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    SubjectRe: [patch] cpusets: allow PF_THREAD_BOUND kworkers to escape from a cpuset
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    On Fri, 2011-09-23 at 15:00 +0800, Li Zefan wrote:

    > To make the code more self-explanatory, I think this is a bit better:
    >
    > if (... && cont != cont->top_cgroup)
    >

    Done, your ACK added as well.

    kworkers can be born in a cpuset, leaving them adrift on an unsinkable ship.
    Allow them to be moved to the root cpuset so the cpuset can be destroyed.

    Signed-off-by: Mike Galbraith <efault@gmx.de>
    Acked-by: Li Zefan <lizf@cn.fujitsu.com>

    diff --git a/kernel/cpuset.c b/kernel/cpuset.c
    index 10131fd..b26f4c4 100644
    --- a/kernel/cpuset.c
    +++ b/kernel/cpuset.c
    @@ -1384,7 +1384,7 @@ static int cpuset_can_attach(struct cgroup_subsys *ss, struct cgroup *cont,
    * set_cpus_allowed_ptr() on all attached tasks before cpus_allowed may
    * be changed.
    */
    - if (tsk->flags & PF_THREAD_BOUND)
    + if (tsk->flags & PF_THREAD_BOUND && cont != cont->top_cgroup)
    return -EINVAL;

    return 0;



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