[PATCH] tick-management: dyntick / highres functionality

[net-next-2.6.git] / kernel / softirq.c

diff --git a/kernel/softirq.c b/kernel/softirq.c
index 14e1a14f94d20538f269049642d8a455f6dfb9ef..8b75008e2bd84bc91db15681896ab1a631091378 100644 (file)
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -17,6 +17,7 @@
 #include <linux/kthread.h>
 #include <linux/rcupdate.h>
 #include <linux/smp.h>
+#include <linux/tick.h>
 
 #include <asm/irq.h>
 /*
@@ -278,9 +279,11 @@ EXPORT_SYMBOL(do_softirq);
  */
 void irq_enter(void)
 {
-       account_system_vtime(current);
-       add_preempt_count(HARDIRQ_OFFSET);
-       trace_hardirq_enter();
+       __irq_enter();
+#ifdef CONFIG_NO_HZ
+       if (idle_cpu(smp_processor_id()))
+               tick_nohz_update_jiffies();
+#endif
 }
 
 #ifdef __ARCH_IRQ_EXIT_IRQS_DISABLED
@@ -299,6 +302,12 @@ void irq_exit(void)
        sub_preempt_count(IRQ_EXIT_OFFSET);
        if (!in_interrupt() && local_softirq_pending())
                invoke_softirq();
+
+#ifdef CONFIG_NO_HZ
+       /* Make sure that timer wheel updates are propagated */
+       if (!in_interrupt() && idle_cpu(smp_processor_id()) && !need_resched())
+               tick_nohz_stop_sched_tick();
+#endif
        preempt_enable_no_resched();
 }