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SubjectRe: [PATCH V14 00/24] mmc: Add Command Queue support
[...]

>>> While we should look at changing blk-mq to give better workqueue performance,
>>> a bigger gain is likely to be made by adding a new host API to enable the
>>> next already-prepared request to be issued directly from within ->done()
>>> callback of the current request.
>
> I assume that is taken care of by adding the new host cap
> (MMC_CAP_DIRECT_COMPLETE).
>
> So, then it's just a matter of adopting all host drivers, and when we
> are done with that, we can remove that cap. :-)

Ehh, I realize that this not what you really propose, but rather this
is a next step of improvement. Anyway.

[...]

Kind regards
Uffe

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