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    SubjectRe: [-mm] Add an owner to the mm_struct (v2)
    On Fri, 28 Mar 2008 20:15:28 +0900
    KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:

    > Now,
    > - css_get(memcgrp) is called at mm_struct initialization.
    > - css_put(memcgrp) is called at mm_struct freeing.
    >
    > How about
    > - css_get(memcgrp) is called at task_struct initialization.
    > - css_put(memcgrp) is called at task_struct freeing.
    >
    > Because
    > 1. we find mem_cgroup by mm->owner, after this.
    > 2. generic group interface have exit() and clone() callback interface.
    >
    > mem_cgroup will not be freed until rmdir(), anyway.
    >
    Ignore above. As Paul pointed out, reference count from task is not necessary.

    Thanks,
    -Kame



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