revert -r20254 : By default NUMA node 0 is not necessarily STARPU_MAIN_RAM

+ Fix NUMA physid

src/core/topology.c

@@ -1783,12 +1783,19 @@ _starpu_init_workers_binding (struct _starpu_machine_config *config, int no_mp_c
 	/* Each device is initialized,
 	 * giving it a memory node and a core bind id.
 	 */
-	nb_numa_nodes = 0;
+	nb_numa_nodes = 1;
 	unsigned n;
 	unsigned numa_init[STARPU_MAXNUMANODES];
-	for (n=0; n<STARPU_MAXNUMANODES; n++)
+
+	/* Consider MAIN_RAM as NUMA node logid 0 */
+	numa_init[0] = 1;
+	numa_memory_nodes[0] = ram_memory_node;
+	numa_numalogid[ram_memory_node] = 0;
+	numa_numaphysid[ram_memory_node] = _starpu_numa_logid_get_physid(0);	
+
+	for (n=1; n<STARPU_MAXNUMANODES; n++)
 	{
-		numa_init[n] = 0;
+		numa_init[n] = 1;
 	}	
 #if defined(STARPU_USE_CUDA) || defined(STARPU_SIMGRID)
 	unsigned cuda_init[STARPU_MAXCUDADEVS] = { };