Default RAM backend depends on numa_uses_legacy_mem(), which is infulenced by -numa options on CLI or set-numa-node QMP command at preconfig time. If QEMU is started with '-preconfig' without -numa, it will lead to creating default RAM backend even if later set-numa-node is used to assing RAM to NUMA nodes using 'memdev' NUMA option. That at best will waste RAM object created by default and with next patch adding a check to prevent usage of conflicting '-M memory-backend' and '-numa memdev' options, it will make QEMU error out if user tries to configure NUMA at preconfig time with memdev option, making set-numa-node unusable.
To fix issue, move preconfig loop before default RAM backend is created, so that numa_uses_legacy_mem() would take into account effects of set-numa-node commands executed at preconfig time. Signed-off-by: Igor Mammedov <imamm...@redhat.com> --- softmmu/vl.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/softmmu/vl.c b/softmmu/vl.c index afd2615fb3..8e806c9b25 100644 --- a/softmmu/vl.c +++ b/softmmu/vl.c @@ -4333,12 +4333,13 @@ void qemu_init(int argc, char **argv, char **envp) parse_numa_opts(current_machine); + /* do monitor/qmp handling at preconfig state if requested */ + qemu_main_loop(); + if (machine_class->default_ram_id && current_machine->ram_size && numa_uses_legacy_mem() && !current_machine->ram_memdev_id) { create_default_memdev(current_machine, mem_path); } - /* do monitor/qmp handling at preconfig state if requested */ - qemu_main_loop(); audio_init_audiodevs(); -- 2.18.4