Commit 1e4dda08 authored Aug 13, 2014 by Oleg Nesterov Committed by Ingo Molnar Aug 20, 2014

sched: Change thread_group_cputime() to use for_each_thread()



Change thread_group_cputime() to use for_each_thread() instead of
buggy while_each_thread(). This also makes the pid_alive() check
unnecessary.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: Frank Mayhar <fmayhar@google.com>
Cc: Frederic Weisbecker <fweisbec@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Sanjay Rao <srao@redhat.com>
Cc: Larry Woodman <lwoodman@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/20140813192000.GA19327@redhat.com


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent d38e83c7

kernel/sched/cputime.c

+2 −8

Original line number	Diff line number	Diff line
		@@ -294,18 +294,12 @@ void thread_group_cputime(struct task_struct tsk, struct task_cputime times)
		times->sum_exec_runtime = sig->sum_sched_runtime;

		rcu_read_lock();
		/* make sure we can trust tsk->thread_group list */
		if (!likely(pid_alive(tsk)))
		goto out;

		t = tsk;
		do {
		for_each_thread(tsk, t) {
		task_cputime(t, &utime, &stime);
		times->utime += utime;
		times->stime += stime;
		times->sum_exec_runtime += task_sched_runtime(t);
		} while_each_thread(tsk, t);
		out:
		}
		rcu_read_unlock();
		}