Re: [PATCH v2 2/2] IB/umem: use get_user_pages_fast() to pin DMA pages

[Leon Romanovsky]

On Wed, Dec 04, 2019 at 01:36:03PM -0800, John Hubbard wrote:
> And get rid of the mmap_sem calls, as part of that. Note
> that get_user_pages_fast() will, if necessary, fall back to
> __gup_longterm_unlocked(), which takes the mmap_sem as needed.
>
> Reviewed-by: Christoph Hellwig <hch@xxxxxx>
> Reviewed-by: Jan Kara <jack@xxxxxxx>
> Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
> Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx>
> Signed-off-by: John Hubbard <jhubbard@xxxxxxxxxx>
> ---
>  drivers/infiniband/core/umem.c | 17 ++++++-----------
>  1 file changed, 6 insertions(+), 11 deletions(-)
>

Thanks,
Reviewed-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>