On Wednesday, January 21 2009, Forrest Taylor said: > In the iso-to-disk script, one can add an overlay file. However, I > don't see that it is being used at all--livesys does not reference it at > all. It looks like the XO team passes a kernel parameter, but I haven't > seen the code to actually use it. > > My assumption is that the overlay file would be the backend storage for > an LVM snapshot. Has anyone actually used an overlay file? Any ideas > on the implementation?
The overlay gets set up in the initramfs, so see mkliveinitrd in the mkinitrd package. Basically what happens is that instead of creating a file that's backed by RAM to use as our dm-snapshot device, we set up dm-snapshot to write to the file on the USB stick instead. Jeremy -- Fedora-livecd-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/fedora-livecd-list
