Re: [RFC][PATCH] memcg soft limit (yet another new design) v1

[KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>]

On Tue, 31 Mar 2009 12:19:02 +0530
Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
> > 
> > >  At some point, memcg soft limit reclaim
> > > hits A and reclaims memory from it, allowing B to run without any
> > > problems. I am talking about the state at the end of the experiment.
> > > 
> > Considering LRU rotation (ACTIVE->INACTIVE), pages in group B never goes back
> > to ACTIVE list and can be the first candidates for swap-out via kswapd.
> > 
> > Hmm....kswapd doesn't work at all ?
> > 
> > (or 1700MB was too much.)
> >
> 
> No 1700MB is not too much, since we reclaim from A towards the end
> when ld runs. I need to investigate more and look at the watermarks,
> may be soft limit reclaim reclaims enough and/or the watermarks are
> not very high. I use fake NUMA nodes as well.
>  
When talking about XXMB of swap, +100MB is much ;)

-Kame

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