[v3,1/2] spapr: skip configuration section during migration of older machines

Message ID 20160218113218.9760.89211.stgit@bahia.huguette.org
State New
Headers show

Commit Message

Greg Kurz Feb. 18, 2016, 11:32 a.m.
Since QEMU 2.4, we have a configuration section in the migration stream.
This must be skipped for older machines, like it is already done for x86.

This patch fixes the migration of pseries-2.3 from/to QEMU 2.3, but it
breaks migration of the same machine from/to QEMU 2.4/2.4.1/2.5. We do
that anyway because QEMU 2.3 is likely to be more widely deployed than
newer QEMU versions.

Fixes: 61964c23e5ddd5a33f15699e45ce126f879e3e33
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
---
 hw/ppc/spapr.c |    1 +
 1 file changed, 1 insertion(+)

Comments

Laurent Vivier Feb. 18, 2016, 7:57 p.m. | #1
On 18/02/2016 12:32, Greg Kurz wrote:
> Since QEMU 2.4, we have a configuration section in the migration stream.
> This must be skipped for older machines, like it is already done for x86.
> 
> This patch fixes the migration of pseries-2.3 from/to QEMU 2.3, but it
> breaks migration of the same machine from/to QEMU 2.4/2.4.1/2.5. We do
> that anyway because QEMU 2.3 is likely to be more widely deployed than
> newer QEMU versions.
> 
> Fixes: 61964c23e5ddd5a33f15699e45ce126f879e3e33
> Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>

Reviewed-by: Laurent Vivier <lvivier@redhat.com>

> ---
>  hw/ppc/spapr.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index 5bd8fd3ef842..bca7cb8a5d27 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -2446,6 +2446,7 @@ static void spapr_machine_2_3_instance_options(MachineState *machine)
>      spapr_machine_2_4_instance_options(machine);
>      savevm_skip_section_footers();
>      global_state_set_optional();
> +    savevm_skip_configuration();
>  }
>  
>  static void spapr_machine_2_3_class_options(MachineClass *mc)
>
Juan Quintela Feb. 23, 2016, 8:23 a.m. | #2
Greg Kurz <gkurz@linux.vnet.ibm.com> wrote:
> Since QEMU 2.4, we have a configuration section in the migration stream.
> This must be skipped for older machines, like it is already done for x86.
>
> This patch fixes the migration of pseries-2.3 from/to QEMU 2.3, but it
> breaks migration of the same machine from/to QEMU 2.4/2.4.1/2.5. We do
> that anyway because QEMU 2.3 is likely to be more widely deployed than
> newer QEMU versions.
>
> Fixes: 61964c23e5ddd5a33f15699e45ce126f879e3e33
> Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>

Reviewed-by: Juan Quintela <quintela@redhat.com>

Patch

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 5bd8fd3ef842..bca7cb8a5d27 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -2446,6 +2446,7 @@  static void spapr_machine_2_3_instance_options(MachineState *machine)
     spapr_machine_2_4_instance_options(machine);
     savevm_skip_section_footers();
     global_state_set_optional();
+    savevm_skip_configuration();
 }
 
 static void spapr_machine_2_3_class_options(MachineClass *mc)