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 2010-07-30 18:37:47.638837043 -0500 +++ linux-2.6/mm/vmscan.c 2010-07-30 18:57:44.867515416 -0500 @@ -1826,6 +1826,7 @@ 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) @@ -2133,6 +2134,7 @@ reclaim_state->reclaimed_slab = 0; nr_slab = shrink_slab(sc.nr_scanned, GFP_KERNEL, lru_pages); + kmem_cache_expire_all(nid); sc.nr_reclaimed += reclaim_state->reclaimed_slab; total_scanned += sc.nr_scanned; if (zone->all_unreclaimable) @@ -2640,6 +2642,8 @@ */ sc.nr_reclaimed += slab_reclaimable - zone_page_state(zone, NR_SLAB_RECLAIMABLE); + + kmem_cache_expire_all(zone_to_nid(zone)); } p->reclaim_state = NULL; -- 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>