Re: InfiniBand/RDMA merge plans for 2.6.24

[Shirley Ma]

Roland Dreier <rdreier@xxxxxxxxx> wrote on 09/17/2007 02:47:42 PM:

>  > > IPoIB CM handles this properly by gathering together single pages 
in
>  > > skbs' fragment lists.
> 
>  > Then can we reuse IPoIB CM code here?
> 
> Yes, if possible, refactoring things so that the rx skb allocation
> code becomes common between CM and non-CM would definitely make sense.

IPoIB-CM rx skb allocation is not generic to be used by UD, it allocates 
more buffers than needed if mtu is not 64K, and doesn't query the real 
max_num_sg from the device. I am thinking to have a generic skb allocation 
in IPoIB based on matrix of (ipoib-mtu-size, page-size, max_num_sg, 
head-size).

Thanks
Shirley 
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