From: Zhu Yanjun <yanjun.zhu@linux.dev>
To: Konstantin Taranov <kotaranov@microsoft.com>,
Jun Han Ng <junhan@balaenaquant.com>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>
Subject: Re: ENODEV in rdma_create_ep with loopback as address
Date: Thu, 16 May 2024 17:55:19 +0200 [thread overview]
Message-ID: <cc984fea-8533-48b1-bf8e-1c9baff2ff43@linux.dev> (raw)
In-Reply-To: <GV1PR83MB0700C80470457BD70210F8C6B4ED2@GV1PR83MB0700.EURPRD83.prod.outlook.com>
在 2024/5/16 16:48, Konstantin Taranov 写道:
>> When attempting to call rdma_create_ep in active mode with the loopback
>> address obtained by rdma_getaddrinfo, -1 is returned with ENODEV errno().
>
> What do you call a "loopback address"?
>
> Note, you cannot use 127.0.0.1 as there is no RDMA device behind this IP.
> You can run "ibv_devinfo -v" and use any IP listed in the GID table for a loopback experiment.
Exactly, 127.0.0.1 and 0.0.0.0 are used as private ip addresses in rdma
cma. As such, it had better not to use the 2 ip addresses.
Zhu Yanjun
>
> - Konstantin
prev parent reply other threads:[~2024-05-16 15:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-16 13:58 ENODEV in rdma_create_ep with loopback as address Jun Han Ng
2024-05-16 14:48 ` Konstantin Taranov
2024-05-16 15:05 ` Jun Han Ng
2024-05-16 15:55 ` Zhu Yanjun [this message]
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