On Wed 18-05-22 22:44:13, Wei Xu wrote: > On Tue, May 17, 2022 at 1:06 PM Johannes Weiner <hannes@xxxxxxxxxxx> wrote: [...] > > But I don't think an anon/file bias will capture this coefficient? > > It essentially provides the userspace proactive reclaimer an ability > to define its own reclaim policy by adding an argument to specify > which type of pages to reclaim via memory.reclaim. I am not sure the swappiness is really a proper interface for that. Historically this tunable has changed behavior several times and the reclaim algorithm is free to ignore it completely in many cases. If you want to build a userspace reclaim policy, then it really has to have a predictable and stable behavior. That would mean that the semantic would have to be much stronger than the global vm_swappiness. -- Michal Hocko SUSE Labs
