On Thu, Mar 02, 2023 at 10:37:44AM +0100, David Hildenbrand wrote: > Especially for such large sparse VMAs, the current way of allocating > pagetables to place markers/zeropages is far from optimal. IMHO that's not a generic workload. As mentioned in the reply there, I would suggest we go with simple then we have space to optimize it in the future if necessary, because the API will be the same. If I want to monitor a super sparse VMA on dirty, one thing I can already try is register with MISSING + WP (!WP_UNPOPULATED). It may be a good intermediate solution to avoid any marker ovearheads. -- Peter Xu
