Hi Andrea, 1. This mechanism is quite general. It is possible that, although hibernation may be an important use, there will be other uses for it. I suggest leaving the hibernation example and performance analysis, but not mentioning PM or hibernation in the patch subject. 2. It may be useful to have run_show() return the number of pages reclaimed in the last attempt. (I had suggested something similar in https://lore.kernel.org/linux-mm/CAA25o9SxajRaa+ZyhvTYdaKdXokcrNYXgEUimax4sUJGCmRYLA@xxxxxxxxxxxxxx/). 3. It is not clear how much mm_reclaim/release is going to help. If the preloading of the swapped-out pages uses some kind of LIFO order, and can batch multiple pages, then it might help. Otherwise demand paging is likely to be more effective. If the preloading does indeed help, it may be useful to explain why in the commit message. Thanks!
