Re: [RFC PATCH] RDMA/rxe: Export imm_data to WC when the related WR with imm_data finished on SQ

Xiao Yang
2021-01-28T02:26:20Z

On 2021/1/27 20:04, Leon Romanovsky wrote:
> On Wed, Jan 27, 2021 at 04:24:31PM +0800, Xiao Yang wrote:
>> Even if we enable sq_sig_all or IBV_SEND_SIGNALED, current rxe
>> module cannot set imm_data in WC when the related WR with imm_data
>> finished on SQ.
>>
>> Signed-off-by: Xiao Yang<yangx.jy@cn.fujitsu.com>
>> ---
>>
>> Current rxe module and other rdma modules(e.g. mlx5) only set
>> imm_data in WC when the related WR with imm_data finished on RQ.
>> I am not sure if it is a expected behavior.
> This is IBTA behavior.
>
> 5.2.11 IMMEDIATE DATA EXTENDED TRANSPORT HEADER (ImmDt) - 4 BYTES
> "Immediate Data (ImmDt) contains data that is placed in the receive
> Completion Queue Element (CQE). The ImmDt is only allowed in SEND or
> RDMA WRITE packets with Immediate Data."
>
> If I understand the spec, you shouldn't set imm_data in SQ.
Hi Leon,

Got it, thanks a lot for your explanation.

Best Regards,
Xiao Yang
> Thanks
>
>
> .
>