commit 1af878e0497a885b6cbdd3a6d91d399f4851d99c
author Eduardo Habkost <ehabkost@redhat.com> Thu Jun 26 18:33:18 2014 -0300
committer Michael S. Tsirkin <mst@redhat.com> Sun Jun 29 18:59:41 2014 +0300
tree 2388d27edd4f4d3ad142b2bf6aafb42a997e038a
parent 2f5732e9648fcddc8759a8fd25c0b41a38352be6

numa: Keep track of NUMA nodes present on the command-line

Based on "enable sparse node numbering" patch from Nishanth Aravamudan,
but without the code to actually support sparse node IDs. This just adds
the code to keep track of present/non-present nodes on the command-line,
without changing any behavior.

Signed-off-by: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>
[Rename max_numa_node to max_numa_nodeid -Eduardo]
[Initialize max_numa_nodeid to 0 -Eduardo]
[Use MAX() macro when setting max_numa_nodeid -Eduardo]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Hu Tao <hutao@cn.fujitsu.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

include/sysemu/sysemu.h

diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index 285c45b..d8539fd 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -146,11 +146,16 @@
  */
 #define MAX_CPUMASK_BITS 255
 
-extern int nb_numa_nodes;
+extern int nb_numa_nodes;   /* Number of NUMA nodes */
+extern int max_numa_nodeid; /* Highest specified NUMA node ID, plus one.
+                             * For all nodes, nodeid < max_numa_nodeid
+                             */
+
 typedef struct node_info {
     uint64_t node_mem;
     DECLARE_BITMAP(node_cpu, MAX_CPUMASK_BITS);
     struct HostMemoryBackend *node_memdev;
+    bool present;
 } NodeInfo;
 extern NodeInfo numa_info[MAX_NODES];
 void set_numa_nodes(void);

numa.c

diff --git a/numa.c b/numa.c
index 6c2eae7..db10f95 100644
--- a/numa.c
+++ b/numa.c
@@ -106,6 +106,8 @@
         numa_info[nodenr].node_mem = object_property_get_int(o, "size", NULL);
         numa_info[nodenr].node_memdev = MEMORY_BACKEND(o);
     }
+    numa_info[nodenr].present = true;
+    max_numa_nodeid = MAX(max_numa_nodeid, nodenr + 1);
 }
 
 int numa_init_func(QemuOpts *opts, void *opaque)

vl.c

diff --git a/vl.c b/vl.c
index a1686ef..41ddcd26 100644
--- a/vl.c
+++ b/vl.c
@@ -196,6 +196,7 @@
     QTAILQ_HEAD_INITIALIZER(fw_boot_order);
 
 int nb_numa_nodes;
+int max_numa_nodeid;
 NodeInfo numa_info[MAX_NODES];
 
 uint8_t qemu_uuid[16];
@@ -2984,10 +2985,12 @@
 
     for (i = 0; i < MAX_NODES; i++) {
         numa_info[i].node_mem = 0;
+        numa_info[i].present = false;
         bitmap_zero(numa_info[i].node_cpu, MAX_CPUMASK_BITS);
     }
 
     nb_numa_nodes = 0;
+    max_numa_nodeid = 0;
     nb_nics = 0;
 
     bdrv_init_with_whitelist();