lkml.org 
[lkml]   [2019]   [Apr]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC PATCH 0/2] mm/memcontrol: Finer-grained memory control
On Wed 10-04-19 15:13:19, 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.

Please be more specific about a usecase.

> 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.

Please be more specific about the semantic.

I am really skeptical about this feature to be honest, though.

> For simplicity, the limit is not hierarchical and applies to only tasks
> in the local memory cgroup.

This is a no-go to begin with.

> 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

--
Michal Hocko
SUSE Labs

\
 
 \ /
  Last update: 2019-04-10 21:55    [W:0.106 / U:4.992 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site