1 files changed, 20 insertions, 2 deletions

diff --git a/fs/ocfs2/dlm/dlmlock.c b/fs/ocfs2/dlm/dlmlock.c
index 52578d907d9a..83a9f2972ac8 100644
--- a/fs/ocfs2/dlm/dlmlock.c
+++ b/fs/ocfs2/dlm/dlmlock.c
@@ -53,6 +53,8 @@
 #define MLOG_MASK_PREFIX ML_DLM
 #include "cluster/masklog.h"
 
+static struct kmem_cache *dlm_lock_cache = NULL;
+
 static DEFINE_SPINLOCK(dlm_cookie_lock);
 static u64 dlm_next_cookie = 1;
 
@@ -64,6 +66,22 @@ static void dlm_init_lock(struct dlm_lock *newlock, int type,
 static void dlm_lock_release(struct kref *kref);
 static void dlm_lock_detach_lockres(struct dlm_lock *lock);
 
+int dlm_init_lock_cache(void)
+{
+        dlm_lock_cache = kmem_cache_create("o2dlm_lock",
+                                           sizeof(struct dlm_lock),
+                                           0, SLAB_HWCACHE_ALIGN, NULL);
+        if (dlm_lock_cache == NULL)
+                return -ENOMEM;
+        return 0;
+}
+
+void dlm_destroy_lock_cache(void)
+{
+        if (dlm_lock_cache)
+                kmem_cache_destroy(dlm_lock_cache);
+}
+
 /* Tell us whether we can grant a new lock request.
  * locking:
  *   caller needs:  res->spinlock
@@ -353,7 +371,7 @@ static void dlm_lock_release(struct kref *kref)
                 mlog(0, "freeing kernel-allocated lksb\n");
                 kfree(lock->lksb);
         }
-        kfree(lock);
+        kmem_cache_free(dlm_lock_cache, lock);
 }
 
 /* associate a lock with it's lockres, getting a ref on the lockres */
@@ -412,7 +430,7 @@ struct dlm_lock * dlm_new_lock(int type, u8 node, u64 cookie,
         struct dlm_lock *lock;
         int kernel_allocated = 0;
 
-        lock = kzalloc(sizeof(*lock), GFP_NOFS);
+        lock = (struct dlm_lock *) kmem_cache_zalloc(dlm_lock_cache, GFP_NOFS);
         if (!lock)
                 return NULL;