Re: [PATCH v1 00/17] Provide a new two step DMA mapping API

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On Wed, Oct 30, 2024 at 07:44:13PM -0600, Jens Axboe wrote:
> On Christoph's request, I tested this series last week and saw some
> pretty significant performance regressions on my box. I don't know what
> the status is in terms of that, just want to make sure something like
> this doesn't get merged until that is both fully understood and sorted
> out.

Working on it, but I have way too many things going on at once.  Note
that the weird thing about your setup was that we apparently dropped into
the slow path, which still puzzles me.  But I should probably also look
into making that path a little less slow.





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