Re: [PATCH] ftrace: tracepoint of net_dev_xmit sees freed skb andcauses panic

[Steven Rostedt]

On Tue, 2011-05-31 at 12:11 -0400, Neil Horman wrote:
>  			skb_dst_drop(nskb);
> > >  
> > > +		skb_len = nskb->len;
> > >  		rc = ops->ndo_start_xmit(nskb, dev);
> > > -		trace_net_dev_xmit(nskb, rc);
> > > +		trace_net_dev_xmit(nskb, rc, dev, skb_len);
> > 
> > What if you just put the tracepoint before the call to
> > ops->ndo_start_xmit?
> > 
> Then you won't know the return code of ndo_start_xmit, which this tracepoint
> records.

Doh! Yeah, I see that now ;)

-- Steve


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