Re: [Patch] memory unplug v3 [0/4]

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

On Tue, 22 May 2007 11:34:04 -0700 (PDT)
Christoph Lameter <clameter@sgi.com> wrote:

> On Tue, 22 May 2007, KAMEZAWA Hiroyuki wrote:
> 
> >  - user kernelcore=XXX boot option to create ZONE_MOVABLE.
> >    Memory unplug itself can work without ZONE_MOVABLE but it will be
> >    better to use kernelcore= if your section size is big.
> 
> Hmmm.... Sure wish the ZONE_MOVABLE would go away. Isnt there some way to 
> have a dynamic boundary within ZONE_NORMAL?
> 
Hmm. 
1. Assume there is only ZONE_NORMAL.
2. grouping pages into MIGRATE_UNMOVABLE, MOGIRATE_RECLAIMABLE, MIGRATE_MOVABLE.
   Some range of pages can be used "only" for MIGRATE_MOVABLE(+ RECLAIMABLE)
3. page recaliming algorithm should know what type of page they should reclaim.

Current page reclaming is zone-based. So I think adding zone is not a bad option
if we use zone-based reclaiming. 

If I think of a simple way to avoid adding new zone, I'll post it. but not yet.

-Kame
 

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