• Eric W. Biederman's avatar
    pidns: Use task_active_pid_ns where appropriate · 17cf22c3
    Eric W. Biederman authored
    The expressions tsk->nsproxy->pid_ns and task_active_pid_ns
    aka ns_of_pid(task_pid(tsk)) should have the same number of
    cache line misses with the practical difference that
    ns_of_pid(task_pid(tsk)) is released later in a processes life.
    
    Furthermore by using task_active_pid_ns it becomes trivial
    to write an unshare implementation for the the pid namespace.
    
    So I have used task_active_pid_ns everywhere I can.
    
    In fork since the pid has not yet been attached to the
    process I use ns_of_pid, to achieve the same effect.
    Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
    17cf22c3
fork.c 44 KB