[PATCH 1/2] nvme: make NVMe freeze API reliably

[Christoph Hellwig]

On Thu, Aug 25, 2022 at 06:02:33PM +0800, Chao Leng wrote:
>
>
> On 2022/8/21 16:47, Ming Lei wrote:
>> From: Keith Busch <kbusch at kernel.org>
>>
>> In some corner cases[1], freeze wait and unfreeze API may be called on
>> unfrozen queue, add one per-ns flag of NVME_NS_FREEZE to make these
>> freeze APIs more reliably, then this kind of issues can be avoided.
>> And similar approach has been applied on stopping/quiescing nvme queues.
> This leads to another problem: the process that needs to be
> in the frozen state is not actually frozen.

Where do frozen processes come into play here?