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    SubjectRe: [RFC][PATCH 01/20] pid: Intoduce the concept of a wid (wait id)
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    "Serge E. Hallyn" <serue@us.ibm.com> writes:

    > Quoting Eric W. Biederman (ebiederm@xmission.com):
    >>
    >> The wait id is the pid returned by wait. For tasks that span 2
    >> namespaces (i.e. the process leaders of the pid namespaces) their
    >> parent knows the task by a different PID value than the task knows
    >> itself. Having a child with PID == 1 would be confusing.
    >
    > Is it possible here to have wid conflicts?
    >
    > Does that matter?
    >
    > Looking at sysvinit, it seems that it does. If the wid happens
    > to conflict with the pid of one of the children init knows about,
    > it could confuse init.

    No. The wid is in the pspace of the parent, and the pid is in the processes
    pspace. Add is in any pspace are unique.

    Eric
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