From mboxrd@z Thu Jan  1 00:00:00 1970
From: sagi@grimberg.me (Sagi Grimberg)
Date: Thu, 19 Oct 2017 12:44:13 +0300
Subject: nvmeof rdma regression issue on 4.14.0-rc1 (or maybe mlx4?)
In-Reply-To: <0561ed58-7104-d8b6-1709-ea181ac493f5@redhat.com>
References: <1735134433.8514119.1505997532669.JavaMail.zimbra@redhat.com>
 <1215229914.8516804.1505998051674.JavaMail.zimbra@redhat.com>
 <20170921144421.GA15285@infradead.org>
 <47493aa0-4cad-721b-4ea2-c3b2293340aa@grimberg.me>
 <e8aa9f2e-14b1-23f0-f672-07a913842c9d@redhat.com>
 <20170924103426.GB25094@mtr-leonro.local>
 <4d0e27f2-99e4-ffc7-18a5-e5757c27dad4@redhat.com>
 <4faccebf-7fcf-58b9-1605-82ee9acc652b@grimberg.me>
 <e44f4640-44b2-4692-ca57-08f9ebf4da2c@redhat.com>
 <729c512f-55ff-25e4-6dd9-8b4dcc31bb8d@grimberg.me>
 <ff355fcf-5089-f297-d3fa-9b86d133236b@redhat.com>
 <6d639dd4-9366-2ecf-b49e-751c7a167528@grimberg.me>
 <64135330-a62d-87b8-c805-6b52fd40bf81@redhat.com>
 <62eea88b-caa4-5799-3d8f-8d8789879aa8@grimberg.me>
 <0561ed58-7104-d8b6-1709-ea181ac493f5@redhat.com>
Message-ID: <0069d38b-efb7-0d41-ff0f-2087572cb22f@grimberg.me>


> Hi Sagi
> With this patch, no such error log found on host side,


Awsome. that's the culprit...

> but I found there 
> is no nvme0n1 device node even get "nvme nvme0: Successfully 
> reconnected" on host.

That is expected because you did not persist a namespace UUID
which caused the kernel to generate a random one. That confused
the host as it got the same namespace ID with a different UUID.

Can you please set a uuid when you rerun the test?