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Date: Tue, 26 Sep 2023 14:41:04 +0300
From: Leon Romanovsky <leon@kernel.org>
To: Alexandra Winter <wintera@linux.ibm.com>
Cc: Albert Huang <huangjie.albert@bytedance.com>,
	Karsten Graul <kgraul@linux.ibm.com>,
	Wenjia Zhang <wenjia@linux.ibm.com>,
	Jan Karcher <jaka@linux.ibm.com>,
	"D. Wythe" <alibuda@linux.alibaba.com>,
	Tony Lu <tonylu@linux.alibaba.com>,
	Wen Gu <guwen@linux.alibaba.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	linux-s390@vger.kernel.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	RDMA mailing list <linux-rdma@vger.kernel.org>,
	Jason Gunthorpe <jgg@nvidia.com>
Subject: Re: [PATCH net-next] net/smc: add support for netdevice in
 containers.
Message-ID: <20230926114104.GL1642130@unreal>
References: <20230925023546.9964-1-huangjie.albert@bytedance.com>
 <20230926104831.GJ1642130@unreal>
 <76a74084-a900-d559-1f63-deff84e5848a@linux.ibm.com>
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In-Reply-To: <76a74084-a900-d559-1f63-deff84e5848a@linux.ibm.com>

On Tue, Sep 26, 2023 at 01:14:04PM +0200, Alexandra Winter wrote:
> 
> 
> On 26.09.23 12:48, Leon Romanovsky wrote:
> > This patch made me wonder, why doesn't SMC use RDMA-CM like all other
> > in-kernel ULPs which work over RDMA?
> > 
> > Thanks
> 
> The idea behind SMC is that it should look an feel to the applications
> like TCP sockets. So for connection management it uses TCP over IP;
> RDMA is just used for the data transfer.

I think that it is not different from other ULPs. For example, RDS works
over sockets and doesn't touch or reimplement GID management logic.

Thanks