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    Subject[PATCH 1/9] I/O bandwidth controller and BIO tracking
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    Hi all,

    These are new releases of dm-ioband and blkio-cgroup. The major change
    of these releases is that a hierarchical configuration is supported,
    a parent cgroup's bandwidth is distributed to its children. The
    hierarchical configuration is available when using dm-ioband and
    blkio-cgroup together. Please refer to the documentation included in
    this series of patches on how to use it.

    The summary of the changes are below:
    dm-ioband v1.13.0
    - Introduce a hierarchical grouping mechanism for blkio-cgroup.
    - Change the dmsetup status outputs to be similar to
    /proc/diskstats and /sys/block/dev/stat files.
    blkio-cgroup v12
    - dm-ioband can be configured in a hierarchical manner through the
    cgroup interface.
    - blkio.stat file is added which shows IO statistics per cgroup.

    TODO
    - Borrowing and lending bandwidth between a parent and children if
    spare bandwidth is available in them.

    These patches can be applied to kernel 2.6.31

    The list of the patches:
    [PATCH 1/9] I/O bandwidth controller and BIO tracking
    [PATCH 2/9] dm-ioband-1.13.0: All-in-one patch
    [PATCH 3/9] blkio-cgroup-v12: The new page_cgroup framework
    [PATCH 4/9] blkio-cgroup-v12: Refactoring io-context initialization
    [PATCH 5/9] blkio-cgroup-v12: The body of blkio-cgroup
    [PATCH 6/9] blkio-cgroup-v12: Page tracking hooks
    [PATCH 7/9] blkio-cgroup-v12: The document of blkio-cgroup
    [PATCH 8/9] blkio-cgroup-v12: Add a cgroup support to dm-ioband
    [PATCH 9/9] blkio-cgroup-v12: The document of a cgroup support for dm-ioband

    About dm-ioband
    dm-ioband is an I/O bandwidth controller implemented as a
    device-mapper driver and can control bandwidth on per partition, per
    user, per process, per virtual machine (such as KVM or Xen) basis.

    About blkio-cgruop
    blkio-cgroup is a block I/O tracking mechanism implemented on the
    cgroup memory subsystem. Using this feature the owners of any type
    of I/O can be determined. This allows dm-ioband to control block I/O
    bandwidth even when it is accepting delayed write requests.
    dm-ioband can find the cgroup of each request. It is also for
    possible that others working on I/O bandwidth throttling to use this
    functionality to control asynchronous I/O with a little enhancement.

    Please visit our website, the patches and more information are available.
    Linux Block I/O Bandwidth Control Project
    http://sourceforge.net/apps/trac/ioband/

    I'd like to get some feedbacks from the list. Any comments are
    appreciated.

    Thanks,
    Ryo Tsuruta


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