| From: Thomas Gleixner <tglx@linutronix.de> |
| Date: Fri, 3 Jul 2009 08:44:44 -0500 |
| Subject: signals: Do not wakeup self |
| |
| Signals which are delivered by current to current can do without |
| waking up current :) |
| |
| Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
| |
| --- |
| kernel/signal.c | 3 +++ |
| 1 file changed, 3 insertions(+) |
| |
| Index: linux-stable/kernel/signal.c |
| =================================================================== |
| --- linux-stable.orig/kernel/signal.c |
| +++ linux-stable/kernel/signal.c |
| @@ -684,6 +684,9 @@ void signal_wake_up(struct task_struct * |
| |
| set_tsk_thread_flag(t, TIF_SIGPENDING); |
| |
| + if (unlikely(t == current)) |
| + return; |
| + |
| /* |
| * For SIGKILL, we want to wake it up in the stopped/traced/killable |
| * case. We don't check t->state here because there is a race with it |
