[RFC] AUFS disabled for 12.04
cheako at mikemestnik.net
Thu Aug 2 00:07:16 UTC 2012
See bug number 1007089
overlayfs alters /proc/self/exe link(s), making result a dead link.
Test script, from #40:
mkdir -p /mnt/test /tmp/usr
mount none /mnt/test -t overlayfs -o lowerdir=/usr,upperdir=/tmp/usr
/mnt/test/bin/tail -f /dev/null&
ls -lart /proc/$!/exe
rmdir /mnt/test /tmp/usr
# If a red broken link to/bin/tail is printed then the bug exists. If
the link points to /mnt/test/bin/tail then there is no bug in the
currently running kernel.
On 02/29/12 10:57, Leann Ogasawara wrote:
> 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 . 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
>  https://lkml.org/lkml/2012/2/28/223
More information about the ubuntu-devel