Re: [RFC] respect the referenced bit of KVM guest pages?

[Wu Fengguang <fengguang.wu@intel.com>]

On Sun, Aug 16, 2009 at 11:56:39AM +0800, Rik van Riel wrote:
> Wu Fengguang wrote:
> 
> > Right, but I meant busty page allocations and accesses on them, which
> > can make a large continuous segment of referenced pages in LRU list,
> > say 50MB.  They may or may not be valuable as a whole, however a local
> > algorithm may keep the first 4MB and drop the remaining 46MB.
> 
> I wonder if the problem is that we simply do not keep a large
> enough inactive list in Jeff's test.  If we do not, pages do
> not have a chance to be referenced again before the reclaim
> code comes in.

Exactly, that's the case I call the list FIFO.

> The cgroup stats should show how many active anon and inactive
> anon pages there are in the cgroup.

Jeff, can you have a look at these stats? Thanks!