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    SubjectRe: [PATCH O/4] Block I/O tracking
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    Hi,

    > > # mount -t cgroup -o bio none /cgroup/bio
    > >
    > > Then, you make new bio cgroups and put some processes in them.
    > >
    > > # mkdir /cgroup/bio/bgroup1
    > > # mkdir /cgroup/bio/bgroup2
    > > # echo 1234 /cgroup/bio/bgroup1/tasks
    > > # echo 5678 /cgroup/bio/bgroup1/tasks
    > >
    > > Now you check the ids of the bio cgroups which you just created.
    > >
    > > # cat /cgroup/bio/bgroup1/bio.id
    > > 1
    > > # cat /cgroup/bio/bgroup2/bio.id
    > > 2
    > >
    > > Finally, you can attach the cgroups to "ioband1" and assign them weights.
    > >
    > > # dmsetup message ioband1 0 type cgroup
    > > # dmsetup message ioband1 0 attach 1
    > > # dmsetup message ioband1 0 attach 2
    > > # dmsetup message ioband1 0 weight 1:30
    > > # dmsetup message ioband1 0 weight 2:60
    > >
    > > You can find the manual of dm-ioband at
    > > http://people.valinux.co.jp/~ryov/dm-ioband/manual/index.html.
    > > But the user interface for the bio cgroup is temporal and it will be
    > > changed after the io_context support.
    > >
    > I'm grad if these some kinds of params rather than 'id' are also shown
    > under cgroup.

    You mean each bio cgroup has to have a lot of files which shows the status
    of the cgroup or allows you to control the cgroup.
    I think this should be done after the cgroup bio subsystem supports
    io_context since the interface will be changed to support it.

    > Thanks,
    > -Kame

    Thank you,
    Hirokazu Takahashi.


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