Re: [PATCH v4 0/4] mm/gup: page unpining improvements

[Christoph Hellwig]

On Fri, Feb 12, 2021 at 01:08:39PM +0000, Joao Martins wrote:
> Hey,
> 
> This series improves page unpinning, with an eye on improving MR
> deregistration for big swaths of memory (which is bound by the page
> unpining), particularly:

Can you also take a look at the (bdev and iomap) direct I/O code to
make use of this?  It should really help there, with a much wieder use
than RDMA.