On 2020-05-23 13:57, Moritz Fischer wrote:
On Fri, May 22, 2020 at 06:52:34PM -0700, John Hubbard wrote:
On 2020-05-19 13:14, John Hubbard wrote:
This code was using get_user_pages_fast(), in a "Case 2" scenario
(DMA/RDMA), using the categorization from [1]. That means that it's
time to convert the get_user_pages_fast() + put_page() calls to
pin_user_pages_fast() + unpin_user_pages() calls.
There is some helpful background in [2]: basically, this is a small
part of fixing a long-standing disconnect between pinning pages, and
file systems' use of those pages.
[1] Documentation/core-api/pin_user_pages.rst
[2] "Explicit pinning of user-space pages":
https://lwn.net/Articles/807108/
Cc: Xu Yilun <yilun...@intel.com>
Cc: Wu Hao <hao...@intel.com>
Cc: Moritz Fischer <m...@kernel.org>
Cc: linux-f...@vger.kernel.org
Signed-off-by: John Hubbard <jhubb...@nvidia.com>
Hi Moritz and FPGA developers,
Is this OK? And if so, is it going into your git tree? Or should I
send it up through a different tree? (I'm new to the FPGA development
model).
I can take it, sorry for sluggish response.
That's great news, thanks Moritz! Sorry to be pushy, just didn't want it
to get lost. :)
thanks,
--
John Hubbard
NVIDIA
