See bug number 1007089 overlayfs alters /proc/self/exe link(s), making result a dead link.
Test script, from #40: ( set -e 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 kill $! umount /mnt/test 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 > Oneiric). > > 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 > AUFS. > > Thanks, > Leann Ogasawara > > [1] https://lkml.org/lkml/2012/2/28/223 > > -- ubuntu-devel mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel
