[PATCHv2] nvme-mpath: delete disk after last connection

[Hannes Reinecke]

On 4/20/21 4:16 PM, Keith Busch wrote:
> On Fri, Apr 16, 2021 at 08:24:11AM +0200, Hannes Reinecke wrote:
>> Now delete all paths to one of the namespaces:
>>
>>   # echo 1 > /sys/class/nvme/nvme3/delete_controller
>>   # echo 1 > /sys/class/nvme/nvme4/delete_controller
>>
>> We have no path, but mdstat says:
>>
>>   # cat /proc/mdstat
>>   Personalities : [raid1]
>>   md0 : active (auto-read-only) raid1 nvme5n1[1]
>>         64512 blocks super 1.2 [2/1] [_U]
>>
>> And this is reported to cause a problem.
>>
>> With the proposed patch, the following messages appear:
>>
>>   [  227.516807] md/raid1:md0: Disk failure on nvme3n1, disabling device.
>>   [  227.516807] md/raid1:md0: Operation continuing on 1 devices.
>>
>> And mdstat shows only the viable members:
>>
>>   # cat /proc/mdstat
>>   Personalities : [raid1]
>>   md0 : active (auto-read-only) raid1 nvme5n1[1]
>>         64512 blocks super 1.2 [2/1] [_U]
> 
> I think there's a copy-paste error in this change log (probably my
> mistake). The first mdstat should have shown nvme3n1 was still there,
> right?
> 
Possibly. Will be resending.

Cheers,

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