We already do slab reclaim during page reclaim. Add a call to object expiration in slub whenever shrink_slab() is called. If the reclaim is zone specific then use the node of the zone to restrict reclaim in slub. Signed-off-by: Christoph Lameter <cl@xxxxxxxxx> --- mm/vmscan.c | 4 ++++ 1 file changed, 4 insertions(+) Index: linux-2.6/mm/vmscan.c =================================================================== --- linux-2.6.orig/mm/vmscan.c 2010-10-04 08:14:25.000000000 -0500 +++ linux-2.6/mm/vmscan.c 2010-10-04 08:26:47.000000000 -0500 @@ -1917,6 +1917,7 @@ static unsigned long do_try_to_free_page sc->nr_reclaimed += reclaim_state->reclaimed_slab; reclaim_state->reclaimed_slab = 0; } + kmem_cache_expire_all(NUMA_NO_NODE); } total_scanned += sc->nr_scanned; if (sc->nr_reclaimed >= sc->nr_to_reclaim) @@ -2221,6 +2222,7 @@ loop_again: reclaim_state->reclaimed_slab = 0; nr_slab = shrink_slab(sc.nr_scanned, GFP_KERNEL, lru_pages); + kmem_cache_expire_all(zone_to_nid(zone)); sc.nr_reclaimed += reclaim_state->reclaimed_slab; total_scanned += sc.nr_scanned; if (zone->all_unreclaimable) @@ -2722,6 +2724,8 @@ static int __zone_reclaim(struct zone *z break; } + kmem_cache_expire_all(zone_to_nid(zone)); + /* * Update nr_reclaimed by the number of slab pages we * reclaimed from this zone. -- 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>