[PATCH zesty 0/2] Fix hangs in docker on xfs with aufs storage driver

[Seth Forshee]

BugLink: http://bugs.launchpad.net/bugs/1709749

Running yum in Centos/RHEL containers causes the process to hang in
uninterruptible sleep. The upstream aufs developer pointed us to the
fix, but this did not apply cleanly. In this case it seems safer to me
to include the prerequisite than to attempt a backport. Since both
patches have been in upstream aufs and in artful for a while now they
should be well tested and unlikely to introduce regressions.

The following patches for zesty include the fix and the prerequisite,
the latter of which having conflicts which were resovled  based on the
conflict resolution used when it was merged into the aufs-standalone
tree.

Thanks,
Seth


J. R. Okajima (2):
  aufs: for v4.5, use vfs_clone_file_range() in copy-up
  aufs: bugfix, for v4.10, copy-up on XFS branch

 fs/aufs/cpup.c  | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 fs/aufs/vfsub.h | 16 +++++++++++++++
 2 files changed, 73 insertions(+), 3 deletions(-)