From: Frederic Weisbecker <fweis...@gmail.com>
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 <fweis...@gmail.com>
Cc: Alessio Igor Bogani <abog...@kernel.org>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Avi Kivity <a...@redhat.com>
Cc: Chris Metcalf <cmetc...@tilera.com>
Cc: Christoph Lameter <c...@linux.com>
Cc: Daniel Lezcano <daniel.lezc...@linaro.org>
Cc: Geoff Levand <ge...@infradead.org>
Cc: Gilad Ben Yossef <gi...@benyossef.com>
Cc: Hakan Akkan <hakanak...@gmail.com>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Kevin Hilman <khil...@ti.com>
Cc: Max Krasnyansky <m...@qualcomm.com>
Cc: Paul E. McKenney <paul...@linux.vnet.ibm.com>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Stephen Hemminger <shemmin...@vyatta.com>
Cc: Steven Rostedt <rost...@goodmis.org>
Cc: Sven-Thorsten Dietrich <thebigcorporat...@gmail.com>
Cc: Thomas Gleixner <t...@linutronix.de>
---
fs/proc/array.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/proc/array.c b/fs/proc/array.c
index c1c207c..f7e1fdc 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -406,6 +406,8 @@ static int do_task_stat(struct seq_file *m, struct
pid_namespace *ns,
cutime = cstime = utime = stime = 0;
cgtime = gtime = 0;
+ /* For thread group times */
+ cpuset_nohz_flush_cputimes();
if (lock_task_sighand(task, &flags)) {
struct signal_struct *sig = task->signal;
--
1.7.10.4
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