From: Jason Gunthorpe <jgg@ziepe.ca>
To: "Liu, Changcheng" <changcheng.liu@intel.com>
Cc: linux-rdma@vger.kernel.org
Subject: Re: why ibv_wc src_qp is zero
Date: Wed, 21 Aug 2019 09:25:54 -0300 [thread overview]
Message-ID: <20190821122554.GA8653@ziepe.ca> (raw)
In-Reply-To: <20190821121436.GA1834@jerryopenix>
On Wed, Aug 21, 2019 at 08:14:36PM +0800, Liu, Changcheng wrote:
> Hi all,
> Does anyone know the usage of the src_qp field in struct ibv_wc?
>
> I’m using RC transport type with only Send Operation on Send Queue.
> On the requester side, when SQ WR is finished, there’s one WCE is on CQ. ibv_wc::src_qp is checked with zero value.
> On the responder side, when RQ WR is finished, there’s one WCE is on CQ. ibv_wc::src_qp is checked with zero value too.
> Why the ibv_wc::src_qp field is zero instead of recording the peer's qp number?
It is only supported for UD QPs
Jason
next prev parent reply other threads:[~2019-08-21 12:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-21 12:14 why ibv_wc src_qp is zero Liu, Changcheng
2019-08-21 12:25 ` Jason Gunthorpe [this message]
2019-08-21 12:30 ` Liu, Changcheng
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