[openib-general] Re: DMA mapping on sparc64

[Michael S. Tsirkin]

Hello!
Quoting r. Roland Dreier (roland at topspin.com) "Re: DMA mapping on sparc64":
>     Michael> Maybe for IP over IB you can have a pool of pre-allocated buffers.
> 
> You can't control the buffers the network stack passes down for you to
> send.  In fact you can't even control where the skbuffs you allocate
> for receives will be.  If you want to use pre-allocated buffers for
> IPoIB then you're stuck copying to and from your own buffers.
> 
> What's wrong with using an L_Key with translation off?  It solves all
> these problems very simply and it works with all known hardware.
> 
>  - R.

Sorry - that was before I read that proposal.