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    SubjectRe: [PATCH] Documentation: cgroups: Add notes on removing PIDs from tasks and cgroups requiring setup
    On Wed, Mar 09, 2011 at 04:09:29PM -0500, Eric B Munson wrote:
    > The cgroup documentation does not specify how a process can be removed from a
    > particular group. This patch adds a note at the end of the simple example
    > about how this is done. Also, some cgroups (like cpusets) require user input
    > before a new group can be used. This is noted in the patch as well.
    >
    > Signed-off-by: Eric B Munson <emunson@mgebm.net>
    > ---
    > Documentation/cgroups/cgroups.txt | 7 +++++++
    > 1 files changed, 7 insertions(+), 0 deletions(-)
    >
    > diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt
    > index 44b8b7a..6c975a1 100644
    > --- a/Documentation/cgroups/cgroups.txt
    > +++ b/Documentation/cgroups/cgroups.txt
    > @@ -349,6 +349,10 @@ To mount a cgroup hierarchy with all available subsystems, type:
    > The "xxx" is not interpreted by the cgroup code, but will appear in
    > /proc/mounts so may be any useful identifying string that you like.
    >
    > +Note: Some subsystems do not work without some user input first. For instance,
    > +if cpusets are enabled the user will have to populate the cpus and mems files
    > +for each new cgroup created before that group can be used.
    > +
    > To mount a cgroup hierarchy with just the cpuset and memory
    > subsystems, type:
    > # mount -t cgroup -o cpuset,memory hier1 /dev/cgroup
    > @@ -426,6 +430,9 @@ You can attach the current shell task by echoing 0:
    >
    > # echo 0 > tasks
    >
    > +Note: To remove a task from a cgroup you must write its PID to the root
    > +tasks file.
    > +

    'to tasks file of another cgroup.'?

    > 2.3 Mounting hierarchies by name
    > --------------------------------
    >
    > --
    > 1.7.1
    >
    > _______________________________________________
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    > https://lists.linux-foundation.org/mailman/listinfo/containers

    --
    Kirill A. Shutemov


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