On 11/13/19 10:59 AM, Ira Weiny wrote:
On Tue, Nov 12, 2019 at 08:26:56PM -0800, John Hubbard wrote:Introduce pin_user_pages*() variations of get_user_pages*() calls, and also pin_longterm_pages*() variations. These variants all set FOLL_PIN, which is also introduced, and thoroughly documented. The pin_longterm*() variants also set FOLL_LONGTERM, in addition to FOLL_PIN: pin_user_pages() pin_user_pages_remote() pin_user_pages_fast() pin_longterm_pages() pin_longterm_pages_remote() pin_longterm_pages_fast()At some point in this conversation I thought we were going to put in "unpin_*" versions of these. Is that still in the plans?
Why yes it is! :) Daniel Vetter and Jan Kara both already weighed in [1], in favor of "unpin_user_page*()", rather than "put_user_page*()". I'll change those names. [1] https://lore.kernel.org/r/20191113101210.GD6367@xxxxxxxxxxxxxx thanks, -- John Hubbard NVIDIA
