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authorChristoph Lameter <clameter@engr.sgi.com>2006-03-22 11:09:06 +0300
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-22 18:54:05 +0300
commitaab2207cf8d9c343b6b5f0e4d27e1732f8618d14 (patch)
treedeb851a556ac7d2339a5bc83985a33fe126321ee /mm
parent35386e3b0f876bf194982f48f027af0c216499ce (diff)
downloadlinux-aab2207cf8d9c343b6b5f0e4d27e1732f8618d14.tar.xz
[PATCH] slab: make drain_array more universal by adding more parameters
And a parameter to drain_array to control the freeing of all objects and then use drain_array() to replace instances of drain_array_locked with drain_array. Doing so will avoid taking locks in those locations if the arrays are empty. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/slab.c20
1 files changed, 11 insertions, 9 deletions
diff --git a/mm/slab.c b/mm/slab.c
index 1845c0127394..d73b38e7d7e8 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2126,6 +2126,10 @@ static void check_spinlock_acquired_node(struct kmem_cache *cachep, int node)
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);
+
static void do_drain(void *arg)
{
struct kmem_cache *cachep = arg;
@@ -2150,9 +2154,7 @@ static void drain_cpu_caches(struct kmem_cache *cachep)
for_each_online_node(node) {
l3 = cachep->nodelists[node];
if (l3) {
- spin_lock_irq(&l3->list_lock);
- drain_array_locked(cachep, l3->shared, 1, node);
- spin_unlock_irq(&l3->list_lock);
+ drain_array(cachep, l3, l3->shared, 1, node);
if (l3->alien)
drain_alien_cache(cachep, l3->alien);
}
@@ -3545,12 +3547,11 @@ static void drain_array_locked(struct kmem_cache *cachep,
* necessary.
*/
static void drain_array(struct kmem_cache *searchp, struct kmem_list3 *l3,
- struct array_cache *ac)
+ struct array_cache *ac, int force, int node)
{
if (ac && ac->avail) {
spin_lock_irq(&l3->list_lock);
- drain_array_locked(searchp, ac, 0,
- numa_node_id());
+ drain_array_locked(searchp, ac, force, node);
spin_unlock_irq(&l3->list_lock);
}
}
@@ -3571,6 +3572,7 @@ static void cache_reap(void *unused)
{
struct list_head *walk;
struct kmem_list3 *l3;
+ int node = numa_node_id();
if (!mutex_trylock(&cache_chain_mutex)) {
/* Give up. Setup the next iteration. */
@@ -3593,11 +3595,11 @@ static void cache_reap(void *unused)
* have established with reasonable certainty that
* we can do some work if the lock was obtained.
*/
- l3 = searchp->nodelists[numa_node_id()];
+ l3 = searchp->nodelists[node];
reap_alien(searchp, l3);
- drain_array(searchp, l3, cpu_cache_get(searchp));
+ drain_array(searchp, l3, cpu_cache_get(searchp), 0, node);
/*
* These are racy checks but it does not matter
@@ -3608,7 +3610,7 @@ static void cache_reap(void *unused)
l3->next_reap = jiffies + REAPTIMEOUT_LIST3;
- drain_array(searchp, l3, l3->shared);
+ drain_array(searchp, l3, l3->shared, 0, node);
if (l3->free_touched) {
l3->free_touched = 0;