On 2/12/19 8:39 AM, Christopher Lameter wrote: > On Mon, 11 Feb 2019, John Hubbard wrote: > >> But anyway, Jan's proposal a bit earlier today [1] is finally sinking into >> my head--if we actually go that way, and prevent the caller from setting up >> a problematic gup pin in the first place, then that may make this point sort >> of moot. > > Ok well can be document how we think it would work somewhere? Long term > mapping a page cache page could a problem and we need to explain that > somewhere. > Yes, once the dust settles, I think Documentation/vm/get_user_pages.rst is the right place. I started to create that file, but someone observed that my initial content was entirely backward-looking (described the original problem, instead of describing how the new system would work). So I'll use this opportunity for a do-over. :) thanks, -- John Hubbard NVIDIA
