Re: [PATCH v1] dmaengine: dmatest: Fix dmatest waiting less when interrupted

[Nathan Lynch <nathan.lynch@amd.com>]

Vinicius Costa Gomes <vinicius.gomes@intel.com> writes:
> Nathan Lynch <nathan.lynch@amd.com> writes:
>
>> Vinicius Costa Gomes <vinicius.gomes@intel.com> writes:
>>> Nathan Lynch <nathan.lynch@amd.com> writes:
>>>> dmatest_callback() employs wake_up_all(), which means this change
>>>> introduces no beneficial difference in the wakeup behavior. The dmatest
>>>> thread gets woken on receipt of the completion interrupt either way.
>>>>
>>>> And to reiterate, the change regresses the combination of dmatest and
>>>> the task freezer, which is a use case people have cared about,
>>>> apparently.
>>>>
>>>
>>> If this change in behavior causes a regression for others, glad to send
>>> a revert and find another solution.
>>
>> Thanks - yes it should be reverted or dropped IMO.
>
> Here's what I am thinking, I'll work on this a few days and see if I can
> find an alternative solution and send the revert together with the fix.
> If I can't find another solution in a few days, I'll propose the revert
> anyway.

Just checking on this - I see this regression is in Linus's master
branch now.