On Thu, Dec 14, 2000 at 03:02:10PM -0500, Kevin Lawton wrote:
> Calvin Smith wrote:
> >
> > If plex86 can save / restore a state then would it be possible to save in
> > the middle of an mp3 song and when the state is restored to have the mp3
> > song continue playing right where it left off without having to hit play
> > again? Or would the devices be in a 'stopped' condition.
>
> Well, this demonstrates one of the issues with save/restore; when
> you have external state involved. Ideally, if the mp3 song is on
> the disk image (or partition) and it hasn't been deleted/modified,
> the devices would be init'd to the previous state and the file
> would resume playing.
>
> The assumptions are that no changes have been made to any
> of the VM's state, including the disk image file. And that
> exactly the same config options are used, the same compile
> options, etc. We might want to checksum certain files like
> the disk image file, to make sure they haven't been modified.
> But that of course, takes time.
We'll have to checksum the disk images but we can probably
save all relevant options in the snapshot so there should
be no problem with that.
Another solution would be to save the disk image in the
snapshot. This would allow to debug plex86 much more
easily since you could save the state just before the
bug happens and continue until the bug's gone.
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