performance/io-cache: move mem-pool initialisation to init.

  - mem-pool is global structure which is stored in ioc-inode-table and hence
    can be initialised in init.

Change-Id: I215118d61e17805c9f3e78cb8e8297e17cc1117d
BUG: 3608
Reviewed-on: http://review.gluster.com/484
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Amar Tumballi <amar@gluster.com>
Reviewed-by: Vijay Bellur <vijay@gluster.com>

1 files changed, 13 insertions, 26 deletions

diff --git a/xlators/performance/io-cache/src/io-cache.c b/xlators/performance/io-cache/src/io-cache.c
index 230842389cc..830386e0206 100644
--- a/xlators/performance/io-cache/src/io-cache.c
+++ b/xlators/performance/io-cache/src/io-cache.c
@@ -1080,7 +1080,6 @@ ioc_readv (call_frame_t *frame, xlator_t *this, fd_t *fd,
         ioc_local_t *local         = NULL;
         uint32_t     weight        = 0;
         ioc_table_t *table         = NULL;
-        uint32_t     num_pages     = 0;
         int32_t      op_errno      = -1;
 
         if (!this) {
@@ -1107,29 +1106,6 @@ ioc_readv (call_frame_t *frame, xlator_t *this, fd_t *fd,
                 goto out;
         }
 
-
-        ioc_table_lock (table);
-        {
-                if (!table->mem_pool) {
-
-                        num_pages = (table->cache_size / table->page_size)
-                                + ((table->cache_size % table->page_size)
-                                   ? 1 : 0);
-
-                        table->mem_pool
-                                =  mem_pool_new (rbthash_entry_t, num_pages);
-
-                        if (!table->mem_pool) {
-                                gf_log (this->name, GF_LOG_ERROR,
-                                        "Unable to allocate mem_pool");
-                                op_errno = ENOMEM;
-                                ioc_table_unlock (table);
-                                goto out;
-                        }
-                }
-        }
-        ioc_table_unlock (table);
-
         ioc_inode_lock (ioc_inode);
         {
                 if (!ioc_inode->cache.page_table) {
@@ -1727,6 +1703,7 @@ init (xlator_t *this)
         glusterfs_ctx_t *ctx               = NULL;
         data_t          *data              = 0;
         char            *def_val           = NULL;
+        uint32_t         num_pages         = 0;
 
         xl_options = this->options;
 
@@ -1800,7 +1777,6 @@ init (xlator_t *this)
                 }
         }
 
-
         data = dict_get (xl_options, "cache-timeout");
         if (data) {
                 table->cache_timeout = data_to_uint32 (data);
@@ -1842,7 +1818,6 @@ init (xlator_t *this)
                 }
         }
 
-
         data = dict_get (xl_options, "min-file-size");
         if (data)
                 tmp = data_to_str (data);
@@ -1918,6 +1893,18 @@ init (xlator_t *this)
 
         pthread_mutex_init (&table->table_lock, NULL);
         this->private = table;
+
+        num_pages = (table->cache_size / table->page_size)
+                + ((table->cache_size % table->page_size)
+                   ? 1 : 0);
+
+        table->mem_pool = mem_pool_new (rbthash_entry_t, num_pages);
+        if (!table->mem_pool) {
+                gf_log (this->name, GF_LOG_ERROR,
+                        "Unable to allocate mem_pool");
+                goto out;
+        }
+
         ret = 0;
 
         ctx = this->ctx;