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From: Mel Gorman on 7 Apr 2010 11:50
On Tue, Apr 06, 2010 at 05:05:59PM -0700, Andrew Morton wrote:
> On Fri, 2 Apr 2010 17:02:44 +0100
> Mel Gorman <mel(a)csn.ul.ie> wrote:
>
> > This patch adds a per-node sysfs file called compact. When the file is
> > written to, each zone in that node is compacted. The intention that this
> > would be used by something like a job scheduler in a batch system before
> > a job starts so that the job can allocate the maximum number of
> > hugepages without significant start-up cost.
>
> Would it make more sense if this was a per-memcg thing rather than a
> per-node thing?
>

Kamezawa Hiroyuki covered this perfectly. memcg doesn't care and while
cpuset might, there are a lot more people working with nodes than there
are with cpuset.

--
Mel Gorman
Part-time Phd Student Linux Technology Center
University of Limerick IBM Dublin Software Lab
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