linux-kernel - Re: [PATCH 4/4] add ksm kernel shared memory driver.

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Message-Id: <20090401085710.d2f0b267.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Wed, 1 Apr 2009 08:57:10 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Izik Eidus <ieidus@...hat.com>
Cc:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	linux-mm@...ck.org, avi@...hat.com, aarcange@...hat.com,
	chrisw@...hat.com, riel@...hat.com, jeremy@...p.org,
	mtosatti@...hat.com, hugh@...itas.com, corbet@....net,
	yaniv@...hat.com, dmonakhov@...nvz.org
Subject: Re: [PATCH 4/4] add ksm kernel shared memory driver.

On Tue, 31 Mar 2009 15:21:53 +0300
Izik Eidus <ieidus@...hat.com> wrote:
> >   
> kpage is actually what going to be KsmPage -> the shared page...
> 
> Right now this pages are not swappable..., after ksm will be merged we 
> will make this pages swappable as well...
> 
sure.

> > If so, please
> >  - show the amount of kpage
> >  
> >  - allow users to set limit for usage of kpages. or preserve kpages at boot or
> >    by user's command.
> >   
> 
> kpage actually save memory..., and limiting the number of them, would 
> make you limit the number of shared pages...
> 

Ah, I'm working for memory control cgroup. And *KSM* will be out of control.
It's ok to make the default limit value as INFINITY. but please add knobs.

Thanks,
-Kame

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