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SubjectRe: [RFC PATCH 0/2] mm/memcontrol: Finer-grained memory control
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On 10.04.2019 22:13, Waiman Long wrote:
> 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(-)

CC Andrey.

In Virtuozzo kernel we have similar functionality for limitation of page cache in a cgroup:

https://github.com/OpenVZ/vzkernel/commit/8ceef5e0c07c7621fcb0e04ccc48a679dfeec4a4

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