Re: [PATCH v3 1/1] nvme: multipath: Implemented new iopolicy "queue-depth"

[Nilay Shroff <nilay@linux.ibm.com>]

On 5/21/24 15:45, Sagi Grimberg wrote:
> 
> 
> On 21/05/2024 13:11, Sagi Grimberg wrote:
>>
>>>> Don't think this matters because cancellation only happens when we
>>>> teardown the controller anyways...
>>>>
>>> I think in case if we reset the nvme controller then we don't teardown
>>> controller, isn't it? In this case we cancel all pending requests, and
>>> later restart the controller.
>>
>> Exactly, nvme_mpath_init_ctrl resets the counter.
> 
> Except you're right, the counter reset needs to move to nvme_mpath_init_identify()
> or some place that is called on every controller reset.
Yeah that was my point. Unfortunately, nvme_mpath_init_ctrl() is not called when we do nvme 
controller reset. So either we move nvme_mpath_init_ctrl() to some common place which 
is called from regular controller init code as well as controller reset code path 
or we may explicitly reset nr_active counter from nvme_timeout().

Thanks,
--Nilay