[PATCH 0/3] de_thread() should update ->real_start_time

[Oleg Nesterov]

1/3 is the obvious bugfix, 2 and 3 are minor cleanups

I am wondering, can't we kill task->real_start_time? What if we
simply change copy_process

	-	do_posix_clock_monotonic_gettime(&p->start_time);
	+	get_monotonic_boottime(&p->start_time);

?

Afaics, this will only affect do_acct_process() and bacct_add_tsk(),
but do we really want to exclude the suspended time in this case?


Another user of ->start_time is cgroup.c and it looks wrong... But
the change above should not make any difference.

Oleg.

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