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    SubjectRe: [PATCH v3 0/7] CFS Bandwidth Control
    On 10/12/2010 03:49 PM, Bharata B Rao wrote:
    > Hi,
    >
    > Its been a while since we posted CPS hard limits (aka CFS bandwidth control
    > now) patches, hence a quick recap first:
    >
    > - I have been working on CFS hard limits since last year and have posted
    > a few versions of the same (last post: http://lkml.org/lkml/2010/1/5/44)
    > - Paul Turner and Nikhil Rao meanwhile started working on CFS bandwidth
    > control and have posted a couple of versions.
    > (last post v2: http://lwn.net/Articles/385055/)
    >

    Hi, All

    I tried it, it works very good! It adds a very useful feature.
    It is very helpful for virtualization or cloud-computing I think.
    I hope the next version patchset of it will be sent and get merged soon.

    When I tested it, my box became dead several times, infrequently, and
    I don't know how to reproduce it, but next steps may help to reproduce it:

    # mount -t cgroup -o cpu xxx /mnt
    # cd /mnt
    # mkdir test
    # cd test
    # echo 5000000 > cpu.cfs_period_us
    # echo 1000000 > cpu.cfs_quota_us
    # cat /dev/zero > /dev/null &
    # echo $! > tasks
    # #make the system busy, browse websites and open many tabs in your browser etc
    # #but do NOT do things important.
    # #after some time, the system may dead. (can not respond even you type AltSysrqC)

    Thank you all
    Lai


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