| Message ID | 20130306111537.702278273@linutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Index: tip/arch/x86/kernel/process.c =================================================================== --- tip.orig/arch/x86/kernel/process.c +++ tip/arch/x86/kernel/process.c @@ -336,6 +336,18 @@ void cpu_idle(void) local_touch_nmi(); local_irq_disable(); + /* + * We detected in the wakeup path that the + * tick broadcast device expired for us, but + * we raced with the other CPU and came back + * here before it was able to fire the IPI. + * No point in going idle. + */ + if (tick_check_broadcast_expired()) { + local_irq_enable(); + continue; + } + enter_idle(); /* Don't trace irqs off for idle */
Avoid going back into deep idle if the tick broadcast IPI is about to fire. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: x86@kernel.org --- arch/x86/kernel/process.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)