Dear Fengguang (et al), > There are 260MB reclaimable slab pages in the normal zone, however we > somehow failed to reclaim them. ... Could the problem be that without CONFIG_NUMA, zone_reclaim_mode stays at zero and anyway zone_reclaim() does nothing in include/linux/swap.h ? Though... there is no CONFIG_NUMA nor /proc/sys/vm/zone_reclaim_mode in the Ubuntu non-PAE "plain" HIGHMEM4G kernel, and still it handles the "sleep test" just fine. Where does reclaiming happen (or meant to happen)? Thanks, Paul Paul Szabo psz@xxxxxxxxxxxxxxxxx http://www.maths.usyd.edu.au/u/psz/ School of Mathematics and Statistics University of Sydney Australia -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>