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authorSunil Mushran <sunil.mushran@oracle.com>2008-03-10 15:16:20 -0700
committerMark Fasheh <mfasheh@suse.com>2008-04-18 08:56:08 -0700
commit724bdca9b8449d9ee5f779dc27ee3d906a04508c (patch)
treec12d1028d862a58ce7a01024ba9b1f04ab157e3b /fs/ocfs2/dlm/dlmlock.c
parent12eb0035d6f0466038ef2c6e5f6f9296b9b74d91 (diff)
downloadop-kernel-dev-724bdca9b8449d9ee5f779dc27ee3d906a04508c.zip
op-kernel-dev-724bdca9b8449d9ee5f779dc27ee3d906a04508c.tar.gz
ocfs2/dlm: Create slabcaches for lock and lockres
This patch makes the o2dlm allocate memory for lockres, lockname and lock structures from slabcaches rather than kmalloc. This allows us to not only make these allocs more efficient but also allows us to track the memory being consumed by these structures. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2/dlm/dlmlock.c')
-rw-r--r--fs/ocfs2/dlm/dlmlock.c22
1 files changed, 20 insertions, 2 deletions
diff --git a/fs/ocfs2/dlm/dlmlock.c b/fs/ocfs2/dlm/dlmlock.c
index 52578d9..83a9f29 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;
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