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

[Leon Romanovsky]

On Thu, Oct 31, 2024 at 10:21:13AM +0100, Christoph Hellwig wrote:
> On Thu, Oct 31, 2024 at 11:05:30AM +0200, Leon Romanovsky wrote:
> > This series is a subset of the series you tested and doesn't include the
> > block layer changes which most likely were the cause of the performance
> > regression.
> > 
> > This is why I separated the block layer changes from the rest of the series
> > and marked them as RFC.
> > 
> > The current patch set is viable for HMM and VFIO. Can you please retest
> > only this series and leave the block layer changes for later till Christoph
> > finds the answer for the performance regression?
> 
> As the subset doesn't touch block code or code called by block I don't
> think we need Jens to benchmark it, unless he really wants to.

He wrote this sentence in his email, while responding on subset which doesn't change
anything in block layer: "just want to make sure something like this doesn't get merged
until that is both fully understood and sorted out."

This series works like a charm for RDMA (HMM) and VFIO.

Thanks