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    SubjectXFS status update for May 2012
    May saw the release of Linux 3.4, including a decent sized XFS update.
    Remarkable XFS features in Linux 3.4 include moving over all metadata
    updates to use transactions, the addition of a work queue for the
    low-level allocator code to avoid stack overflows due to extreme stack
    use in the Linux VM/VFS call chain, better xattr operation tracing,
    fixes for a long-standing but hard to hit deadlock when using the XFS
    real time subvolume, and big improvements in disk quota scalability.

    The final diffstat for XFS in Linux 3.4 is:

    61 files changed, 1692 insertions(+), 2356 deletions(-)

    In the meantime the merge window for Linux 3.5 opened, and another large
    update has been merged into Linus' tree. Interesting changes in Linux
    3.5-rc1 include improved error handling on buffer write failures,
    a drastic reduction of locking overhead when doing high-IOPS direct I/O,
    removal of the old xfsbufd daemon in favor of writing most run-time
    metadata from the xfsaild daemon, deferral of CIL pushes to decouple
    user space metadata I/O from log writeback, and last but not least the
    addition of the SEEK_DATA/SEEK_HOLE lseek arguments that allow user space
    programs to deal with sparse files efficiently. Traffic on the mailing list
    has been a bit quiet in May, mostly focusing on a wide range of bug fixes,
    but little new features.

    On the user space side xfs_repair saw a few bug fixes posted to the list
    that didn't make it to the repository yet, while xfstests saw it's usual
    amount of minor bug fixes.


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