[PATCH v3 04/16] misc/habana: Use FOLL_LONGTERM for userptr

[Daniel Vetter]

Hi Oded,

Did testing on your end turn up anything, or can I put an
ack&tested-by from you on the two habana patches for the next round?

Thanks, Daniel

On Wed, Oct 21, 2020 at 10:57 AM Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
>
> These are persistent, not just for the duration of a dma operation.
>
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> Cc: Jason Gunthorpe <jgg at ziepe.ca>
> Cc: Andrew Morton <akpm at linux-foundation.org>
> Cc: John Hubbard <jhubbard at nvidia.com>
> Cc: Jérôme Glisse <jglisse at redhat.com>
> Cc: Jan Kara <jack at suse.cz>
> Cc: Dan Williams <dan.j.williams at intel.com>
> Cc: linux-mm at kvack.org
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: linux-samsung-soc at vger.kernel.org
> Cc: linux-media at vger.kernel.org
> Cc: Oded Gabbay <oded.gabbay at gmail.com>
> Cc: Omer Shpigelman <oshpigelman at habana.ai>
> Cc: Ofir Bitton <obitton at habana.ai>
> Cc: Tomer Tayar <ttayar at habana.ai>
> Cc: Moti Haimovski <mhaimovski at habana.ai>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Cc: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
> Cc: Pawel Piskorski <ppiskorski at habana.ai>
> Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.com>
> ---
>  drivers/misc/habanalabs/common/memory.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/misc/habanalabs/common/memory.c b/drivers/misc/habanalabs/common/memory.c
> index 327b64479f97..767d3644c033 100644
> --- a/drivers/misc/habanalabs/common/memory.c
> +++ b/drivers/misc/habanalabs/common/memory.c
> @@ -1288,7 +1288,8 @@ static int get_user_memory(struct hl_device *hdev, u64 addr, u64 size,
>                 return -ENOMEM;
>         }
>
> -       rc = pin_user_pages_fast(start, npages, FOLL_FORCE | FOLL_WRITE,
> +       rc = pin_user_pages_fast(start, npages,
> +                                FOLL_FORCE | FOLL_WRITE | FOLL_LONGTERM,
>                                  userptr->pages);
>
>         if (rc != npages) {
> --
> 2.28.0
>


-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch