branches/zip: Free the buffer pool at shutdown.

buf_pool_free(): New function: Free all chunks of the buffer pool.

innobase_shutdown_for_mysql(): Call buf_pool_free() right before
ut_free_all_mem().

buf/buf0buf.c

@@ -961,6 +961,29 @@ buf_pool_init(void)
 	return(buf_pool);
 }
 
+/************************************************************************
+Frees the buffer pool at shutdown.  This must not be invoked before
+freeing all mutexes. */
+
+void
+buf_pool_free(void)
+/*===============*/
+{
+	buf_chunk_t*	chunk;
+	buf_chunk_t*	chunks;
+
+	chunks = buf_pool->chunks;
+	chunk = chunks + buf_pool->n_chunks;
+
+	while (--chunk >= chunks) {
+		/* Bypass the checks of buf_chunk_free(), since they
+		would fail at shutdown. */
+		os_mem_free_large(chunk->mem, chunk->mem_size);
+	}
+
+	buf_pool->n_chunks = 0;
+}
+
 /************************************************************************
 Relocate a buffer control block.  Relocates the block on the LRU list
 and in buf_pool->page_hash.  Does not relocate bpage->list. */

include/buf0buf.h

@@ -86,6 +86,14 @@ buf_pool_init(void);
 /*===============*/
 				/* out, own: buf_pool object, NULL if not
 				enough memory or error */
+/************************************************************************
+Frees the buffer pool at shutdown.  This must not be invoked before
+freeing all mutexes. */
+
+void
+buf_pool_free(void);
+/*===============*/
+
 /************************************************************************
 Relocate a buffer control block.  Relocates the block on the LRU list
 and in buf_pool->page_hash.  Does not relocate bpage->list. */

srv/srv0start.c

@@ -1895,6 +1895,7 @@ innobase_shutdown_for_mysql(void)
 	/* 5. Free all allocated memory and the os_fast_mutex created in
 	ut0mem.c */
 
+	buf_pool_free();
 	ut_free_all_mem();
 
 	if (os_thread_count != 0