[RFC v2 2/3] nvme: add error logging opt-in

[alan.adamson at oracle.com]

On 3/30/23 6:38 AM, Sagi Grimberg wrote:
>>> Is this something that we need per ctrl? My assumption is that
>>> if someone wants this, one would enable it for all controllers.
>>> Maybe this should be a modparam instead?
>>
>> Maybe both?  Have the ability to set the system-wide default value 
>> via modparam and sysfs to change it per ctrl?
>
> Definitely not both. If per controller setting is needed then lets do
> that, and if not, lets do a global modparam.

I think the use-case for it would be:

- debugging a problematic controller.  So you would only need logging 
enabled for a short time while  debugging that controller.

- Some application  that is sending passthrough commands to a specific 
controller.

Its probably best to enable it per controller.

Alan