The current control mechanism for memory cgroup v2 lumps all the memory together irrespective of the type of memory objects. However, there are cases where users may have more concern about one type of memory usage than the others. We have customer request to limit memory consumption on anonymous memory only as they said the feature was available in other OSes like Solaris. To allow finer-grained control of memory, this patchset 2 new control knobs for memory controller: - memory.subset.list for specifying the type of memory to be under control. - memory.subset.high for the high limit of memory consumption of that memory type. For simplicity, the limit is not hierarchical and applies to only tasks in the local memory cgroup. Waiman Long (2): mm/memcontrol: Finer-grained control for subset of allocated memory mm/memcontrol: Add a new MEMCG_SUBSET_HIGH event Documentation/admin-guide/cgroup-v2.rst | 35 +++++++++ include/linux/memcontrol.h | 8 ++ mm/memcontrol.c | 100 +++++++++++++++++++++++- 3 files changed, 142 insertions(+), 1 deletion(-) -- 2.18.1
