| From 36c39487b1868fe8a0e2f3ce46c46bcdd9a7a903 Mon Sep 17 00:00:00 2001 |
| From: Ingo Molnar <mingo@elte.hu> |
| Date: Fri, 3 Jul 2009 08:29:57 -0500 |
| Subject: [PATCH] genirq: disable irqpoll on -rt |
| |
| commit 0e6e7446187add6cbd03c8ff7b12226bffb761c5 in tip. |
| |
| Creates long latencies for no value |
| |
| Signed-off-by: Ingo Molnar <mingo@elte.hu> |
| Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
| |
| diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c |
| index 4e4a758..a9a6628 100644 |
| --- a/kernel/irq/spurious.c |
| +++ b/kernel/irq/spurious.c |
| @@ -278,6 +278,11 @@ MODULE_PARM_DESC(noirqdebug, "Disable irq lockup detection when true"); |
| |
| static int __init irqfixup_setup(char *str) |
| { |
| +#ifdef CONFIG_PREEMPT_RT |
| + printk(KERN_WARNING "irqfixup boot option not supported " |
| + "w/ CONFIG_PREEMPT_RT\n"); |
| + return 1; |
| +#endif |
| irqfixup = 1; |
| printk(KERN_WARNING "Misrouted IRQ fixup support enabled.\n"); |
| printk(KERN_WARNING "This may impact system performance.\n"); |
| @@ -290,6 +295,11 @@ module_param(irqfixup, int, 0644); |
| |
| static int __init irqpoll_setup(char *str) |
| { |
| +#ifdef CONFIG_PREEMPT_RT |
| + printk(KERN_WARNING "irqpoll boot option not supported " |
| + "w/ CONFIG_PREEMPT_RT\n"); |
| + return 1; |
| +#endif |
| irqfixup = 2; |
| printk(KERN_WARNING "Misrouted IRQ fixup and polling support " |
| "enabled\n"); |
| -- |
| 1.7.1.1 |
| |
