Re: [PATCH v10 23/25] mm/gup: track FOLL_PIN pages

2019-12-12 Thread Jan Kara
On Thu 12-12-19 00:19:15, John Hubbard wrote: > Add tracking of pages that were pinned via FOLL_PIN. > > As mentioned in the FOLL_PIN documentation, callers who effectively set > FOLL_PIN are required to ultimately free such pages via unpin_user_page(). > The effect is similar to FOLL_GET, and

[PATCH v10 23/25] mm/gup: track FOLL_PIN pages

2019-12-12 Thread John Hubbard
Add tracking of pages that were pinned via FOLL_PIN. As mentioned in the FOLL_PIN documentation, callers who effectively set FOLL_PIN are required to ultimately free such pages via unpin_user_page(). The effect is similar to FOLL_GET, and may be thought of as "FOLL_GET for DIO and/or RDMA use".