Libguestfs - Jun 2020 - Re: [PATCH] v2v: convert-windows: remove installation reference for prl_strg driver

There is an issue with removal of parallels disk paravirt driver.
Without the patch, the VM being migrated may not boot on the
desination with BSOD: 0x7b.

The patch is a workaround to prevent the BSOD.

Signed-off-by: Denis Plotnikov <dplotnikov@virtuozzo.com>
---
 v2v/convert_windows.ml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/v2v/convert_windows.ml b/v2v/convert_windows.ml
index 4511c53c3..706202499 100644
--- a/v2v/convert_windows.ml
+++ b/v2v/convert_windows.ml
@@ -469,6 +469,8 @@ echo uninstalling Xen PV driver
         let fb_script = "\
 @echo off
 
+REG DELETE HKLM\\System\\CurrentControlSet\\Services\\prl_strg\\DriverInfo /v
RefCount /f
+
 echo uninstalling Parallels guest tools
 " ^ uninst ^
 (* ERROR_SUCCESS_REBOOT_REQUIRED == 3010 is OK too *)
-- 
2.17.0

On Thu, May 21, 2020 at 04:54:21PM +0300, Denis Plotnikov
wrote:
> There is an issue with removal of parallels disk paravirt driver.
> Without the patch, the VM being migrated may not boot on the
> desination with BSOD: 0x7b.
> 
> The patch is a workaround to prevent the BSOD.
> 
> Signed-off-by: Denis Plotnikov <dplotnikov@virtuozzo.com>
> ---
>  v2v/convert_windows.ml | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/v2v/convert_windows.ml b/v2v/convert_windows.ml
> index 4511c53c3..706202499 100644
> --- a/v2v/convert_windows.ml
> +++ b/v2v/convert_windows.ml
> @@ -469,6 +469,8 @@ echo uninstalling Xen PV driver
>          let fb_script = "\
>  @echo off
>  
> +REG DELETE HKLM\\System\\CurrentControlSet\\Services\\prl_strg\\DriverInfo
/v RefCount /f
> +
>  echo uninstalling Parallels guest tools
>  " ^ uninst ^
>  (* ERROR_SUCCESS_REBOOT_REQUIRED == 3010 is OK too *)
ACK, I'll push this in a minute.

I looked at your other package yesterday but it was more than I could
process in the few minutes I had available :-(  I'll take a longer look
at it soon.  It does appear to be generally OK.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-df lists disk usage of guests without needing to install any
software inside the virtual machine.  Supports Linux and Windows.
http://people.redhat.com/~rjones/virt-df/

On Fri, Jun 05, 2020 at 01:14:57PM +0300, Denis Plotnikov
wrote:
> Did you have some time to review my other patch about uefi-linux
> migration improvement?
Yeah I need to do this one and the Python 3 patch still ...  I'll
try to get round to both today.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-p2v converts physical machines to virtual machines.  Boot with a
live CD or over the network (PXE) and turn machines into KVM guests.
http://libguestfs.org/virt-v2v