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| author | Chris Wright <chrisw@sous-sol.org> | 2007-10-12 21:04:07 (GMT) |
|---|---|---|
| committer | Thomas Gleixner <tglx@inhelltoy.tec.linutronix.de> | 2007-10-12 21:04:07 (GMT) |
| commit | 02290683343391a50f45599710295dafa2ddd018 (patch) | |
| tree | 4db7593d48f60e3301dd85ca13379aeab818f98b /arch/x86 | |
| parent | c4d58cbd158dc9b30c55c0e3881ae7c6b8843d5a (diff) | |
| download | linux-02290683343391a50f45599710295dafa2ddd018.tar.xz | |
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: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/process_64.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index 9895655..6f9dbbe 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -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(); |