lkml.org 
[lkml]   [2007]   [Jul]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[patch-mm 25/33] x86_64: prepare idle loop for dynamic ticks
From: Chris Wright <chrisw@sous-sol.org>

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: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

---
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();
--

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-07-15 18:17    [from the cache]
©2003-2011 Jasper Spaans