Remove drain_array_locked and use that opportunity to limit the
time the l3 lock is taken further.
Signed-off-by: Christoph Lameter <[email protected]>
Index: linux-2.6.16-rc5-mm2/mm/slab.c
===================================================================
--- linux-2.6.16-rc5-mm2.orig/mm/slab.c 2006-03-03 16:31:40.000000000 -0800
+++ linux-2.6.16-rc5-mm2/mm/slab.c 2006-03-03 16:43:43.000000000 -0800
@@ -2125,9 +2125,6 @@ static void check_spinlock_acquired_node
#define check_spinlock_acquired_node(x, y) do { } while(0)
#endif
-static void drain_array_locked(struct kmem_cache *cachep,
- struct array_cache *ac, int force, int node);
-
static void drain_array(struct kmem_cache *cachep, struct kmem_list3 *l3,
struct array_cache *ac,
int force, int node);
@@ -3555,40 +3552,33 @@ static void enable_cpucache(struct kmem_
cachep->name, -err);
}
-static void drain_array_locked(struct kmem_cache *cachep,
- struct array_cache *ac, int force, int node)
+/*
+ * Drain an array if it contains any elements taking the l3 lock only if
+ * necessary.
+ */
+void drain_array(struct kmem_cache *cachep, struct kmem_list3 *l3,
+ struct array_cache *ac, int force, int node)
{
int tofree;
- check_spinlock_acquired_node(cachep, node);
+ if (!ac || !ac->avail)
+ return;
+
if (ac->touched && !force) {
ac->touched = 0;
} else if (ac->avail) {
tofree = force ? ac->avail : (ac->limit + 4) / 5;
if (tofree > ac->avail)
tofree = (ac->avail + 1) / 2;
+ spin_lock_irq(&l3->list_lock);
free_block(cachep, ac->entry, tofree, node);
+ spin_unlock_irq(&l3->list_lock);
ac->avail -= tofree;
memmove(ac->entry, &(ac->entry[tofree]),
sizeof(void *) * ac->avail);
}
}
-
-/*
- * Drain an array if it contains any elements taking the l3 lock only if
- * necessary.
- */
-void drain_array(struct kmem_cache *searchp, struct kmem_list3 *l3,
- struct array_cache *ac, int force, int node)
-{
- if (ac && ac->avail) {
- spin_lock_irq(&l3->list_lock);
- drain_array_locked(searchp, ac, force, node);
- spin_unlock_irq(&l3->list_lock);
- }
-}
-
/**
* cache_reap - Reclaim memory from caches.
* @unused: unused parameter
-
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