Re: [Xen-devel] [PATCH] xen: netback: remove redundant xenvif_put

[Andrew Jones]

On Tue, 19 Feb 2013 08:03:49 +0000
"Jan Beulich" <JBeulich@xxxxxxxx> wrote:

> >>> On 19.02.13 at 06:53, David Miller <davem@xxxxxxxxxxxxx> wrote:
> > From: Andrew Jones <drjones@xxxxxxxxxx>
> > Date: Mon, 18 Feb 2013 21:29:20 +0100
> > 
> >> netbk_fatal_tx_err() calls xenvif_carrier_off(), which does
> >> a xenvif_put(). As callers of netbk_fatal_tx_err should only
> >> have one reference to the vif at this time, then the xenvif_put
> >> in netbk_fatal_tx_err is one too many.
> >> 
> >> Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx>
> > 
> > Applied.
> 
> But this is wrong from all we can tell, we discussed this before
> (Wei pointed to the discussion in an earlier reply). The core of
> it is that the put here parallels the one in netbk_tx_err(), and
> the one in xenvif_carrier_off() matches the get from
> xenvif_connect() (which normally would be done on the path
> coming through xenvif_disconnect()).

I see the balance described by Ian in [1] now. Sorry that I missed
that previous discussion and generated this noise.

[1] http://marc.info/?l=xen-devel&m=136084174026977&w=2

drew

> 
> And anyway - shouldn't changes to netback require an ack from
> Ian?
> 
> Jan
> 

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