From: Chris Wright <[email protected]>
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 <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
---
arch/x86_64/kernel/process.c | 3 +++
1 file changed, 3 insertions(+)
Index: linux-2.6.22-rc6-mm/arch/x86_64/kernel/process.c
===================================================================
--- linux-2.6.22-rc6-mm.orig/arch/x86_64/kernel/process.c 2007-07-15 17:01:24.000000000 +0200
+++ linux-2.6.22-rc6-mm/arch/x86_64/kernel/process.c 2007-07-15 17:42:36.000000000 +0200
@@ -37,6 +37,7 @@
#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 +209,7 @@ void cpu_idle (void)
__get_cpu_var(cpu_idle_state) = 0;
check_pgt_cache();
+ tick_nohz_stop_sched_tick();
rmb();
idle = pm_idle;
if (!idle)
@@ -228,6 +230,7 @@ void cpu_idle (void)
__exit_idle();
}
+ tick_nohz_restart_sched_tick();
preempt_enable_no_resched();
schedule();
preempt_disable();
--
-
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