Re: [PATCH rdma-next 0/2] Introduce an IB device's scatter end padding capability

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On Tue, Oct 17, 2017 at 06:18:55PM +0300, Leon Romanovsky wrote:
> There are PCIe root complex that are able to optimize their
> performance when incoming data is multiple full cache lines.
> 
> Expose the device capability to pad the ending of incoming packets
> (scatter) to full cache line such that the last upstream write
> generated by the incoming packet will be a full cache line.

Any why would this be a user controller option?  Isn't this something
that the kernel should set up automatically instead of needing arcane
tribal knowledge in the ULPs and applications?
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