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Commit 17d42c1c authored by Stanislaw Gruszka's avatar Stanislaw Gruszka Committed by Ingo Molnar
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posix_cpu_timers_exit_group(): Do not use thread_group_cputimer() 



When the process exits we don't have to run new cputimer nor
use running one (as it not accounts when tsk->exit_state != 0)
to get process CPU times.  As there is only one thread we can
just use CPU times fields from task and signal structs.

Signed-off-by: default avatarStanislaw Gruszka <sgruszka@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Roland McGrath <roland@redhat.com>
Cc: Vitaly Mayatskikh <vmayatsk@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 7b2aa037

kernel/posix-cpu-timers.c

+4 −3
Original line number Diff line number Diff line
@@ -521,11 +521,12 @@ void posix_cpu_timers_exit(struct task_struct *tsk) 
}

void posix_cpu_timers_exit_group(struct task_struct *tsk)

{

	struct task_cputime cputime;

	struct signal_struct *const sig = tsk->signal;



	thread_group_cputimer(tsk, &cputime);

	cleanup_timers(tsk->signal->cpu_timers,

		       cputime.utime, cputime.stime, cputime.sum_exec_runtime);

		       cputime_add(tsk->utime, sig->utime),

		       cputime_add(tsk->stime, sig->stime),

		       tsk->se.sum_exec_runtime + sig->sum_sched_runtime);

}



static void clear_dead_task(struct k_itimer *timer, union cpu_time_count now)