* [PATCH] posix_cpu_timers_exit_group: do not use thread_group_cputimer()
@ 2009-06-17 13:36 Stanislaw Gruszka
2009-06-17 14:02 ` Oleg Nesterov
0 siblings, 1 reply; 2+ messages in thread
From: Stanislaw Gruszka @ 2009-06-17 13:36 UTC (permalink / raw)
To: Andrew Morton
Cc: Peter Zijlstra, Roland McGrath, Vitaly Mayatskikh, linux-kernel,
Oleg Nesterov
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 form task
and signal structs.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
---
kernel/posix-cpu-timers.c | 7 ++++---
1 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index bece7c0..e33a21c 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -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)
--
1.5.5.6
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] posix_cpu_timers_exit_group: do not use thread_group_cputimer()
2009-06-17 13:36 [PATCH] posix_cpu_timers_exit_group: do not use thread_group_cputimer() Stanislaw Gruszka
@ 2009-06-17 14:02 ` Oleg Nesterov
0 siblings, 0 replies; 2+ messages in thread
From: Oleg Nesterov @ 2009-06-17 14:02 UTC (permalink / raw)
To: Stanislaw Gruszka
Cc: Andrew Morton, Peter Zijlstra, Roland McGrath, Vitaly Mayatskikh,
linux-kernel
On 06/17, Stanislaw Gruszka wrote:
>
> 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 form task
> and signal structs.
>
> Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
> ---
> kernel/posix-cpu-timers.c | 7 ++++---
> 1 files changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
> index bece7c0..e33a21c 100644
> --- a/kernel/posix-cpu-timers.c
> +++ b/kernel/posix-cpu-timers.c
> @@ -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);
> }
I think this is correct.
Oleg.
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2009-06-17 14:07 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2009-06-17 13:36 [PATCH] posix_cpu_timers_exit_group: do not use thread_group_cputimer() Stanislaw Gruszka
2009-06-17 14:02 ` Oleg Nesterov
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.