[PATCH] nvmet: move percpu handling into nvmet_ns_{enable,disable}

[Sagi Grimberg]

On 24/01/2025 10:25, hare at kernel.org wrote:
> From: Hannes Reinecke <hare at kernel.org>
>
> The namespace percpu counter protects pending I/O, and we can
> only safely diable the namespace once the counter drop to zero.
> So we need to init the percpu counter in nvmet_ns_enable(), and
> wait for it to drop to zero in nvmet_ns_disable() to avoid having
> I/O pending after the namespace has been disabled.
>
> Fixes: 74d16965d7ac ("nvmet-loop: avoid using mutex in IO hotpath")

Can you please describe the bug and scenario which you are hitting this bug?
It is also unclear how the above patch is causing this.

 From quick look patch itself looks reasonable.