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Commit 02290683 authored by Chris Wright's avatar Chris Wright Committed by Thomas Gleixner
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x86_64: prepare idle loop for dynamic ticks 



Add tick_nohz_{stop,restart}_sched_tick to idle loop in prepartion for turning
on dynticks.  These are just noops until NO_HZ is enabled.

Signed-off-by: default avatarChris Wright <chrisw@sous-sol.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarArjan van de Ven <arjan@linux.intel.com>
parent c4d58cbd

arch/x86/kernel/process_64.c

+4 −0
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@ 
#include <linux/notifier.h>

#include <linux/kprobes.h>

#include <linux/kdebug.h>

#include <linux/tick.h>



#include <asm/uaccess.h>

#include <asm/pgtable.h>
@@ -208,6 +209,8 @@ void cpu_idle (void) 
			if (__get_cpu_var(cpu_idle_state))

				__get_cpu_var(cpu_idle_state) = 0;



			tick_nohz_stop_sched_tick();



			rmb();

			idle = pm_idle;

			if (!idle)
@@ -228,6 +231,7 @@ void cpu_idle (void) 
			__exit_idle();

		}



		tick_nohz_restart_sched_tick();

		preempt_enable_no_resched();

		schedule();

		preempt_disable();