Messages in this thread Patch in this message | | | Date | Fri, 29 Sep 2006 23:58:37 -0000 | From | Thomas Gleixner <> | Subject | [patch 18/23] dynticks: i386 arch code |
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From: Ingo Molnar <mingo@elte.hu>
prepare i386 for dyntick: idle handler callbacks and IRQ callback.
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> ---- arch/i386/kernel/nmi.c | 3 ++- arch/i386/kernel/process.c | 27 +++++++++++++++------------ 2 files changed, 17 insertions(+), 13 deletions(-)
Index: linux-2.6.18-mm2/arch/i386/kernel/nmi.c =================================================================== --- linux-2.6.18-mm2.orig/arch/i386/kernel/nmi.c 2006-09-30 01:41:10.000000000 +0200 +++ linux-2.6.18-mm2/arch/i386/kernel/nmi.c 2006-09-30 01:41:19.000000000 +0200 @@ -20,6 +20,7 @@ #include <linux/sysdev.h> #include <linux/sysctl.h> #include <linux/percpu.h> +#include <linux/kernel_stat.h> #include <linux/dmi.h> #include <linux/kprobes.h> @@ -908,7 +909,7 @@ __kprobes int nmi_watchdog_tick(struct p touched = 1; } - sum = per_cpu(irq_stat, cpu).apic_timer_irqs; + sum = per_cpu(irq_stat, cpu).apic_timer_irqs + kstat_irqs(0); /* if the apic timer isn't firing, this cpu isn't doing much */ if (!touched && last_irq_sums[cpu] == sum) { Index: linux-2.6.18-mm2/arch/i386/kernel/process.c =================================================================== --- linux-2.6.18-mm2.orig/arch/i386/kernel/process.c 2006-09-30 01:41:10.000000000 +0200 +++ linux-2.6.18-mm2/arch/i386/kernel/process.c 2006-09-30 01:41:19.000000000 +0200 @@ -178,24 +178,27 @@ void cpu_idle(void) /* endless idle loop with no priority at all */ while (1) { - while (!need_resched()) { - void (*idle)(void); + if (!hrtimer_stop_sched_tick()) { + while (!need_resched()) { + void (*idle)(void); - if (__get_cpu_var(cpu_idle_state)) - __get_cpu_var(cpu_idle_state) = 0; + if (__get_cpu_var(cpu_idle_state)) + __get_cpu_var(cpu_idle_state) = 0; - rmb(); - idle = pm_idle; + rmb(); + idle = pm_idle; - if (!idle) - idle = default_idle; + if (!idle) + idle = default_idle; - if (cpu_is_offline(cpu)) - play_dead(); + if (cpu_is_offline(cpu)) + play_dead(); - __get_cpu_var(irq_stat).idle_timestamp = jiffies; - idle(); + __get_cpu_var(irq_stat).idle_timestamp = jiffies; + idle(); + } } + hrtimer_restart_sched_tick(); preempt_enable_no_resched(); schedule(); preempt_disable(); --
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