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posix-timers: Store PID type in the timer

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instead of re-evaluating the signal delivery mode everywhere.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/20241105064213.519086500@linutronix.de
This commit is contained in:
Thomas Gleixner
2024-11-05 09:14:41 +01:00
parent 54f1dd642f
commit ef1c5bcd6d
2 changed files with 8 additions and 3 deletions
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2
include/linux/posix-timers.h
View File

@@ -5,6 +5,7 @@
#include <linux/alarmtimer.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/pid.h>
#include <linux/posix-timers_types.h>
#include <linux/rcuref.h>
#include <linux/spinlock.h>
@@ -180,6 +181,7 @@ struct k_itimer {
s64 it_overrun_last;
unsigned int it_signal_seq;
int it_sigev_notify;
enum pid_type it_pid_type;
ktime_t it_interval;
struct signal_struct *it_signal;
union {

9
kernel/time/posix-timers.c
View File

@@ -298,7 +298,6 @@ out:
int posix_timer_queue_signal(struct k_itimer *timr)
{
enum posix_timer_state state = POSIX_TIMER_DISARMED;
enum pid_type type;
int ret;
lockdep_assert_held(&timr->it_lock);
@@ -308,8 +307,7 @@ int posix_timer_queue_signal(struct k_itimer *timr)
timr->it_status = state;
type = !(timr->it_sigev_notify & SIGEV_THREAD_ID) ? PIDTYPE_TGID : PIDTYPE_PID;
ret = send_sigqueue(timr->sigq, timr->it_pid, type, timr->it_signal_seq);
ret = send_sigqueue(timr->sigq, timr->it_pid, timr->it_pid_type, timr->it_signal_seq);
/* If we failed to send the signal the timer stops. */
return ret > 0;
}
@@ -496,6 +494,11 @@ static int do_timer_create(clockid_t which_clock, struct sigevent *event,
new_timer->it_pid = get_pid(task_tgid(current));
}
if (new_timer->it_sigev_notify & SIGEV_THREAD_ID)
new_timer->it_pid_type = PIDTYPE_PID;
else
new_timer->it_pid_type = PIDTYPE_TGID;
new_timer->sigq->info.si_tid = new_timer->it_id;
new_timer->sigq->info.si_code = SI_TIMER;