[ofa-general] [PATCH] nfsrdma: fix connection/qp creation for mlx4,
James Lentini
jlentini at netapp.com
Thu Jun 12 12:45:53 PDT 2008
On Thu, 12 Jun 2008, Vu Pham wrote:
> Hi James/Tom,
>
> MLX4 transport (connectX HCA) need 2 extra S/G entries per work
> request. One is for the header and one for the checksum at the end.
> This patch will fix rpc rdma transport to create qp with
> max_send_sge = device_cap.max_sge - 2 if low-level device hca is
> connectX
>
> thanks,
> -vu
>
>
Vu,
Many ULPs use the device's advertized maximum S/G count to size their
S/G entries.
Did you consider changing the driver to advertize 2 less S/G entries?
james
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