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Re: [libvirt] [PATCH] migrate VMs between different-endian hosts



On 04/14/2011 12:53 PM, Eric Blake wrote:
On 04/09/2011 09:48 AM, Stefan Berger wrote:
This patch enables the migration of Qemu VMs between hosts of different
endianess. I tested this by migrating a i686 VM between a x86 and ppc64
host.

I am converting the 'int's in the VM's state header to uint32_t assuming
this doesn't break compatibility with existing deployments other than
Linux.

Signed-off-by: Stefan Berger<stefanb linux vnet ibm com>

---
  src/qemu/qemu_driver.c |   25 ++++++++++++++++++++-----
  1 file changed, 20 insertions(+), 5 deletions(-)

Index: libvirt-acl/src/qemu/qemu_driver.c
===================================================================
--- libvirt-acl.orig/src/qemu/qemu_driver.c
+++ libvirt-acl/src/qemu/qemu_driver.c
@@ -43,6 +43,7 @@
  #include<sys/wait.h>
  #include<sys/ioctl.h>
  #include<sys/un.h>
+#include<byteswap.h>
This won't work unless you also modify bootstrap.conf to include the
gnulib byteswap module.

ACK with that nit fixed.

I don't think it's necessary to include it there:

# rpm -q --whatprovides /usr/include/byteswap.h
glibc-headers-2.12.90-21.x86_64

   Stefan


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