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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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> Containers@lists.linux-foundation.org
> https://lists.linux-foundation.org/mailman/listinfo/containers

--
Kirill A. Shutemov


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