Re: Back to the future.

[Kyle Moffett <mrmacman_g4@mac.com>]

On May 04, 2007, at 03:52:03, David Greaves wrote:
> Kyle Moffett wrote:
> > On May 03, 2007, at 11:10:47, Pavel Machek wrote:
> > > What happens if you try to boot and filesystems are frozen from  
> > > previous run?
> >
> > If you're just doing a fresh boot then the filesystem is already  
> > clean due to the dm freeze and so it mounts up normally.  All you  
> > need to do then is have a little startup script which purges the  
> > saved image before you fsck or remount things read-write since  
> > either case means the image is no longer safe to resume.
>
> Wouldn't it be better if freeze wrote a freeze-ID to the fs and  
> returned it? This would naturally be kept in the image and a UUID  
> mismatch would be detectable - seems safer and more flexible than  
> 'a script'.
>
> "This isn't the freeze you're looking for, move along"

Possibly, but I was referring to the _current_ behavior of the device- 
mapper freezing.  While perhaps not ideal, it's currently very easily  
usable.

Cheers,
Kyle Moffett

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