On 03/25/2011 07:27 AM, Jason Wang wrote:
We need to keep DIR register unchanged across migration, but currently it depends on the media_changed flags from block layer and we do not save/restore it which could let the guest driver think the floppy have changed after migration. To fix this, a new filed media_changed in FDrive strcutre was introduced in order to save and restore the it from block layer through pre_save/post_load callbacks.
I guess you can avoid saving if the media changed flag is zero, too (which should be the common case after the guest has booted, right?).
Paolo
