vgoyal added a new comment to an issue you are following:
``
So this relies on that fact that atomic users will not use devicemapper graph driver. If
they really need to use devicemapper, they will need to add additional disk. (Which
requires extra effort and planning).
So has this been established that overlayfs is working well for container workload and
most of the users don't have the need to go back to devicemapper.
In F26, we wanted to retain capability to easily go back to devicemapper if things
don't work out well with overlayfs. Given F26 is not GA, I guess we don't even
have that data to make a decision?
``
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https://pagure.io/atomic-wg/issue/281