libglusterfs/rbtree: change rbthash_init_table to take no of expected entries in the hash table as argument.

- the expected number of entries is used to create the memory pool of the hash
    table. Having constant macro for this purpose is not suitable since different
    users of rbtree based hash table store different number of entries in the
    table.

Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 335 (Io-cache optimization)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=335

1 files changed, 9 insertions, 4 deletions

diff --git a/xlators/performance/io-cache/src/ioc-inode.c b/xlators/performance/io-cache/src/ioc-inode.c
index 356afc583b9..e647b318342 100644
--- a/xlators/performance/io-cache/src/ioc-inode.c
+++ b/xlators/performance/io-cache/src/ioc-inode.c
@@ -166,18 +166,23 @@ ioc_inode_wakeup (call_frame_t *frame, ioc_inode_t *ioc_inode,
 ioc_inode_t *
 ioc_inode_update (ioc_table_t *table, inode_t *inode, uint32_t weight)
 {
-	ioc_inode_t *ioc_inode = NULL;
-        
+	ioc_inode_t     *ioc_inode   = NULL;
+        unsigned long    no_of_pages = 0;
+
         ioc_inode = CALLOC (1, sizeof (ioc_inode_t));
         if (ioc_inode == NULL) {
                 goto out;
         }
   
 	ioc_inode->table = table;
- 
+
+        no_of_pages = (table->cache_size / table->page_size)
+                + ((table->cache_size % table->page_size) ? 1 : 0);
+
 	/* initialize the list for pages */
         ioc_inode->cache.page_table = rbthash_table_init (IOC_PAGE_TABLE_BUCKET_COUNT,
-                                                          ioc_hashfn, NULL);
+                                                          ioc_hashfn, NULL,
+                                                          no_of_pages);
         if (ioc_inode->cache.page_table == NULL) {
                 FREE (ioc_inode);
                 ioc_inode = NULL;