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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>