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freeze_processes
2007 Jan 17
6
Ehancement to domU suspend/resume
...spend request, it should invoke driver suspend
method of owned physical devices. Before that, one other necessary
step is to freeze all processes since some may still hold critical
resource. In this case, we need borrow some Linux PM stuff into
xen suspend path, something like:
Smp_suspend();
freeze_processes();
device_suspend();
device_power_down();
xenbus_suspend();
...
HYPERVISOR_suspend(virt_to_mfn(xen_start_info));
...
xenbus_resume();
device_power_up();
device_resume();
thaw_processes();
smp_resume();
It may be more difficult if we want to support wake-on-LAN when
that NIC is assig...