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    SubjectRe: [PATCH 0/16] Pid namespaces
    Pavel Emelianov [xemul@openvz.org] wrote:
    | This is "submition for inclusion" of hierarchical, not kconfig
    | configurable, zero overheaded ;) pid namespaces.
    |
    | The overall idea is the following:
    |
    | The namespace are organized as a tree - once a task is cloned
    | with CLONE_NEWPIDS (yes, I've also switched to it :) the new

    Can you really clone() a pid namespace all by itself ?
    copy_namespaces() has the following:


    if (!(flags & (CLONE_NEWNS | CLONE_NEWUTS | CLONE_NEWIPC | CLONE_NEWUSER)))
    return 0;

    doesn't it mean you cannot create a pid namespace using clone() unless
    one of the above flags are also specified ?

    unshare_nsproxy_namespaces() has the following correct check:

    if (!(unshare_flags & (CLONE_NEWNS | CLONE_NEWUTS | CLONE_NEWIPC |
    CLONE_NEWUSER | CLONE_NEWPIDS)))
    return 0;

    BTW, why not use CLONE_NEWPID and drop the 'S' ? We don't have 'S' with
    other namespaces.

    Suka
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