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    Subject[PATCH 27/32] nohz/cpuset: Flush cputimes on procfs stat file read
    Date
    When we read a process's procfs stat file, we need
    to flush the cputimes of the tasks running in nohz
    cpusets in case some childs in the thread group are
    running there.

    Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Anton Blanchard <anton@au1.ibm.com>
    Cc: Avi Kivity <avi@redhat.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
    Cc: Paul E . McKenney <paulmck@linux.vnet.ibm.com>
    Cc: Paul Menage <menage@google.com>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Stephen Hemminger <shemminger@vyatta.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Tim Pepper <lnxninja@linux.vnet.ibm.com>
    ---
    fs/proc/array.c | 2 ++
    1 files changed, 2 insertions(+), 0 deletions(-)

    diff --git a/fs/proc/array.c b/fs/proc/array.c
    index 9b45ee8..20e1c75 100644
    --- a/fs/proc/array.c
    +++ b/fs/proc/array.c
    @@ -397,6 +397,8 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
    cutime = cstime = utime = stime = cputime_zero;
    cgtime = gtime = cputime_zero;

    + /* For thread group times */
    + cpuset_nohz_flush_cputimes();
    if (lock_task_sighand(task, &flags)) {
    struct signal_struct *sig = task->signal;

    --
    1.7.5.4


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