[PATCH/RFCv4 0/6] The Contiguous Memory Allocator framework

[KAMEZAWA Hiroyuki]

On Thu, 26 Aug 2010 13:06:28 +0900
Minchan Kim <minchan.kim at gmail.com> wrote:

> On Thu, Aug 26, 2010 at 12:44 PM, KAMEZAWA Hiroyuki
> <kamezawa.hiroyu at jp.fujitsu.com> wrote:
> > On Thu, 26 Aug 2010 11:50:17 +0900
> > KAMEZAWA Hiroyuki <kamezawa.hiroyu at jp.fujitsu.com> wrote:
> >
> >> 128MB...too big ? But it's depend on config.
> >>
> >> IBM's ppc guys used 16MB section, and recently, a new interface to shrink
> >> the number of /sys files are added, maybe usable.
> >>
> >> Something good with this approach will be you can create "cma" memory
> >> before installing driver.
> >>
> >> But yes, complicated and need some works.
> >>
> > Ah, I need to clarify what I want to say.
> >
> > With compaction, it's helpful, but you can't get contiguous memory larger
> > than MAX_ORDER, I think. To get memory larger than MAX_ORDER on demand,
> > memory hot-plug code has almost all necessary things.
> 
> True. Doesn't patch's idea of Christoph helps this ?
> http://lwn.net/Articles/200699/
> 

yes, I think so. But, IIRC,  it's own purpose of Chirstoph's work is
for removing zones. please be careful what's really necessary.

Thanks,
-Kame