Re: Over-eager swapping

[Wu Fengguang]

On Wed, Aug 18, 2010 at 11:57:09PM +0800, Christoph Lameter wrote:
> On Wed, 18 Aug 2010, Wu Fengguang wrote:
> 
> > Andi, Christoph and Lee:
> >
> > This looks like an "unbalanced NUMA memory usage leading to premature
> > swapping" problem.
> 
> Is zone reclaim active? It may not activate on smaller systems leading
> to an unbalance memory usage between node.

Another possibility is, there are many low watermark page allocations,
leading to kswapd page out activities.

Thanks,
Fengguang
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