[RFC][PATCH] memory controller per zone patches take 2 [9/10] per-zone-lru for memory cgroup

[KAMEZAWA Hiroyuki]

On Mon, 19 Nov 2007 11:51:15 +0530
Balbir Singh <balbir at linux.vnet.ibm.com> wrote:
> > =
> > /cgroup/group_A/group_A_1
> >             .  /group_A_2
> >                /group_A_3
> > (LRU(s) will be used for maintaining parent/child groups.)
> > 
> 
> The LRU's will be shared, my vision is
> 
> 		LRU
> 		^ ^
> 		| |
> 	Mem-----+ +----Mem
> 
> 
> That two or more mem_cgroup's can refer to the same LRU list and have
> their own resource counters. This setup will be used in the case
> of a hierarchy, so that a child can share memory with its parent
> and have it's own limit.
> 
> The mem_cgroup will basically then only contain a reference
> to the LRU list.
> 
Hmm, interesting. 

Then, 
   group_A_1's usage + group_A_2's usage + group_A_3's usgae < group_A's limit.
   group_A_1, group_A_2, group_A_3 has its own limit.
In plan.

I wonder if we want rich control functions, we need "share" or "priority" among
childs. (but maybe this will be complicated one.)

Thank you for explanation.

Regards,
-Kame