commit 57924bcd87cb03cc21ebd7efed880d16ca048dce
author Igor Mammedov <imammedo@redhat.com> Thu Mar 19 17:09:21 2015 +0000
committer Eduardo Habkost <ehabkost@redhat.com> Thu Mar 19 16:12:09 2015 -0300
tree 6c64141a2db6ef60b6445a204d633dbb7608063a
parent 3ef7197505e483e2f28c5fbd6ed54b4061221200

numa: introduce machine callback for VCPU to node mapping

Current default round-robin way of distributing VCPUs among
NUMA nodes might be wrong in case on multi-core/threads
CPUs. Making guests confused wrt topology where cores from
the same socket are on different nodes.

Allow a machine to override default mapping by providing
 MachineClass::cpu_index_to_socket_id()
callback which would allow it group VCPUs from a socket
on the same NUMA node.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

vl.c

diff --git a/vl.c b/vl.c
index 69617d6..75ec292 100644
--- a/vl.c
+++ b/vl.c
@@ -4170,7 +4170,7 @@
     default_drive(default_floppy, snapshot, IF_FLOPPY, 0, FD_OPTS);
     default_drive(default_sdcard, snapshot, IF_SD, 0, SD_OPTS);
 
-    parse_numa_opts();
+    parse_numa_opts(machine_class);
 
     if (qemu_opts_foreach(qemu_find_opts("mon"), mon_init_func, NULL, 1) != 0) {
         exit(1);