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Old 02-29-2012, 03:57 PM
Leann Ogasawara
Default AUFS disabled for 12.04

Hi All,

Early in the Precise Pangolin 12.04 development cycle, we disabled
support for AUFS in the kernel. This decision was made at UDS. The
reasoning behind this decision included:

* AUFS is not upstream. Despite previous efforts from it's
maintainer, it does not appear it will ever land upstream.
* AUFS is a maintenance burden for the Ubuntu Kernel Team due to
the fact that it is not upstream.
* Support for OverlayFS has been available since Oneiric. We have
been encouraging migration to OverlayFS. The installer has
already transitioned to using OverlayFS (which was done in

We've noted the disablement of AUFS in every Technical Overview for each
12.04 milestone. However, we felt it was also necessary to send a
widespread notification.

For anyone struggling with the dropped support of AUFS, we would like to
hear from you. We'd be particularly interested in specific use case
scenarios where OverlayFS is not meeting the needs/requirements
previously met by AUFS. We are already aware of some inotify issues
with OverlayFS [1]. We are curious if there are any other specific
cases where people are experiencing issues with OverlayFS. We'd like to
gather any compelling evidence to support the requests to re-enable

Leann Ogasawara

[1] https://lkml.org/lkml/2012/2/28/223

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