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Re: [Xen-devel] netchannel vs MAX_SKB_FRAGS (Was: Re: [PATCH] xen/netfront: handle compound page fragments on transmit)



On Fri, 2012-11-23 at 09:26 +0000, James Harper wrote:
> > 
> > Given that it's a backend limitation and not a protocol limitation then it's
> > probably not for documentation to define. Instead it may be more useful if
> > the protocol itself allowed the backend to notify the frontend of its
> > fragmentation constraints (and probably vice versa).
> > 
> 
> That would be good. It would have been nice if the feature-sg defined
> the maximum number of fragments but I guess that can't be changed now
> without breaking backwards compatibility.

We could add such a node, with the default in its absence being whatever
to status quo is right now (16..18 slots per frame, whatever it actually
is).

Ian.


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