Re: [Xen-devel] XL: pv guests dont reboot after migration (xen4.1.2-rc2-pre)

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2011-09-23 at 08:38 +0100, Andreas Olsowski wrote:
I guess the core of the problem is somewhere around this:
>  >xc: error: 0-length read: Internal error
>  >xc: error: read_exact_timed failed (read rc: 0, errno: 0): Internal error
>  >xc: error: read: p2m_size (0 = Success): Internal error
> 

It smells like on reboot it is trying to receive another incoming
migration, instead of restarting the domain it already has.

This (untested) might help:

diff -r d7b14b76f1eb tools/libxl/xl_cmdimpl.c
--- a/tools/libxl/xl_cmdimpl.c  Thu Sep 22 14:26:08 2011 +0100
+++ b/tools/libxl/xl_cmdimpl.c  Fri Sep 23 08:59:36 2011 +0100
@@ -1516,6 +1516,11 @@ start:
         ret = libxl_domain_create_restore(ctx, &d_config,
                                             cb, &child_console_pid,
                                             &domid, restore_fd);
+        /*
+         * On subsequent reboot etc we should create the domain, not
+         * restore/migrate-receive it again.
+         */
+        restore_file = NULL;
     }else{
         ret = libxl_domain_create_new(ctx, &d_config,
                                         cb, &child_console_pid, &domid);

Ian.



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