[PATCH] nvme-rdma: fix crash for no IO queues

[Hannes Reinecke]

On 3/3/21 4:39 AM, Chao Leng wrote:
> 
> 
> On 2021/3/3 11:14, Keith Busch wrote:
>> On Wed, Mar 03, 2021 at 10:27:01AM +0800, Chao Leng wrote:
>>> On 2021/3/3 2:24, Keith Busch wrote:
>>>> We can continue to administrate a controller that didn't create IO
>>>> queues, but the controller must provide a response to all commands. If
>>>> it doesn't, the controller will either be reset or abandoned. This
>>>> should be the same behavior for any transport, though; there's nothing
>>>> special about PCIe for that.
>>> Though I don't see any useful scenarios for nvme over fabric now,
>>> Reserved for future possibilities may be a better choice.
>>
>> The admin queue may be the only way for a user to retrieve useful
>> information on the malfunctioning controller. The telemetry log isn't
>> unique to PCIe.
> User can also directly visit target to get these information for
> nvme over fabrics.

Not necessarily. There is no requirement that the storage admin is
identical to the host admin; in fact, in larger installations both roles
are strictly separated.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		           Kernel Storage Architect
hare at suse.de			                  +49 911 74053 688
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