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From: Chris Wright <chrisw@sous-sol.org>
To: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
	john stultz <johnstul@us.ibm.com>, Andi Kleen <ak@suse.de>
Cc: linux-kernel@vger.kernel.org
Subject: [RFC PATCH 4/5] x86_64: prep idle loop for dynticks
Date: Sat, 31 Mar 2007 01:31:54 -0700	[thread overview]
Message-ID: <20070331083358.409302000@sous-sol.org> (raw)
In-Reply-To: <20070331083149.997762000@sous-sol.org>

[-- Attachment #1: x86_64-dyntick-idle-updates.patch --]
[-- Type: text/plain, Size: 1107 bytes --]

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 in next patch.

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Andi Kleen <ak@suse.de>
---
 arch/x86_64/kernel/process.c |    3 +++
 1 file changed, 3 insertions(+)

--- linus-2.6.orig/arch/x86_64/kernel/process.c
+++ linus-2.6/arch/x86_64/kernel/process.c
@@ -36,6 +36,7 @@
 #include <linux/random.h>
 #include <linux/notifier.h>
 #include <linux/kprobes.h>
+#include <linux/tick.h>
 
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
@@ -201,6 +202,7 @@ void cpu_idle (void)
 	current_thread_info()->status |= TS_POLLING;
 	/* endless idle loop with no priority at all */
 	while (1) {
+		tick_nohz_stop_sched_tick();
 		while (!need_resched()) {
 			void (*idle)(void);
 
@@ -227,6 +229,7 @@ void cpu_idle (void)
 			__exit_idle();
 		}
 
+		tick_nohz_restart_sched_tick();
 		preempt_enable_no_resched();
 		schedule();
 		preempt_disable();

--

  parent reply	other threads:[~2007-03-31  8:34 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-03-31  8:31 [RFC PATCH 0/5] x86_64: enable clockevents and dynticks Chris Wright
2007-03-31  8:31 ` [RFC PATCH 1/5] x86_64: untangle asm/hpet.h from asm/timex.h Chris Wright
2007-03-31  8:31 ` [RFC PATCH 2/5] x86_64: drive set_rtc_mss from standalone timer Chris Wright
2007-03-31  8:31 ` [RFC PATCH 3/5] x86_64: clockevents drivers Chris Wright
2007-03-31  8:31 ` Chris Wright [this message]
2007-03-31  8:31 ` [RFC PATCH 5/5] x86_64: enable dynticks Chris Wright
2007-03-31  9:23 ` [RFC PATCH 0/5] x86_64: enable clockevents and dynticks Ingo Molnar
2007-03-31 16:36   ` Chris Wright
2007-03-31 16:46     ` Ingo Molnar
2007-04-01  9:22 ` Thomas Gleixner
2007-04-01 18:54   ` Chris Wright
2007-04-02 21:31     ` Thomas Gleixner
2007-04-02 21:39       ` Chris Wright
2007-04-02 21:52         ` Thomas Gleixner
2007-04-02 22:17           ` Chris Wright
2007-04-01 20:53   ` Andi Kleen
2007-04-02  7:27     ` Thomas Gleixner

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