[Xen-devel] Suspend/resume of guest OSes

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

The unstable tree now contains support for dynamic suspend and resume
of guest OS instances.

Here's how it can currently be used (it's not currently hooked up to
higher-level user tools such as xenctl):

 tools/internal/xi_save_linux <domain number> <state file to write>
...this will stop the given domain, save its state, and resume
execution of the domain.

 tools/internal/xi_restore_linux <state file>
...this will create a new domain, filling it with the state saved in
<state file>. The created domain identifier will be printed to
stdout. The domain must then be resumed with 'xi_start <domain id>'.

Note that only CPU state is saved and restored --- there is currently
no support for saving and restoring IP address information, or
block-device access permissions. It is planned that this will be
implemented by higher-level tools in the near future. For now, you
will need to use tools such as 'xi_vifinit' to specify this
information for a restored guest OS (just as you do if you build a
guest using 'xi_build' instead of using 'xenctl').

 -- Keir


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