[PATCH 3/6] cgroup: introduce cgroup_taskset and use it in subsys->can_attach(), cancel_attach() and attach()

Paul Menage paul at paulmenage.org
Thu Aug 25 02:32:59 PDT 2011

On Tue, Aug 23, 2011 at 3:19 PM, Tejun Heo <tj at kernel.org> wrote:
> +Called prior to moving one or more tasks into a cgroup; if the
> +subsystem returns an error, this will abort the attach operation.
> + at tset contains the tasks to be attached and is guaranteed to have at
> +least one task in it. If there are multiple, it's guaranteed that all
> +are from the same thread group, @tset contains all tasks from the
> +group whether they're actually switching cgroup or not, and the first
> +task is the leader.

I'd reformat this a bit for clarity:

If there are multiple tasks in the taskset, then:
  - it's guaranteed that all are from the same thread group
  - @tset contains all tasks from the thread group whether or not
they're switching cgroup
  - the first task is the leader

Acked-by: Paul Menage <paul at paulmenage.org>

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