[PATCH 2/2] nvme-multipath: don't block on blk_queue_enter of the underlying device

[Christoph Hellwig]

On Tue, Mar 23, 2021 at 12:00:34PM -0700, Sagi Grimberg wrote:
>
>>> The deadlock in this patchset reproduces upstream. It is not possible to
>>> update the kernel in the env in the original report.
>>>
>>> So IFF we assume that this does not reproduce in upstream (pending
>>> proof), is there something that we can do with stable fixes? This will
>>> probably go back to everything that is before 5.8...
>>
>> The direct_make_request removal should be pretty easily backportable.
>
> Umm, the direct_make_request removal is based on the submit_bio_noacct
> rework you've done. Are you suggesting that we replace it with
> generic_make_request for these kernels?

Yes.