netback/interface.c index 601ae2a..10751f5 100644
> > --- a/drivers/net/xen-netback/interface.c
> > +++ b/drivers/net/xen-netback/interface.c
> > @@ -179,6 +179,13 @@ static u32 xenvif_fix_features(struct net_device *dev, 
> > u32 \
> > features)  return features;
> >  }
> >  
> > +static void xenvif_poll_controller(struct net_device *dev)
> > +{
> > +   disable_irq(dev->irq);
> > +   xenvif_interrupt(dev->irq, dev);
> > +   enable_irq(dev->irq);
> > +}
> > +
> >  static const struct xenvif_stat {
> >     char name[ETH_GSTRING_LEN];
> >     u16 offset;
> > @@ -237,6 +244,7 @@ static const struct net_device_ops xenvif_netdev_ops = {
> >     .ndo_stop       = xenvif_close,
> >     .ndo_change_mtu = xenvif_change_mtu,
> >     .ndo_fix_features = xenvif_fix_features,
> > +   .ndo_poll_controller = xenvif_poll_controller,
> >  };
> >  
> >  struct xenvif *xenvif_alloc(struct device *parent, domid_t domid,
> 
> 
> 
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