On Mon 03-08-20 22:26:10, Yafang Shao wrote: > On Mon, Aug 3, 2020 at 10:18 PM Yafang Shao <laoar.shao@xxxxxxxxx> wrote: [...] > > You can use memcg limits (e.g. memory high) to pro-actively reclaim > > excess memory. Have you tried that? > > The memcg limit not only reclaim the slabs, but also reclaim the pagecaches. True but drop_cache doesn't distinguish different kind of objects either. The reclaim will simply try to drop unused cache. All or nothing behavior of drop_caches is exactly what I dislike about the interface. Memory reclaim can at least consider age and reflect the general usage pattern. > Furthermore, there is no per-memcg vm.vfs_cache_pressure neither. Why does that matter? -- Michal Hocko SUSE Labs
