ceph: rewrite msgpool using mempool_t

Since we don't need to maintain large pools of messages, we can just
use the standard mempool_t.  We maintain a msgpool 'wrapper' because we
need the mempool_t* in the alloc function, and mempool gives us only
pool_data.

Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 2 insertions, 6 deletions

diff --git a/fs/ceph/msgpool.h b/fs/ceph/msgpool.h
index bc834bfcd720..62a61c7fca08 100644
--- a/fs/ceph/msgpool.h
+++ b/fs/ceph/msgpool.h
@@ -1,6 +1,7 @@
 #ifndef _FS_CEPH_MSGPOOL
 #define _FS_CEPH_MSGPOOL
 
+#include <linux/mempool.h>
 #include "messenger.h"
 
 /*
@@ -8,18 +9,13 @@
  * avoid unexpected OOM conditions.
  */
 struct ceph_msgpool {
-        spinlock_t lock;
+        mempool_t *pool;
         int front_len;          /* preallocated payload size */
-        struct list_head msgs;  /* msgs in the pool; each has 1 ref */
-        int num, min;           /* cur, min # msgs in the pool */
-        bool blocking;
-        wait_queue_head_t wait;
 };
 
 extern int ceph_msgpool_init(struct ceph_msgpool *pool,
                              int front_len, int size, bool blocking);
 extern void ceph_msgpool_destroy(struct ceph_msgpool *pool);
-extern int ceph_msgpool_resv(struct ceph_msgpool *, int delta);
 extern struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *,
                                          int front_len);
 extern void ceph_msgpool_put(struct ceph_msgpool *, struct ceph_msg *);