---
 fs/dcache.c              |    1 +
 include/linux/slub_def.h |    2 ++
 mm/slub.c                |   36 +++++++++++++++++++++++++++++++++---
 3 files changed, 36 insertions(+), 3 deletions(-)

Index: slub/fs/dcache.c
===================================================================
--- slub.orig/fs/dcache.c	2007-05-21 18:18:22.000000000 -0700
+++ slub/fs/dcache.c	2007-05-21 18:18:45.000000000 -0700
@@ -524,6 +524,7 @@ static void prune_dcache(int count, stru
 		dentry_stat.nr_unused++;
 	}
 	spin_unlock(&dcache_lock);
+	kmem_cache_shrink(dentry_cache);
 }
 
 /*
Index: slub/include/linux/slub_def.h
===================================================================
--- slub.orig/include/linux/slub_def.h	2007-05-21 18:19:26.000000000 -0700
+++ slub/include/linux/slub_def.h	2007-05-21 18:26:05.000000000 -0700
@@ -43,6 +43,8 @@ struct kmem_cache {
 	void (*ctor)(void *, struct kmem_cache *, unsigned long);
 	int inuse;		/* Offset to metadata */
 	int align;		/* Alignment */
+	unsigned long shrink_next;	/* Next kmem_cache_shrink */
+	unsigned long shrink_partial;
 	const char *name;	/* Name (only for display!) */
 	struct list_head list;	/* List of slab caches */
 	struct kobject kobj;	/* For sysfs */
Index: slub/mm/slub.c
===================================================================
--- slub.orig/mm/slub.c	2007-05-21 18:18:48.000000000 -0700
+++ slub/mm/slub.c	2007-05-21 18:40:59.000000000 -0700
@@ -2334,14 +2334,39 @@ int kmem_cache_shrink(struct kmem_cache 
 	struct kmem_cache_node *n;
 	struct page *page;
 	struct page *t;
-	struct list_head *slabs_by_inuse =
-		kmalloc(sizeof(struct list_head) * s->objects, GFP_KERNEL);
+	struct list_head *slabs_by_inuse;
 	unsigned long flags;
+	unsigned long x;
+	unsigned long seconds = 10;
+
+	if (time_before(jiffies, s->shrink_next))
+		return 0;
+
+	x = 0;
+	for_each_online_node(node)
+			x += get_node(s, node)->nr_partial;
+
+	if (x <= MAX_PARTIAL) {
+		seconds = 60;
+		goto next_shrink;
+	}
+
+	if (x < s->shrink_partial) {
+		/* Reduce by 10% for next check */
+		s->shrink_partial = (s->shrink_partial * 98) / 100;
+		goto next_shrink;
+	}
+
+	s->shrink_partial = x;
+
+	slabs_by_inuse =
+		kmalloc(sizeof(struct list_head) * s->objects, GFP_KERNEL);
 
 	if (!slabs_by_inuse)
 		return -ENOMEM;
 
 	flush_all(s);
+	x = 0;
 	for_each_online_node(node) {
 		n = get_node(s, node);
 
@@ -2389,10 +2414,15 @@ int kmem_cache_shrink(struct kmem_cache 
 
 	out:
 		spin_unlock_irqrestore(&n->list_lock, flags);
+		x += n->nr_partial;
 	}
 
 	kfree(slabs_by_inuse);
-	return 0;
+	s->shrink_partial = x;
+	printk(KERN_INFO "SLUB shrink %s. %ld partial slabs.\n", s->name, x);
+next_shrink:
+	s->shrink_next = jiffies + seconds * HZ;
+	return x == 0;
 }
 EXPORT_SYMBOL(kmem_cache_shrink);