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sched/cputime: Fix accounting on multi-threaded processes

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Recent commit 6fac4829 ("cputime: Use accessors to read task
cputime stats") introduced a bug, where we account many times
the cputime of the first thread, instead of cputimes of all
the different threads.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20130404085740.GA2495@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Stanislaw Gruszka 2013-04-04 10:57:48 +02:00 committed by Ingo Molnar
parent fd9b86d37a
commit e614b3332a
1 changed files with 1 additions and 1 deletions
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2
kernel/sched/cputime.c
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@ -310,7 +310,7 @@ void thread_group_cputime(struct task_struct *tsk, struct task_cputime *times)
t = tsk; t = tsk;
do { do {
task_cputime(tsk, &utime, &stime); task_cputime(t, &utime, &stime);
times->utime += utime; times->utime += utime;
times->stime += stime; times->stime += stime;
times->sum_exec_runtime += task_sched_runtime(t); times->sum_exec_runtime += task_sched_runtime(t);