nvmeof rdma regression issue on 4.14.0-rc1 (or maybe mlx4?)

[Yi Zhang]

On 10/16/2017 06:21 PM, Sagi Grimberg wrote:
>>> Lets take this one step at a time, starting with this issue.
>>>
>>> First, there is a reason why a simple create_ctrl fails, can we isolate
>>> exactly which call fails? Was something else going on that might have
>>> made the simple create_ctrl fail?
>>>
>>> We don't see any "rdma_resolve_addr failed" or "failed to connect 
>>> queue"
>>> messages but we do see "creating I/O queues" which means that we either
>>> failed at IO tagset allocation or initializing connect_q.
>>>
>>> We have a missing error code assignment so can you try the following 
>>> patch:
>>
>> Hi Sagi
>> Sorry for the late response, here is the log with your patch, let me 
>> know if you need more test.
>
> Hi Yi,
>
> I was referring to the bug you reported on a simple create_ctrl failed:
> https://pastebin.com/7z0XSGSd
>
> Does it reproduce?
>
yes, this issue was reproduced during "git bisect" with below patch

commit 31fdf18401703df246e20fc0382ed3594e6cf8d8
Author: Sagi Grimberg <sagi at grimberg.me>
Date:   Mon Aug 28 21:40:06 2017 +0200

     nvme-rdma: reuse configure/destroy_admin_queue

     No need to open-code it.

     Signed-off-by: Sagi Grimberg <sagi at grimberg.me>
     Signed-off-by: Christoph Hellwig <hch at lst.de>

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