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Subject[UnifiedV4 13/16] vmscan: Tie slub object expiration into page reclaim
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@linux.com>


---
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.


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