Hi, Wenchao
In order to determine whether my test method or my system environment have
problems,
I want to test the patch on the qemu version which you used.
You can give me a rough version number.
You told me that patch is based on the version before qemu-1.3. But in your
patch,
there is a diff:
--- a/savevm.c
+++ b/savevm.c
@@ -698,7 +698,7 @@ int qemu_get_byte(QEMUFile *f)
return result;
}
-static int64_t qemu_ftell(QEMUFile *f)
+int64_t qemu_ftell(QEMUFile *f)
{
return f->buf_offset - f->buf_size + f->buf_index;
}
@@ -2061,32 +2061,10 @@ out:
return ret;
}
But before qemu-1.3, the "qemu_ftell" function is not a static function.
In qemu-1.3 and the following version, the "qemu_ftell" function is change
to a static function. So I'm not sure which version you used.
Which tool you used to connect the VM, Spice, VNC or others?
When I use the Spice, after I "loadvm" the snapshot which is create by
the "migrate image:" command, the qemu-kvm will be error or crash.
But when I use VNC, it is OK.
How do you think this issue? Please give me some suggestion.
And can you give me the detailed "qemu-kvm" command, which you used to
start the VM.
I want compare your "qemu-kvm" command and my.
Best Regards
Liu Ji
-----------------------------------------------------
2013/2/19 Wenchao Xia <xiaw...@linux.vnet.ibm.com>
> Hi, Liu Ji
> Thanks for trying my trival patch. That patch is based on the version
> before qemu-1.3, and since qemu have important change about migration
> from Juan after that, So I think it would not work since 1.3.
>
> I am trying to fix the size problem now, and then reimplement a formal
> patch of "live savevm" after that, as part of the incremental backup
> enhancement, you can take a look of the plan at:
> http://wiki.qemu.org/Features/VMSnapshotEnchancement
> Pls forgive me about the latency of the work, I have just come back
> from vacation.:)
>
> > Hello Wenchao Xia，
> > I am very interested in your "live backup vm" patch of qemu, which have
> > been sent to qemu-devel mail-list in "8 Dec 2012".
> > http://lists.gnu.org/archive/html/qemu-devel/2012-12/msg00800.html
> >
> > I have test your patch in qemu-1.3.1, but I have two problems:
> >
> > 1) After I exec the "migrate image:" command, although the CPU of VM is
> not
> > suspended, the running of VM is very slow. It is very difficult to
> operate
> > the VM
> >
> > by Spice.
> > 2) When I "loadvm" the snapshot which is create by the "migrate image:"
> > command, the Qemu output error. I change the version of qemu to 1.3.0,
> the
> > "loadvm"
> >
> > caused a crash.
> > Could you tell me which baseline version of qemu you used? And do you
> have
> > the same problems?
> > Do you have optimized the patch, and can you provide the latest patch for
> > me?
> >
> > Thanks.
> >
>
>
> --
> Best Regards
>
> Wenchao Xia
>
>
