Re: [RFC][PATCH 1/5] Memory controller soft limit documentation (v8)

[Balbir Singh <balbir@linux.vnet.ibm.com>]

* KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> [2009-07-10 14:32:16]:

> On Thu, 09 Jul 2009 22:44:49 +0530
> Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
> 
> > Feature: Add documentation for soft limits
> > 
> > From: Balbir Singh <balbir@linux.vnet.ibm.com>
> > 
> > Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
> > ---
> > 
> >  Documentation/cgroups/memory.txt |   31 ++++++++++++++++++++++++++++++-
> >  1 files changed, 30 insertions(+), 1 deletions(-)
> > 
> > 
> > diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt
> > index ab0a021..b47815c 100644
> > --- a/Documentation/cgroups/memory.txt
> > +++ b/Documentation/cgroups/memory.txt
> > @@ -379,7 +379,36 @@ cgroups created below it.
> >  
> >  NOTE2: This feature can be enabled/disabled per subtree.
> >  
> > -7. TODO
> > +7. Soft limits
> > +
> > +Soft limits allow for greater sharing of memory. The idea behind soft limits
> > +is to allow control groups to use as much of the memory as needed, provided
> > +
> > +a. There is no memory contention
> > +b. They do not exceed their hard limit
> > +
> > +When the system detects memory contention or low memory control groups
> > +are pushed back to their soft limits. If the soft limit of each control
> > +group is very high, they are pushed back as much as possible to make
> > +sure that one control group does not starve the others of memory.
> > +
> 
> It's better to write "this is best-effort service". We add hook only to kswapd.
> And hou successfull this work depends on ZONE.
>

Will do, Thanks for the review. 

-- 
	Balbir

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