On Wed, Jun 30, 2021 at 01:34:17AM +0000, John Stultz wrote:

This adds a shrinker controlled page pool, extracted
out of the ttm_pool logic, and abstracted out a bit
so it can be used by other non-ttm drivers.

Can you explain in detail why you need a differnt page pool over the one
maintained by the page allocator?  Fragmenting the memory into all kinds
of pools has lots of downsides, so the upsides need to be explained in
detail.