This (short) patch series is another RFC for the patch that introduces on-demand
filesystem initialisation.  In addition to the original infrastructure
implementation (with clean-ups), it changes XFS to use this new infrastructure.

I wrote a toy filesystem (testfs) to simulate scheduling/allocation delays and
to torture the mount/unmount cycles.  I didn't manage to deadlock the system
in my tests.  XFS also works as expected aswell, in that the global threads
are not created until an XFS filesystem is mounted for the first time.  When the
last XFS filesystem is unmounted, the threads go away.

Please let me know what you think!

-- Tom

fs/filesystems.c             |    2 +
fs/super.c                   |   47 +++++++++++++++++++++++++++++++++++-
fs/xfs/linux-2.6/xfs_super.c |   55 +++++++++++++++++++++++-------------------
include/linux/fs.h           |    3 ++
4 files changed, 81 insertions(+), 26 deletions(-)
    
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