Bootup time regression from 2.6.27 to 2.6.28-rc3+

Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Lukas Hejtmanek]

Hello Rafael,

not sure whether this is already reported or not. However, in 2.6.28-rc3
I discovered about 10 secs delay before mounting the root fs and running init
(not sure whether the delay is caused by mount or init). It did not appear in
2.6.27. I did not try any previous 2.6.28-rcX.

This is from dmesg in 2.6.28-rc3. 

[    7.880966] IBM TrackPoint firmware: 0x0e, buttons: 3/3
[    8.103116] input: TPPS/2 IBM TrackPoint as
/devices/platform/i8042/serio1/serio2/input/input7
[   28.993523] kjournald starting.  Commit interval 5 seconds
[   28.993581] EXT3-fs: mounted filesystem with ordered data mode.
[   28.993638] VFS: Mounted root (ext3 filesystem) readonly.
[   28.993675] Freeing unused kernel memory: 332k freed
[   37.697648] uhci_hcd: USB Universal Host Controller Interface driver
[   37.697740] uhci_hcd 0000:00:1a.0: PCI INT A -> GSI 20 (level, low) -> IRQ
20
[   37.697779] uhci_hcd 0000:00:1a.0: setting latency timer to 64
[   37.697785] uhci_hcd 0000:00:1a.0: UHCI Host Controller
[   37.698005] drivers/usb/core/inode.c: creating file 'devices'
[   37.698008] drivers/usb/core/inode.c: creating file '001'
[   37.698131] uhci_hcd 0000:00:1a.0: new USB bus registered, assigned bus
number 1
[   37.698176] uhci_hcd 0000:00:1a.0: detected 2 ports
[   37.698205] uhci_hcd 0000:00:1a.0: uhci_check_and_reset_hc: cmd = 0x0000


This is from 2.6.27 kernel:
[    8.215972] IBM TrackPoint firmware: 0x0e, buttons: 3/3
[    8.452174] input: TPPS/2 IBM TrackPoint as /devices/platform/i8042/serio1/serio2/input/input7
[    9.016605] kjournald starting.  Commit interval 5 seconds
[    9.016634] EXT3-fs: mounted filesystem with ordered data mode.
[    9.016663] VFS: Mounted root (ext3 filesystem) readonly.
[    9.016756] Freeing unused kernel memory: 296k freed
[   18.963410] HDA Intel 0000:00:1b.0: PCI INT B -> GSI 17 (level, low) -> IRQ 17
[   18.963461] hda_intel: probe_mask set to 0x1 for device 17aa:20ac
[   18.969726] USB Universal Host Controller Interface driver v3.0
[   18.987703] e1000e: Intel(R) PRO/1000 Network Driver - 0.3.3.3-k6
[   18.987732] e1000e: Copyright (c) 1999-2008 Intel Corporation.
[   19.023978] sdhci: Secure Digital Host Controller Interface driver
[   19.024017] sdhci: Copyright(c) Pierre Ossman
[   19.084812] input: PC Speaker as /devices/platform/pcspkr/input/input8
[   19.366304] e1000e 0000:00:19.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
[   19.372539] ACPI: WMI: Mapper loaded
[   19.570065] 0000:00:19.0: eth0: (PCI Express:2.5GB/s:Width x1) 00:1a:6b:d2:bd:81
[   19.570105] 0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection
[   19.570172] 0000:00:19.0: eth0: MAC: 4, PHY: 6, PBA No: ffffff-0ff
[   19.570301] uhci_hcd 0000:00:1a.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
[   19.570343] uhci_hcd 0000:00:1a.0: UHCI Host Controller

-- 
Lukáš Hejtmánek

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Rafael J. Wysocki]

On Tuesday, 4 of November 2008, Lukas Hejtmanek wrote:
> Hello Rafael,

Hi,

> not sure whether this is already reported or not. However, in 2.6.28-rc3
> I discovered about 10 secs delay before mounting the root fs and running init
> (not sure whether the delay is caused by mount or init). It did not appear in
> 2.6.27. I did not try any previous 2.6.28-rcX.

Added to the list of recent regressions as
http://bugzilla.kernel.org/show_bug.cgi?id=11987

Thanks,
Rafael


> This is from dmesg in 2.6.28-rc3. 
> 
> [    7.880966] IBM TrackPoint firmware: 0x0e, buttons: 3/3
> [    8.103116] input: TPPS/2 IBM TrackPoint as
> /devices/platform/i8042/serio1/serio2/input/input7
> [   28.993523] kjournald starting.  Commit interval 5 seconds
> [   28.993581] EXT3-fs: mounted filesystem with ordered data mode.
> [   28.993638] VFS: Mounted root (ext3 filesystem) readonly.
> [   28.993675] Freeing unused kernel memory: 332k freed
> [   37.697648] uhci_hcd: USB Universal Host Controller Interface driver
> [   37.697740] uhci_hcd 0000:00:1a.0: PCI INT A -> GSI 20 (level, low) -> IRQ
> 20
> [   37.697779] uhci_hcd 0000:00:1a.0: setting latency timer to 64
> [   37.697785] uhci_hcd 0000:00:1a.0: UHCI Host Controller
> [   37.698005] drivers/usb/core/inode.c: creating file 'devices'
> [   37.698008] drivers/usb/core/inode.c: creating file '001'
> [   37.698131] uhci_hcd 0000:00:1a.0: new USB bus registered, assigned bus
> number 1
> [   37.698176] uhci_hcd 0000:00:1a.0: detected 2 ports
> [   37.698205] uhci_hcd 0000:00:1a.0: uhci_check_and_reset_hc: cmd = 0x0000
> 
> 
> This is from 2.6.27 kernel:
> [    8.215972] IBM TrackPoint firmware: 0x0e, buttons: 3/3
> [    8.452174] input: TPPS/2 IBM TrackPoint as /devices/platform/i8042/serio1/serio2/input/input7
> [    9.016605] kjournald starting.  Commit interval 5 seconds
> [    9.016634] EXT3-fs: mounted filesystem with ordered data mode.
> [    9.016663] VFS: Mounted root (ext3 filesystem) readonly.
> [    9.016756] Freeing unused kernel memory: 296k freed
> [   18.963410] HDA Intel 0000:00:1b.0: PCI INT B -> GSI 17 (level, low) -> IRQ 17
> [   18.963461] hda_intel: probe_mask set to 0x1 for device 17aa:20ac
> [   18.969726] USB Universal Host Controller Interface driver v3.0
> [   18.987703] e1000e: Intel(R) PRO/1000 Network Driver - 0.3.3.3-k6
> [   18.987732] e1000e: Copyright (c) 1999-2008 Intel Corporation.
> [   19.023978] sdhci: Secure Digital Host Controller Interface driver
> [   19.024017] sdhci: Copyright(c) Pierre Ossman
> [   19.084812] input: PC Speaker as /devices/platform/pcspkr/input/input8
> [   19.366304] e1000e 0000:00:19.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
> [   19.372539] ACPI: WMI: Mapper loaded
> [   19.570065] 0000:00:19.0: eth0: (PCI Express:2.5GB/s:Width x1) 00:1a:6b:d2:bd:81
> [   19.570105] 0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection
> [   19.570172] 0000:00:19.0: eth0: MAC: 4, PHY: 6, PBA No: ffffff-0ff
> [   19.570301] uhci_hcd 0000:00:1a.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
> [   19.570343] uhci_hcd 0000:00:1a.0: UHCI Host Controller
> 



-- 
Everyone knows that debugging is twice as hard as writing a program
in the first place.  So if you're as clever as you can be when you write it,
how will you ever debug it? --- Brian Kernighan

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Arjan van de Ven]

On Sun, 9 Nov 2008 01:06:04 +0100
"Rafael J. Wysocki" <rjw@sisk.pl> wrote:

> On Tuesday, 4 of November 2008, Lukas Hejtmanek wrote:
> > Hello Rafael,
> 
> Hi,
> 
> > not sure whether this is already reported or not. However, in
> > 2.6.28-rc3 I discovered about 10 secs delay before mounting the
> > root fs and running init (not sure whether the delay is caused by
> > mount or init). It did not appear in 2.6.27. I did not try any
> > previous 2.6.28-rcX.
> 


do you have RAID autoprobing enabled ?
raid autoprobing requires that all devices have been discovered,
to avoid getting partial RAID arrays and other nasty things...

it's CONFIG_MD_AUTODETECT


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Lukas Hejtmanek]

On Sat, Nov 08, 2008 at 08:55:32PM -0800, Arjan van de Ven wrote:
> do you have RAID autoprobing enabled ?
> raid autoprobing requires that all devices have been discovered,
> to avoid getting partial RAID arrays and other nasty things...
> 
> it's CONFIG_MD_AUTODETECT

# CONFIG_MD is not set

I do not have MD at all.

Moreover, I discovered that I have to hit a keyboard several times during the
boot to boot up.

The delay depends on keyboard hit. If I do not touch the keyboard, it waits
forever.. Looks like something needs an interrupt..

-- 
Lukáš Hejtmánek

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Marcin Slusarz]

On Sun, Nov 09, 2008 at 09:56:49AM +0100, Lukas Hejtmanek wrote:
> On Sat, Nov 08, 2008 at 08:55:32PM -0800, Arjan van de Ven wrote:
> > do you have RAID autoprobing enabled ?
> > raid autoprobing requires that all devices have been discovered,
> > to avoid getting partial RAID arrays and other nasty things...
> > 
> > it's CONFIG_MD_AUTODETECT
> 
> # CONFIG_MD is not set
> 
> I do not have MD at all.
> 
> Moreover, I discovered that I have to hit a keyboard several times during the
> boot to boot up.
> 
> The delay depends on keyboard hit. If I do not touch the keyboard, it waits
> forever.. Looks like something needs an interrupt..

Do you have NO_HZ enabled?
(Cc'ing Thomas)

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Lukas Hejtmanek]

On Sun, Nov 09, 2008 at 11:52:02AM +0100, Marcin Slusarz wrote:
> > Moreover, I discovered that I have to hit a keyboard several times during the
> > boot to boot up.
> > 
> > The delay depends on keyboard hit. If I do not touch the keyboard, it waits
> > forever.. Looks like something needs an interrupt..
> 
> Do you have NO_HZ enabled?
> (Cc'ing Thomas)

indeed, I have. Should I try it without NO_HZ?

-- 
Lukáš Hejtmánek

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Rafael J. Wysocki]

On Sunday, 9 of November 2008, Lukas Hejtmanek wrote:
> On Sun, Nov 09, 2008 at 11:52:02AM +0100, Marcin Slusarz wrote:
> > > Moreover, I discovered that I have to hit a keyboard several times during the
> > > boot to boot up.
> > > 
> > > The delay depends on keyboard hit. If I do not touch the keyboard, it waits
> > > forever.. Looks like something needs an interrupt..
> > 
> > Do you have NO_HZ enabled?
> > (Cc'ing Thomas)
> 
> indeed, I have. Should I try it without NO_HZ?

Yes, please.

Thanks,
Rafael


-- 
Everyone knows that debugging is twice as hard as writing a program
in the first place.  So if you're as clever as you can be when you write it,
how will you ever debug it? --- Brian Kernighan

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Frans Pop]

Lukas Hejtmanek wrote:
> Moreover, I discovered that I have to hit a keyboard several times
> during the boot to boot up.
> 
> The delay depends on keyboard hit. If I do not touch the keyboard, it
> waits forever.. Looks like something needs an interrupt..

That sounds very much like the issues described in this thread:
http://lkml.org/lkml/2008/10/28/226

Do you use LUKS encryption and/or LVM?

Cheers,
FJP

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Lukas Hejtmanek]

On Sun, Nov 09, 2008 at 03:20:12PM +0100, Frans Pop wrote:
> That sounds very much like the issues described in this thread:
> http://lkml.org/lkml/2008/10/28/226

yes, looks pretty much the same but it appears on a plain libata driver.

> Do you use LUKS encryption and/or LVM?

nope. just AHCI driver & ext3 file system.

-- 
Lukáš Hejtmánek

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Lukas Hejtmanek]

On Sun, Nov 09, 2008 at 02:24:10PM +0100, Rafael J. Wysocki wrote:
> > > Do you have NO_HZ enabled?
> > > (Cc'ing Thomas)
> > 
> > indeed, I have. Should I try it without NO_HZ?
> 
> Yes, please.

I tried it, it is not better. I/O operations on /dev/sda1 often require a key
hit. It is AHCI driver.

-- 
Lukáš Hejtmánek

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Arjan van de Ven]

On Sun, 9 Nov 2008 21:09:18 +0100
Lukas Hejtmanek <xhejtman@ics.muni.cz> wrote:

> On Sun, Nov 09, 2008 at 02:24:10PM +0100, Rafael J. Wysocki wrote:
> > > > Do you have NO_HZ enabled?
> > > > (Cc'ing Thomas)
> > > 
> > > indeed, I have. Should I try it without NO_HZ?
> > 
> > Yes, please.
> 
> I tried it, it is not better. I/O operations on /dev/sda1 often
> require a key hit. It is AHCI driver.

just as a status on this guy:

1) we know what to remove to make it go away and go back to 2.6.27
status.
However we think it just papers over a bug elsewhere
2) Thomas did a lot of work and has a set of bugfixes to hrtimers and
related that fix a bunch of cases and MIGHT fix this one too (we
haven't been able to reproduce it but there's several reports out for
this "wait until hitting a key")

for me, the plan is that we need to get Thomas' fixes tested by someone
who can reproduce this very reliably. If they fix it, great.
If they don't, time is running out and we need to remove the feature
for 2.6.28 (that is 1 line of change), realizing that this just papers
over stuff and isn't a real fix, and get back to it for 2.6.29.



-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Lukas Hejtmanek]

On Sun, Nov 09, 2008 at 12:28:35PM -0800, Arjan van de Ven wrote:
> for me, the plan is that we need to get Thomas' fixes tested by someone
> who can reproduce this very reliably. If they fix it, great.

as for me, 100% of boots require a key hit to proceed in 2.6.28-rc3 (more
precisely, the current git head).

-- 
Lukáš Hejtmánek

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Linus Torvalds]

On Sun, 9 Nov 2008, Arjan van de Ven wrote:
> 
> for me, the plan is that we need to get Thomas' fixes tested by someone
> who can reproduce this very reliably. If they fix it, great.
> If they don't, time is running out and we need to remove the feature
> for 2.6.28 (that is 1 line of change), realizing that this just papers
> over stuff and isn't a real fix, and get back to it for 2.6.29.

I'd like to see the one-liner fix, even if it turns out to just be a 
workaround that hides the issue and makes us go back to 2.6.27 behaviour. 
I'm about to release -rc4 today, we should be aggressive about 
regressions.

If somebody can test the "real fix" independently, that's obviously fine, 
but it's not an excuse for keeping a pending regression. If people end up 
being 100% sure they found the bug later, we can then re-enable it, but 
again - that has zero bearing on the fact that we should get rid of the 
regression asap.

			Linus

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Arjan van de Ven]

On Sun, 9 Nov 2008 12:39:50 -0800 (PST)
Linus Torvalds <torvalds@linux-foundation.org> wrote:

> 
> 
> On Sun, 9 Nov 2008, Arjan van de Ven wrote:
> > 
> > for me, the plan is that we need to get Thomas' fixes tested by
> > someone who can reproduce this very reliably. If they fix it, great.
> > If they don't, time is running out and we need to remove the feature
> > for 2.6.28 (that is 1 line of change), realizing that this just
> > papers over stuff and isn't a real fix, and get back to it for
> > 2.6.29.
> 
> I'd like to see the one-liner fix, even if it turns out to just be a 
> workaround that hides the issue and makes us go back to 2.6.27
> behaviour. I'm about to release -rc4 today, we should be aggressive
> about regressions.

>From bf1003799b70f68f927d312841a05930856ad716 Mon Sep 17 00:00:00 2001
From: Arjan van de Ven <arjan@linux.intel.com>
Date: Sun, 9 Nov 2008 12:45:10 -0800
Subject: [PATCH] regression: disable timer peek-ahead for 2.6.28

it's showing up as regressions; disabling it very likely just papers
over an underlying issue, but time is running out for 2.6.28,
lets get back to this for 2.6.29

Fixes: #11826 and #11893

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
---
 drivers/cpuidle/cpuidle.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 5bed733..67ec4da 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -65,12 +65,14 @@ static void cpuidle_idle_call(void)
 		return;
 	}
 
+#if 0
+	/* shows regressions, re-enable for 2.6.29 */
 	/*
 	 * run any timers that can be run now, at this point
 	 * before calculating the idle duration etc.
 	 */
 	hrtimer_peek_ahead_timers();
-
+#endif
 	/* ask the governor for the next state */
 	next_state = cpuidle_curr_governor->select(dev);
 	if (need_resched())
-- 
1.6.0.3

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Arjan van de Ven]

On Sun, 9 Nov 2008 21:34:32 +0100
Lukas Hejtmanek <xhejtman@ics.muni.cz> wrote:

> On Sun, Nov 09, 2008 at 12:28:35PM -0800, Arjan van de Ven wrote:
> > for me, the plan is that we need to get Thomas' fixes tested by
> > someone who can reproduce this very reliably. If they fix it, great.
> 
> as for me, 100% of boots require a key hit to proceed in 2.6.28-rc3
> (more precisely, the current git head).
> 

it would be greatly appreciated if those that see this issue can test
the patch below (which is a combo patch of thomas' fixes, to make
testing easier) and confirm if this fixes the hangs.
If they do fix the issue we don't need to disable anything and get better power
savings as bonus as well.


Gautham R Shenoy (1):
      timers: handle HRTIMER_CB_IRQSAFE_UNLOCKED correctly from softirq context

Ingo Molnar (2):
      irq: fix typo
      nohz: fix SMP race

Thomas Gleixner (12):
      nohz: check broadcast on tick restart
      x86: apic reset counter on shutdown
      hrtimer: fix the accounting of hrtimer_peek_ahead()
      hrtimer: do not peek ahead when the hardware timer has fired already
      tick: clear broadcast mask when timer is reprogrammed
      irq: call __irq_enter() before calling the tick_idle_check
      x86: apic honour irq affinity which was set in early boot
      genirq: keep affinities set from userspace across free/request_irq()
      genirq: fix the affinity setting in setup_irq
      tick: cleanup idle checks
      ACPI: processor_idle: check for spurious wakeups
      ACPI: idle check for spurious wakeups accounting fix


 arch/x86/kernel/apic.c        |    1 +
 arch/x86/kernel/io_apic.c     |   26 ++++++++++--
 drivers/acpi/processor_idle.c |   49 ++++++++++++++++++-----
 drivers/cpuidle/cpuidle.c     |    5 ++-
 include/linux/hrtimer.h       |    4 +-
 include/linux/irq.h           |    8 +---
 include/linux/tick.h          |    5 ++
 kernel/hrtimer.c              |   81 +++++++++++++++++++++++++++++--------
 kernel/irq/internals.h        |    2 +
 kernel/irq/manage.c           |   66 ++++++++++++++++++++++++------
 kernel/irq/migration.c        |   11 -----
 kernel/irq/proc.c             |    2 +-
 kernel/softirq.c              |    7 ++-
 kernel/time/tick-broadcast.c  |   27 ++++++++++++
 kernel/time/tick-internal.h   |    5 ++
 kernel/time/tick-sched.c      |   88 ++++++++++++++++++++++------------------
 kernel/time/timer_list.c      |    4 +-
 17 files changed, 279 insertions(+), 112 deletions(-)

diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c
index 04a7f96..70003b8 100644
--- a/arch/x86/kernel/apic.c
+++ b/arch/x86/kernel/apic.c
@@ -441,6 +441,7 @@ static void lapic_timer_setup(enum clock_event_mode mode,
 		v = apic_read(APIC_LVTT);
 		v |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR);
 		apic_write(APIC_LVTT, v);
+		apic_write(APIC_TMICT, 0xffffffff);
 		break;
 	case CLOCK_EVT_MODE_RESUME:
 		/* Nothing to do here */
diff --git a/arch/x86/kernel/io_apic.c b/arch/x86/kernel/io_apic.c
index 7a3f202..988ee89 100644
--- a/arch/x86/kernel/io_apic.c
+++ b/arch/x86/kernel/io_apic.c
@@ -3761,7 +3761,9 @@ int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity)
 void __init setup_ioapic_dest(void)
 {
 	int pin, ioapic, irq, irq_entry;
+	struct irq_desc *desc;
 	struct irq_cfg *cfg;
+	cpumask_t mask;
 
 	if (skip_ioapic_setup == 1)
 		return;
@@ -3778,16 +3780,30 @@ void __init setup_ioapic_dest(void)
 			 * cpu is online.
 			 */
 			cfg = irq_cfg(irq);
-			if (!cfg->vector)
+			if (!cfg->vector) {
 				setup_IO_APIC_irq(ioapic, pin, irq,
 						  irq_trigger(irq_entry),
 						  irq_polarity(irq_entry));
+				continue;
+
+			}
+
+			/*
+			 * Honour affinities which have been set in early boot
+			 */
+			desc = irq_to_desc(irq);
+			if (desc->status &
+			    (IRQ_NO_BALANCING | IRQ_AFFINITY_SET))
+				mask = desc->affinity;
+			else
+				mask = TARGET_CPUS;
+
 #ifdef CONFIG_INTR_REMAP
-			else if (intr_remapping_enabled)
-				set_ir_ioapic_affinity_irq(irq, TARGET_CPUS);
-#endif
+			if (intr_remapping_enabled)
+				set_ir_ioapic_affinity_irq(irq, mask);
 			else
-				set_ioapic_affinity_irq(irq, TARGET_CPUS);
+#endif
+				set_ioapic_affinity_irq(irq, mask);
 		}
 
 	}
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 81b40ed..371dc42 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -41,6 +41,7 @@
 #include <linux/pm_qos_params.h>
 #include <linux/clockchips.h>
 #include <linux/cpuidle.h>
+#include <linux/tick.h>
 
 /*
  * Include the apic definitions for x86 to have the APIC timer related defines
@@ -1458,6 +1459,7 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
 	u32 t1, t2;
 	struct acpi_processor *pr;
 	struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
+	int sleep_ticks = 0;
 
 	pr = __get_cpu_var(processors);
 
@@ -1473,6 +1475,7 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
 		return 0;
 	}
 
+again:
 	if (pr->flags.bm_check)
 		acpi_idle_update_bm_rld(pr, cx);
 
@@ -1480,10 +1483,18 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
 	acpi_idle_do_entry(cx);
 	t2 = inl(acpi_gbl_FADT.xpm_timer_block.address);
 
+	sleep_ticks += ticks_elapsed(t1, t2);
+
 	local_irq_enable();
+
+	/* Check for spurious wakeup */
+	if (check_idle_spurious_wakeup(pr->id) && !need_resched()) {
+		local_irq_disable();
+		goto again;
+	}
 	cx->usage++;
 
-	return ticks_elapsed_in_us(t1, t2);
+	return sleep_ticks;
 }
 
 /**
@@ -1497,7 +1508,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
 	struct acpi_processor *pr;
 	struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
 	u32 t1, t2;
-	int sleep_ticks = 0;
+	int ticks, sleep_ticks = 0;
 
 	pr = __get_cpu_var(processors);
 
@@ -1527,6 +1538,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
 	 */
 	acpi_state_timer_broadcast(pr, cx, 1);
 
+again:
 	if (pr->flags.bm_check)
 		acpi_idle_update_bm_rld(pr, cx);
 
@@ -1544,12 +1556,19 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
 	if (tsc_halts_in_c(cx->type))
 		mark_tsc_unstable("TSC halts in idle");;
 #endif
-	sleep_ticks = ticks_elapsed(t1, t2);
-
+	ticks = ticks_elapsed(t1, t2);
 	/* Tell the scheduler how much we idled: */
-	sched_clock_idle_wakeup_event(sleep_ticks*PM_TIMER_TICK_NS);
+	sched_clock_idle_wakeup_event(ticks*PM_TIMER_TICK_NS);
 
 	local_irq_enable();
+	sleep_ticks += ticks;
+
+	/* Check for spurious wakeup */
+	if (check_idle_spurious_wakeup(pr->id) && !need_resched()) {
+		local_irq_disable();
+		goto again;
+	}
+
 	current_thread_info()->status |= TS_POLLING;
 
 	cx->usage++;
@@ -1575,7 +1594,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
 	struct acpi_processor *pr;
 	struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
 	u32 t1, t2;
-	int sleep_ticks = 0;
+	int ticks, sleep_ticks = 0;
 
 	pr = __get_cpu_var(processors);
 
@@ -1613,14 +1632,16 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
 
 	acpi_unlazy_tlb(smp_processor_id());
 
-	/* Tell the scheduler that we are going deep-idle: */
-	sched_clock_idle_sleep_event();
 	/*
 	 * Must be done before busmaster disable as we might need to
 	 * access HPET !
 	 */
 	acpi_state_timer_broadcast(pr, cx, 1);
 
+again:
+	/* Tell the scheduler that we are going deep-idle: */
+	sched_clock_idle_sleep_event();
+
 	acpi_idle_update_bm_rld(pr, cx);
 
 	/*
@@ -1661,11 +1682,19 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
 	if (tsc_halts_in_c(ACPI_STATE_C3))
 		mark_tsc_unstable("TSC halts in idle");
 #endif
-	sleep_ticks = ticks_elapsed(t1, t2);
+	ticks = ticks_elapsed(t1, t2);
 	/* Tell the scheduler how much we idled: */
-	sched_clock_idle_wakeup_event(sleep_ticks*PM_TIMER_TICK_NS);
+	sched_clock_idle_wakeup_event(ticks*PM_TIMER_TICK_NS);
 
 	local_irq_enable();
+	sleep_ticks += ticks;
+
+	/* Check for spurious wakeup */
+	if (check_idle_spurious_wakeup(pr->id) && !need_resched()) {
+		local_irq_disable();
+		goto again;
+	}
+
 	current_thread_info()->status |= TS_POLLING;
 
 	cx->usage++;
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 5bed733..f3ca665 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -69,7 +69,10 @@ static void cpuidle_idle_call(void)
 	 * run any timers that can be run now, at this point
 	 * before calculating the idle duration etc.
 	 */
-	hrtimer_peek_ahead_timers();
+	if (hrtimer_peek_ahead_timers()) {
+		local_irq_enable();
+		return;
+	}
 
 	/* ask the governor for the next state */
 	next_state = cpuidle_curr_governor->select(dev);
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 07e510a..e3d7d9f 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -294,7 +294,7 @@ static inline int hrtimer_is_hres_active(struct hrtimer *timer)
 	return timer->base->cpu_base->hres_active;
 }
 
-extern void hrtimer_peek_ahead_timers(void);
+extern int hrtimer_peek_ahead_timers(void);
 
 /*
  * The resolution of the clocks. The resolution value is returned in
@@ -318,7 +318,7 @@ extern void hrtimer_peek_ahead_timers(void);
  * is expired in the next softirq when the clock was advanced.
  */
 static inline void clock_was_set(void) { }
-static inline void hrtimer_peek_ahead_timers(void) { }
+static inline int hrtimer_peek_ahead_timers(void) { return 0; }
 
 static inline void hres_timers_resume(void) { }
 
diff --git a/include/linux/irq.h b/include/linux/irq.h
index d058c57..36b186e 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -63,7 +63,8 @@ typedef	void (*irq_flow_handler_t)(unsigned int irq,
 #define IRQ_MOVE_PENDING	0x00200000	/* need to re-target IRQ destination */
 #define IRQ_NO_BALANCING	0x00400000	/* IRQ is excluded from balancing */
 #define IRQ_SPURIOUS_DISABLED	0x00800000	/* IRQ was disabled by the spurious trap */
-#define IRQ_MOVE_PCNTXT	0x01000000	/* IRQ migration from process context */
+#define IRQ_MOVE_PCNTXT		0x01000000	/* IRQ migration from process context */
+#define IRQ_AFFINITY_SET	0x02000000	/* IRQ affinity was set from userspace*/
 
 #ifdef CONFIG_IRQ_PER_CPU
 # define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU)
@@ -210,7 +211,6 @@ extern int setup_irq(unsigned int irq, struct irqaction *new);
 
 #ifdef CONFIG_GENERIC_PENDING_IRQ
 
-void set_pending_irq(unsigned int irq, cpumask_t mask);
 void move_native_irq(int irq);
 void move_masked_irq(int irq);
 
@@ -228,10 +228,6 @@ static inline void move_masked_irq(int irq)
 {
 }
 
-static inline void set_pending_irq(unsigned int irq, cpumask_t mask)
-{
-}
-
 #endif /* CONFIG_GENERIC_PENDING_IRQ */
 
 #else /* CONFIG_SMP */
diff --git a/include/linux/tick.h b/include/linux/tick.h
index b6ec818..ff202ac 100644
--- a/include/linux/tick.h
+++ b/include/linux/tick.h
@@ -64,6 +64,9 @@ struct tick_sched {
 	unsigned long			last_jiffies;
 	unsigned long			next_jiffies;
 	ktime_t				idle_expires;
+	unsigned long			irq_wakeups;
+	unsigned long			irq_last_wakeups;
+	unsigned long			spurious_wakeups;
 };
 
 extern void __init tick_init(void);
@@ -116,6 +119,7 @@ extern void tick_nohz_stop_sched_tick(int inidle);
 extern void tick_nohz_restart_sched_tick(void);
 extern ktime_t tick_nohz_get_sleep_length(void);
 extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time);
+extern int check_idle_spurious_wakeup(int cpu);
 # else
 static inline void tick_nohz_stop_sched_tick(int inidle) { }
 static inline void tick_nohz_restart_sched_tick(void) { }
@@ -126,6 +130,7 @@ static inline ktime_t tick_nohz_get_sleep_length(void)
 	return len;
 }
 static inline u64 get_cpu_idle_time_us(int cpu, u64 *unused) { return -1; }
+static inline int check_idle_spurious_wakeup(int cpu) { return 0; }
 # endif /* !NO_HZ */
 
 #endif
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 2b465df..075bc8e 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -1209,6 +1209,7 @@ static void run_hrtimer_pending(struct hrtimer_cpu_base *cpu_base)
 		enum hrtimer_restart (*fn)(struct hrtimer *);
 		struct hrtimer *timer;
 		int restart;
+		int emulate_hardirq_ctx = 0;
 
 		timer = list_entry(cpu_base->cb_pending.next,
 				   struct hrtimer, cb_entry);
@@ -1217,10 +1218,24 @@ static void run_hrtimer_pending(struct hrtimer_cpu_base *cpu_base)
 		timer_stats_account_hrtimer(timer);
 
 		fn = timer->function;
+		/*
+		 * A timer might have been added to the cb_pending list
+		 * when it was migrated during a cpu-offline operation.
+		 * Emulate hardirq context for such timers.
+		 */
+		if (timer->cb_mode == HRTIMER_CB_IRQSAFE_PERCPU ||
+		    timer->cb_mode == HRTIMER_CB_IRQSAFE_UNLOCKED)
+			emulate_hardirq_ctx = 1;
+
 		__remove_hrtimer(timer, timer->base, HRTIMER_STATE_CALLBACK, 0);
 		spin_unlock_irq(&cpu_base->lock);
 
-		restart = fn(timer);
+		if (unlikely(emulate_hardirq_ctx)) {
+			local_irq_disable();
+			restart = fn(timer);
+			local_irq_enable();
+		} else
+			restart = fn(timer);
 
 		spin_lock_irq(&cpu_base->lock);
 
@@ -1297,23 +1312,26 @@ static void __run_hrtimer(struct hrtimer *timer)
 #ifdef CONFIG_HIGH_RES_TIMERS
 
 /*
- * High resolution timer interrupt
- * Called with interrupts disabled
+ * High resolution timer interrupt internal worker function called
+ * with interrupts disabled either from hrtimer_interrupt() or from
+ * hrtimer_peek_ahead()
  */
-void hrtimer_interrupt(struct clock_event_device *dev)
+int __hrtimer_interrupt(struct hrtimer_cpu_base *cpu_base, int peekahead)
 {
-	struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
 	struct hrtimer_clock_base *base;
 	ktime_t expires_next, now;
 	int i, raise = 0;
 
-	BUG_ON(!cpu_base->hres_active);
-	cpu_base->nr_events++;
-	dev->next_event.tv64 = KTIME_MAX;
-
  retry:
 	now = ktime_get();
 
+	/*
+	 * In peek ahead mode bail out, if the hw interrupt is
+	 * imminent:
+	 */
+	if (peekahead && cpu_base->expires_next.tv64 < now.tv64)
+		return -ETIME;
+
 	expires_next.tv64 = KTIME_MAX;
 
 	base = cpu_base->clock_base;
@@ -1370,17 +1388,49 @@ void hrtimer_interrupt(struct clock_event_device *dev)
 		base++;
 	}
 
+	/*
+	 * We just peeked ahead. The hardware timer did not expire. So
+	 * we can leave the timer armed.
+	 */
+	if (peekahead && cpu_base->expires_next.tv64 == expires_next.tv64)
+		goto out;
+
 	cpu_base->expires_next = expires_next;
 
 	/* Reprogramming necessary ? */
 	if (expires_next.tv64 != KTIME_MAX) {
+		/*
+		 * Clear the peeakahead flag once we decided to
+		 * reprogram. Otherwise we break out in the check
+		 * above.
+		 */
+		peekahead = 0;
 		if (tick_program_event(expires_next, 0))
 			goto retry;
 	}
 
+out:
 	/* Raise softirq ? */
 	if (raise)
 		raise_softirq(HRTIMER_SOFTIRQ);
+
+	return 0;
+}
+
+
+/*
+ * High resolution timer interrupt
+ * Called with interrupts disabled
+ */
+void hrtimer_interrupt(struct clock_event_device *dev)
+{
+	struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
+
+	BUG_ON(!cpu_base->hres_active);
+	cpu_base->nr_events++;
+	dev->next_event.tv64 = KTIME_MAX;
+
+	__hrtimer_interrupt(cpu_base, 0);
 }
 
 /**
@@ -1392,19 +1442,14 @@ void hrtimer_interrupt(struct clock_event_device *dev)
  * they are run immediately and then removed from the timer queue.
  *
  */
-void hrtimer_peek_ahead_timers(void)
+int hrtimer_peek_ahead_timers(void)
 {
-	struct tick_device *td;
-	unsigned long flags;
+	WARN_ON_ONCE(!irqs_disabled());
 
 	if (!hrtimer_hres_active())
-		return;
+		return 0;
 
-	local_irq_save(flags);
-	td = &__get_cpu_var(tick_cpu_device);
-	if (td && td->evtdev)
-		hrtimer_interrupt(td->evtdev);
-	local_irq_restore(flags);
+	return __hrtimer_interrupt(&__get_cpu_var(hrtimer_bases), 1);
 }
 
 static void run_hrtimer_softirq(struct softirq_action *h)
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index c9767e6..64c1c72 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -25,6 +25,8 @@ static inline void unregister_handler_proc(unsigned int irq,
 					   struct irqaction *action) { }
 #endif
 
+extern int irq_select_affinity_usr(unsigned int irq);
+
 /*
  * Debugging printout:
  */
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index c498a1b..4358612 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -82,24 +82,27 @@ int irq_can_set_affinity(unsigned int irq)
 int irq_set_affinity(unsigned int irq, cpumask_t cpumask)
 {
 	struct irq_desc *desc = irq_to_desc(irq);
+	unsigned long flags;
 
 	if (!desc->chip->set_affinity)
 		return -EINVAL;
 
+	spin_lock_irqsave(&desc->lock, flags);
+
 #ifdef CONFIG_GENERIC_PENDING_IRQ
 	if (desc->status & IRQ_MOVE_PCNTXT || desc->status & IRQ_DISABLED) {
-		unsigned long flags;
-
-		spin_lock_irqsave(&desc->lock, flags);
 		desc->affinity = cpumask;
 		desc->chip->set_affinity(irq, cpumask);
-		spin_unlock_irqrestore(&desc->lock, flags);
-	} else
-		set_pending_irq(irq, cpumask);
+	} else {
+		desc->status |= IRQ_MOVE_PENDING;
+		desc->pending_mask = cpumask;
+	}
 #else
 	desc->affinity = cpumask;
 	desc->chip->set_affinity(irq, cpumask);
 #endif
+	desc->status |= IRQ_AFFINITY_SET;
+	spin_unlock_irqrestore(&desc->lock, flags);
 	return 0;
 }
 
@@ -107,24 +110,59 @@ int irq_set_affinity(unsigned int irq, cpumask_t cpumask)
 /*
  * Generic version of the affinity autoselector.
  */
-int irq_select_affinity(unsigned int irq)
+int do_irq_select_affinity(unsigned int irq, struct irq_desc *desc)
 {
 	cpumask_t mask;
-	struct irq_desc *desc;
 
 	if (!irq_can_set_affinity(irq))
 		return 0;
 
 	cpus_and(mask, cpu_online_map, irq_default_affinity);
 
-	desc = irq_to_desc(irq);
+	/*
+	 * Preserve an userspace affinity setup, but make sure that
+	 * one of the targets is online.
+	 */
+	if (desc->status & (IRQ_AFFINITY_SET | IRQ_NO_BALANCING)) {
+		if (cpus_intersects(desc->affinity, cpu_online_map))
+			mask = desc->affinity;
+		else
+			desc->status &= ~IRQ_AFFINITY_SET;
+	}
+
 	desc->affinity = mask;
 	desc->chip->set_affinity(irq, mask);
 
 	return 0;
 }
+#else
+static inline int do_irq_select_affinity(unsigned int irq, struct irq_desc *d)
+{
+	return irq_select_affinity(irq);
+}
 #endif
 
+/*
+ * Called when affinity is set via /proc/irq
+ */
+int irq_select_affinity_usr(unsigned int irq)
+{
+	struct irq_desc *desc = irq_to_desc(irq);
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&desc->lock, flags);
+	ret = do_irq_select_affinity(irq, desc);
+	spin_unlock_irqrestore(&desc->lock, flags);
+
+	return ret;
+}
+
+#else
+static inline int do_irq_select_affinity(int irq, struct irq_desc *desc)
+{
+	return 0;
+}
 #endif
 
 /**
@@ -445,8 +483,12 @@ __setup_irq(unsigned int irq, struct irq_desc * desc, struct irqaction *new)
 			/* Undo nested disables: */
 			desc->depth = 1;
 
+		/* Exclude IRQ from balancing if requested */
+		if (new->flags & IRQF_NOBALANCING)
+			desc->status |= IRQ_NO_BALANCING;
+
 		/* Set default affinity mask once everything is setup */
-		irq_select_affinity(irq);
+		do_irq_select_affinity(irq, desc);
 
 	} else if ((new->flags & IRQF_TRIGGER_MASK)
 			&& (new->flags & IRQF_TRIGGER_MASK)
@@ -459,10 +501,6 @@ __setup_irq(unsigned int irq, struct irq_desc * desc, struct irqaction *new)
 
 	*p = new;
 
-	/* Exclude IRQ from balancing */
-	if (new->flags & IRQF_NOBALANCING)
-		desc->status |= IRQ_NO_BALANCING;
-
 	/* Reset broken irq detection when installing new handler */
 	desc->irq_count = 0;
 	desc->irqs_unhandled = 0;
diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c
index 90b920d..9db681d 100644
--- a/kernel/irq/migration.c
+++ b/kernel/irq/migration.c
@@ -1,17 +1,6 @@
 
 #include <linux/irq.h>
 
-void set_pending_irq(unsigned int irq, cpumask_t mask)
-{
-	struct irq_desc *desc = irq_to_desc(irq);
-	unsigned long flags;
-
-	spin_lock_irqsave(&desc->lock, flags);
-	desc->status |= IRQ_MOVE_PENDING;
-	desc->pending_mask = mask;
-	spin_unlock_irqrestore(&desc->lock, flags);
-}
-
 void move_masked_irq(int irq)
 {
 	struct irq_desc *desc = irq_to_desc(irq);
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 4d161c7..d257e7d 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -62,7 +62,7 @@ static ssize_t irq_affinity_proc_write(struct file *file,
 	if (!cpus_intersects(new_value, cpu_online_map))
 		/* Special case for empty set - allow the architecture
 		   code to set default SMP affinity. */
-		return irq_select_affinity(irq) ? -EINVAL : count;
+		return irq_select_affinity_usr(irq) ? -EINVAL : count;
 
 	irq_set_affinity(irq, new_value);
 
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 7110dae..e7c69a7 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -269,10 +269,11 @@ void irq_enter(void)
 {
 	int cpu = smp_processor_id();
 
-	if (idle_cpu(cpu) && !in_interrupt())
+	if (idle_cpu(cpu) && !in_interrupt()) {
+		__irq_enter();
 		tick_check_idle(cpu);
-
-	__irq_enter();
+	} else
+		__irq_enter();
 }
 
 #ifdef __ARCH_IRQ_EXIT_IRQS_DISABLED
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index f98a1b7..ffb7252 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -397,6 +397,33 @@ void tick_check_oneshot_broadcast(int cpu)
 }
 
 /*
+ * Called from tick_nohz_kick_tick() to check, whether the next
+ * broadcast event is less than a tick_period away or already pending
+ * to avoid reprogramming of the per cpu device.
+ */
+int tick_check_oneshot_broadcast_wakeup(int cpu, ktime_t now)
+{
+	struct clock_event_device *bc;
+	ktime_t delta;
+	int res = 0;
+
+	spin_lock(&tick_broadcast_lock);
+	bc = tick_broadcast_device.evtdev;
+
+	if (bc) {
+		delta =	ktime_sub(bc->next_event, now);
+		if (delta.tv64 <= tick_period.tv64)
+			res = 1;
+		else
+			cpu_clear(cpu, tick_broadcast_oneshot_mask);
+	} else
+		cpu_clear(cpu, tick_broadcast_oneshot_mask);
+
+	spin_unlock(&tick_broadcast_lock);
+	return res;
+}
+
+/*
  * Handle oneshot mode broadcasting
  */
 static void tick_handle_oneshot_broadcast(struct clock_event_device *dev)
diff --git a/kernel/time/tick-internal.h b/kernel/time/tick-internal.h
index b1c05bf..b825c39 100644
--- a/kernel/time/tick-internal.h
+++ b/kernel/time/tick-internal.h
@@ -37,6 +37,7 @@ extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup);
 extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc);
 extern int tick_broadcast_oneshot_active(void);
 extern void tick_check_oneshot_broadcast(int cpu);
+extern int tick_check_oneshot_broadcast_wakeup(int cpu, ktime_t now);
 # else /* BROADCAST */
 static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
 {
@@ -47,6 +48,10 @@ static inline void tick_broadcast_switch_to_oneshot(void) { }
 static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }
 static inline int tick_broadcast_oneshot_active(void) { return 0; }
 static inline void tick_check_oneshot_broadcast(int cpu) { }
+static inline int tick_check_oneshot_broadcast_wakeup(int cpu, ktime_t now)
+{
+	return 0;
+}
 # endif /* !BROADCAST */
 
 #else /* !ONESHOT */
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 5bbb104..35a775e 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -134,48 +134,31 @@ __setup("nohz=", setup_tick_nohz);
  * value. We do this unconditionally on any cpu, as we don't know whether the
  * cpu, which has the update task assigned is in a long sleep.
  */
-void tick_nohz_update_jiffies(void)
+static void tick_nohz_update_jiffies(int cpu, struct tick_sched *ts,
+				     ktime_t now)
 {
-	int cpu = smp_processor_id();
-	struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
-	unsigned long flags;
-	ktime_t now;
-
-	if (!ts->tick_stopped)
-		return;
-
 	cpu_clear(cpu, nohz_cpu_mask);
-	now = ktime_get();
 	ts->idle_waketime = now;
 
-	local_irq_save(flags);
 	tick_do_update_jiffies64(now);
-	local_irq_restore(flags);
 
 	touch_softlockup_watchdog();
 }
 
-static void tick_nohz_stop_idle(int cpu)
+static void tick_nohz_stop_idle(struct tick_sched *ts, ktime_t now)
 {
-	struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
-
-	if (ts->idle_active) {
-		ktime_t now, delta;
-		now = ktime_get();
-		delta = ktime_sub(now, ts->idle_entrytime);
-		ts->idle_lastupdate = now;
-		ts->idle_sleeptime = ktime_add(ts->idle_sleeptime, delta);
-		ts->idle_active = 0;
+	ktime_t delta =	ktime_sub(now, ts->idle_entrytime);
 
-		sched_clock_idle_wakeup_event(0);
-	}
+	ts->idle_lastupdate = now;
+	ts->idle_sleeptime = ktime_add(ts->idle_sleeptime, delta);
+	ts->idle_active = 0;
+	sched_clock_idle_wakeup_event(0);
 }
 
 static ktime_t tick_nohz_start_idle(struct tick_sched *ts)
 {
-	ktime_t now, delta;
+	ktime_t delta,	now = ktime_get();
 
-	now = ktime_get();
 	if (ts->idle_active) {
 		delta = ktime_sub(now, ts->idle_entrytime);
 		ts->idle_lastupdate = now;
@@ -203,6 +186,21 @@ u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time)
 }
 EXPORT_SYMBOL_GPL(get_cpu_idle_time_us);
 
+int check_idle_spurious_wakeup(int cpu)
+{
+	struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
+	int ret;
+
+	local_irq_disable();
+	ret= ts->irq_last_wakeups == ts->irq_wakeups;
+
+	ts->irq_last_wakeups = ts->irq_wakeups;
+	ts->spurious_wakeups += ret;
+	local_irq_enable();
+	return ret;
+}
+EXPORT_SYMBOL_GPL(check_idle_spurious_wakeup);
+
 /**
  * tick_nohz_stop_sched_tick - stop the idle tick from the idle task
  *
@@ -413,10 +411,10 @@ void tick_nohz_restart_sched_tick(void)
 	int cpu = smp_processor_id();
 	struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
 	unsigned long ticks;
-	ktime_t now;
+	ktime_t now = ktime_get();
 
 	local_irq_disable();
-	tick_nohz_stop_idle(cpu);
+	tick_nohz_stop_idle(ts, now);
 
 	if (!ts->inidle || !ts->tick_stopped) {
 		ts->inidle = 0;
@@ -430,7 +428,6 @@ void tick_nohz_restart_sched_tick(void)
 
 	/* Update jiffies first */
 	select_nohz_load_balancer(0);
-	now = ktime_get();
 	tick_do_update_jiffies64(now);
 	cpu_clear(cpu, nohz_cpu_mask);
 
@@ -566,24 +563,20 @@ static void tick_nohz_switch_to_nohz(void)
  * timer and do not touch the other magic bits which need to be done
  * when idle is left.
  */
-static void tick_nohz_kick_tick(int cpu)
+static void tick_nohz_kick_tick(int cpu, struct tick_sched *ts, ktime_t now)
 {
-	struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
-	ktime_t delta, now;
-
-	if (!ts->tick_stopped)
-		return;
+	ktime_t delta;
 
 	/*
 	 * Do not touch the tick device, when the next expiry is either
 	 * already reached or less/equal than the tick period.
 	 */
-	now = ktime_get();
 	delta =	ktime_sub(hrtimer_get_expires(&ts->sched_timer), now);
 	if (delta.tv64 <= tick_period.tv64)
 		return;
 
-	tick_nohz_restart(ts, now);
+	if (!tick_check_oneshot_broadcast_wakeup(cpu, now))
+		tick_nohz_restart(ts, now);
 }
 
 #else
@@ -597,11 +590,26 @@ static inline void tick_nohz_switch_to_nohz(void) { }
  */
 void tick_check_idle(int cpu)
 {
+	struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
+	ktime_t now;
+
+	ts->irq_wakeups++;
+
 	tick_check_oneshot_broadcast(cpu);
+
 #ifdef CONFIG_NO_HZ
-	tick_nohz_stop_idle(cpu);
-	tick_nohz_update_jiffies();
-	tick_nohz_kick_tick(cpu);
+	if (!ts->tick_stopped && !ts->idle_active)
+		return;
+
+	now = ktime_get();
+
+	if (ts->idle_active)
+		tick_nohz_stop_idle(ts, now);
+
+	if (ts->tick_stopped) {
+		tick_nohz_update_jiffies(cpu, ts, now);
+		tick_nohz_kick_tick(cpu, ts, now);
+	}
 #endif
 }
 
diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index a999b92..67c3d60 100644
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -176,6 +176,8 @@ static void print_cpu(struct seq_file *m, int cpu, u64 now)
 		P(last_jiffies);
 		P(next_jiffies);
 		P_ns(idle_expires);
+		P(irq_wakeups);
+		P(spurious_wakeups);
 		SEQ_printf(m, "jiffies: %Lu\n",
 			   (unsigned long long)jiffies);
 	}
@@ -252,7 +254,7 @@ static int timer_list_show(struct seq_file *m, void *v)
 	u64 now = ktime_to_ns(ktime_get());
 	int cpu;
 
-	SEQ_printf(m, "Timer List Version: v0.4\n");
+	SEQ_printf(m, "Timer List Version: v0.5\n");
 	SEQ_printf(m, "HRTIMER_MAX_CLOCK_BASES: %d\n", HRTIMER_MAX_CLOCK_BASES);
 	SEQ_printf(m, "now at %Ld nsecs\n", (unsigned long long)now);
 



-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Lukas Hejtmanek]

On Sun, Nov 09, 2008 at 01:24:38PM -0800, Arjan van de Ven wrote:
> it would be greatly appreciated if those that see this issue can test the
> patch below (which is a combo patch of thomas' fixes, to make testing
> easier) and confirm if this fixes the hangs.  If they do fix the issue we
> don't need to disable anything and get better power savings as bonus as
> well.

well, with this set of patches, my box boots OK without any key hits. I will
keep testing..

-- 
Lukáš Hejtmánek

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Lukas Hejtmanek]

On Sun, Nov 09, 2008 at 01:24:38PM -0800, Arjan van de Ven wrote:
> it would be greatly appreciated if those that see this issue can test the
> patch below (which is a combo patch of thomas' fixes, to make testing
> easier) and confirm if this fixes the hangs.  If they do fix the issue we
> don't need to disable anything and get better power savings as bonus as
> well.

hmm, on the other hand, powertop application shows that C4 state is 51.5%
residency and C0 is 47.3% residency. I have about 5% C0 residency and 95-98%
C3 residency. Is this expected?

-- 
Lukáš Hejtmánek

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Thomas Gleixner]

On Sun, 9 Nov 2008, Arjan van de Ven wrote:
> On Sun, 9 Nov 2008 21:34:32 +0100
> Lukas Hejtmanek <xhejtman@ics.muni.cz> wrote:
> 
> > On Sun, Nov 09, 2008 at 12:28:35PM -0800, Arjan van de Ven wrote:
> > > for me, the plan is that we need to get Thomas' fixes tested by
> > > someone who can reproduce this very reliably. If they fix it, great.
> > 
> > as for me, 100% of boots require a key hit to proceed in 2.6.28-rc3
> > (more precisely, the current git head).
> > 
> 
> it would be greatly appreciated if those that see this issue can test
> the patch below (which is a combo patch of thomas' fixes, to make
> testing easier) and confirm if this fixes the hangs.
> If they do fix the issue we don't need to disable anything and get better power
> savings as bonus as well.

Just disabling the peek_ahead does not make the key press issue go
away. It makes it less prominent.

> 
> Gautham R Shenoy (1):
>       timers: handle HRTIMER_CB_IRQSAFE_UNLOCKED correctly from softirq context
> 
> Ingo Molnar (2):
>       irq: fix typo
>       nohz: fix SMP race
> 
> Thomas Gleixner (12):
>       nohz: check broadcast on tick restart

>       x86: apic reset counter on shutdown

Not a required bugfix, but harmless and avoids extra wakeups.

>       hrtimer: fix the accounting of hrtimer_peek_ahead()
>       hrtimer: do not peek ahead when the hardware timer has fired already
>       tick: clear broadcast mask when timer is reprogrammed
>       irq: call __irq_enter() before calling the tick_idle_check

>       x86: apic honour irq affinity which was set in early boot
>       genirq: keep affinities set from userspace across free/request_irq()
>       genirq: fix the affinity setting in setup_irq

These three are separate. I discoverd the problems via a report from
Kumar Galak and I fixed it while I tried to find out the root cause of
the nohz / keypress issue. They are not part of the timer fixes and in
a separate tree.

>       tick: cleanup idle checks
>       ACPI: processor_idle: check for spurious wakeups
>       ACPI: idle check for spurious wakeups accounting fix

I worked all week after returning from travelling to get down to the
root cause of this. We had several issues:

1) peek_ahead confused the hell out of the nohz code when it expired
timers when the timer interrupt was already pending

2) the changes I did to prevent the stale jiffies in the nohz case
turned out to be incomplete and wrong versus the broadcast of timers
in deeper C-States

3) the consolidation of the nohz idle checks called the nohz jiffies
update code before calling __irq_enter() which caused useless wakeups
of ksoftirqd

4) A long standing - but until now papered over and therefor unnoticed
- problem of spurious wakeups from deep c-states: 

  If one core gets an interrupt the other core(s) wake up as
  well. The stale jiffies fix and the peek_ahead changes made this
  more visible and is a major part of the reported nohz (more wakeups,
  more power consumption) regression.

  This was there forever, but nobody noticed as it was not accounted
  for.

Find below the lineup of the timers-fixes-for-linus branch of the tip
tree (the same as Arjan posted minus the irq fixes)

Thanks,

	tglx

---

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git timers-fixes-for-linus

Gautham R Shenoy (1):
      timers: handle HRTIMER_CB_IRQSAFE_UNLOCKED correctly from softirq context

Ingo Molnar (1):
      nohz: fix SMP race

Thomas Gleixner (9):
      nohz: check broadcast on tick restart
      x86: apic reset counter on shutdown
      hrtimer: fix the accounting of hrtimer_peek_ahead()
      hrtimer: do not peek ahead when the hardware timer has fired already
      tick: clear broadcast mask when timer is reprogrammed
      irq: call __irq_enter() before calling the tick_idle_check
      tick: cleanup idle checks
      ACPI: processor_idle: check for spurious wakeups
      ACPI: idle check for spurious wakeups accounting fix


 arch/x86/kernel/apic.c        |    1 +
 drivers/acpi/processor_idle.c |   49 ++++++++++++++++++-----
 drivers/cpuidle/cpuidle.c     |    5 ++-
 include/linux/hrtimer.h       |    4 +-
 include/linux/tick.h          |    5 ++
 kernel/hrtimer.c              |   81 +++++++++++++++++++++++++++++--------
 kernel/softirq.c              |    7 ++-
 kernel/time/tick-broadcast.c  |   27 ++++++++++++
 kernel/time/tick-internal.h   |    5 ++
 kernel/time/tick-sched.c      |   88 ++++++++++++++++++++++------------------
 kernel/time/timer_list.c      |    4 +-
 11 files changed, 201 insertions(+), 75 deletions(-)

diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c
index 04a7f96..70003b8 100644
--- a/arch/x86/kernel/apic.c
+++ b/arch/x86/kernel/apic.c
@@ -441,6 +441,7 @@ static void lapic_timer_setup(enum clock_event_mode mode,
 		v = apic_read(APIC_LVTT);
 		v |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR);
 		apic_write(APIC_LVTT, v);
+		apic_write(APIC_TMICT, 0xffffffff);
 		break;
 	case CLOCK_EVT_MODE_RESUME:
 		/* Nothing to do here */
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 81b40ed..371dc42 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -41,6 +41,7 @@
 #include <linux/pm_qos_params.h>
 #include <linux/clockchips.h>
 #include <linux/cpuidle.h>
+#include <linux/tick.h>
 
 /*
  * Include the apic definitions for x86 to have the APIC timer related defines
@@ -1458,6 +1459,7 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
 	u32 t1, t2;
 	struct acpi_processor *pr;
 	struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
+	int sleep_ticks = 0;
 
 	pr = __get_cpu_var(processors);
 
@@ -1473,6 +1475,7 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
 		return 0;
 	}
 
+again:
 	if (pr->flags.bm_check)
 		acpi_idle_update_bm_rld(pr, cx);
 
@@ -1480,10 +1483,18 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
 	acpi_idle_do_entry(cx);
 	t2 = inl(acpi_gbl_FADT.xpm_timer_block.address);
 
+	sleep_ticks += ticks_elapsed(t1, t2);
+
 	local_irq_enable();
+
+	/* Check for spurious wakeup */
+	if (check_idle_spurious_wakeup(pr->id) && !need_resched()) {
+		local_irq_disable();
+		goto again;
+	}
 	cx->usage++;
 
-	return ticks_elapsed_in_us(t1, t2);
+	return sleep_ticks;
 }
 
 /**
@@ -1497,7 +1508,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
 	struct acpi_processor *pr;
 	struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
 	u32 t1, t2;
-	int sleep_ticks = 0;
+	int ticks, sleep_ticks = 0;
 
 	pr = __get_cpu_var(processors);
 
@@ -1527,6 +1538,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
 	 */
 	acpi_state_timer_broadcast(pr, cx, 1);
 
+again:
 	if (pr->flags.bm_check)
 		acpi_idle_update_bm_rld(pr, cx);
 
@@ -1544,12 +1556,19 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
 	if (tsc_halts_in_c(cx->type))
 		mark_tsc_unstable("TSC halts in idle");;
 #endif
-	sleep_ticks = ticks_elapsed(t1, t2);
-
+	ticks = ticks_elapsed(t1, t2);
 	/* Tell the scheduler how much we idled: */
-	sched_clock_idle_wakeup_event(sleep_ticks*PM_TIMER_TICK_NS);
+	sched_clock_idle_wakeup_event(ticks*PM_TIMER_TICK_NS);
 
 	local_irq_enable();
+	sleep_ticks += ticks;
+
+	/* Check for spurious wakeup */
+	if (check_idle_spurious_wakeup(pr->id) && !need_resched()) {
+		local_irq_disable();
+		goto again;
+	}
+
 	current_thread_info()->status |= TS_POLLING;
 
 	cx->usage++;
@@ -1575,7 +1594,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
 	struct acpi_processor *pr;
 	struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
 	u32 t1, t2;
-	int sleep_ticks = 0;
+	int ticks, sleep_ticks = 0;
 
 	pr = __get_cpu_var(processors);
 
@@ -1613,14 +1632,16 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
 
 	acpi_unlazy_tlb(smp_processor_id());
 
-	/* Tell the scheduler that we are going deep-idle: */
-	sched_clock_idle_sleep_event();
 	/*
 	 * Must be done before busmaster disable as we might need to
 	 * access HPET !
 	 */
 	acpi_state_timer_broadcast(pr, cx, 1);
 
+again:
+	/* Tell the scheduler that we are going deep-idle: */
+	sched_clock_idle_sleep_event();
+
 	acpi_idle_update_bm_rld(pr, cx);
 
 	/*
@@ -1661,11 +1682,19 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
 	if (tsc_halts_in_c(ACPI_STATE_C3))
 		mark_tsc_unstable("TSC halts in idle");
 #endif
-	sleep_ticks = ticks_elapsed(t1, t2);
+	ticks = ticks_elapsed(t1, t2);
 	/* Tell the scheduler how much we idled: */
-	sched_clock_idle_wakeup_event(sleep_ticks*PM_TIMER_TICK_NS);
+	sched_clock_idle_wakeup_event(ticks*PM_TIMER_TICK_NS);
 
 	local_irq_enable();
+	sleep_ticks += ticks;
+
+	/* Check for spurious wakeup */
+	if (check_idle_spurious_wakeup(pr->id) && !need_resched()) {
+		local_irq_disable();
+		goto again;
+	}
+
 	current_thread_info()->status |= TS_POLLING;
 
 	cx->usage++;
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 5bed733..f3ca665 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -69,7 +69,10 @@ static void cpuidle_idle_call(void)
 	 * run any timers that can be run now, at this point
 	 * before calculating the idle duration etc.
 	 */
-	hrtimer_peek_ahead_timers();
+	if (hrtimer_peek_ahead_timers()) {
+		local_irq_enable();
+		return;
+	}
 
 	/* ask the governor for the next state */
 	next_state = cpuidle_curr_governor->select(dev);
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 07e510a..e3d7d9f 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -294,7 +294,7 @@ static inline int hrtimer_is_hres_active(struct hrtimer *timer)
 	return timer->base->cpu_base->hres_active;
 }
 
-extern void hrtimer_peek_ahead_timers(void);
+extern int hrtimer_peek_ahead_timers(void);
 
 /*
  * The resolution of the clocks. The resolution value is returned in
@@ -318,7 +318,7 @@ extern void hrtimer_peek_ahead_timers(void);
  * is expired in the next softirq when the clock was advanced.
  */
 static inline void clock_was_set(void) { }
-static inline void hrtimer_peek_ahead_timers(void) { }
+static inline int hrtimer_peek_ahead_timers(void) { return 0; }
 
 static inline void hres_timers_resume(void) { }
 
diff --git a/include/linux/tick.h b/include/linux/tick.h
index b6ec818..ff202ac 100644
--- a/include/linux/tick.h
+++ b/include/linux/tick.h
@@ -64,6 +64,9 @@ struct tick_sched {
 	unsigned long			last_jiffies;
 	unsigned long			next_jiffies;
 	ktime_t				idle_expires;
+	unsigned long			irq_wakeups;
+	unsigned long			irq_last_wakeups;
+	unsigned long			spurious_wakeups;
 };
 
 extern void __init tick_init(void);
@@ -116,6 +119,7 @@ extern void tick_nohz_stop_sched_tick(int inidle);
 extern void tick_nohz_restart_sched_tick(void);
 extern ktime_t tick_nohz_get_sleep_length(void);
 extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time);
+extern int check_idle_spurious_wakeup(int cpu);
 # else
 static inline void tick_nohz_stop_sched_tick(int inidle) { }
 static inline void tick_nohz_restart_sched_tick(void) { }
@@ -126,6 +130,7 @@ static inline ktime_t tick_nohz_get_sleep_length(void)
 	return len;
 }
 static inline u64 get_cpu_idle_time_us(int cpu, u64 *unused) { return -1; }
+static inline int check_idle_spurious_wakeup(int cpu) { return 0; }
 # endif /* !NO_HZ */
 
 #endif
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 2b465df..075bc8e 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -1209,6 +1209,7 @@ static void run_hrtimer_pending(struct hrtimer_cpu_base *cpu_base)
 		enum hrtimer_restart (*fn)(struct hrtimer *);
 		struct hrtimer *timer;
 		int restart;
+		int emulate_hardirq_ctx = 0;
 
 		timer = list_entry(cpu_base->cb_pending.next,
 				   struct hrtimer, cb_entry);
@@ -1217,10 +1218,24 @@ static void run_hrtimer_pending(struct hrtimer_cpu_base *cpu_base)
 		timer_stats_account_hrtimer(timer);
 
 		fn = timer->function;
+		/*
+		 * A timer might have been added to the cb_pending list
+		 * when it was migrated during a cpu-offline operation.
+		 * Emulate hardirq context for such timers.
+		 */
+		if (timer->cb_mode == HRTIMER_CB_IRQSAFE_PERCPU ||
+		    timer->cb_mode == HRTIMER_CB_IRQSAFE_UNLOCKED)
+			emulate_hardirq_ctx = 1;
+
 		__remove_hrtimer(timer, timer->base, HRTIMER_STATE_CALLBACK, 0);
 		spin_unlock_irq(&cpu_base->lock);
 
-		restart = fn(timer);
+		if (unlikely(emulate_hardirq_ctx)) {
+			local_irq_disable();
+			restart = fn(timer);
+			local_irq_enable();
+		} else
+			restart = fn(timer);
 
 		spin_lock_irq(&cpu_base->lock);
 
@@ -1297,23 +1312,26 @@ static void __run_hrtimer(struct hrtimer *timer)
 #ifdef CONFIG_HIGH_RES_TIMERS
 
 /*
- * High resolution timer interrupt
- * Called with interrupts disabled
+ * High resolution timer interrupt internal worker function called
+ * with interrupts disabled either from hrtimer_interrupt() or from
+ * hrtimer_peek_ahead()
  */
-void hrtimer_interrupt(struct clock_event_device *dev)
+int __hrtimer_interrupt(struct hrtimer_cpu_base *cpu_base, int peekahead)
 {
-	struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
 	struct hrtimer_clock_base *base;
 	ktime_t expires_next, now;
 	int i, raise = 0;
 
-	BUG_ON(!cpu_base->hres_active);
-	cpu_base->nr_events++;
-	dev->next_event.tv64 = KTIME_MAX;
-
  retry:
 	now = ktime_get();
 
+	/*
+	 * In peek ahead mode bail out, if the hw interrupt is
+	 * imminent:
+	 */
+	if (peekahead && cpu_base->expires_next.tv64 < now.tv64)
+		return -ETIME;
+
 	expires_next.tv64 = KTIME_MAX;
 
 	base = cpu_base->clock_base;
@@ -1370,17 +1388,49 @@ void hrtimer_interrupt(struct clock_event_device *dev)
 		base++;
 	}
 
+	/*
+	 * We just peeked ahead. The hardware timer did not expire. So
+	 * we can leave the timer armed.
+	 */
+	if (peekahead && cpu_base->expires_next.tv64 == expires_next.tv64)
+		goto out;
+
 	cpu_base->expires_next = expires_next;
 
 	/* Reprogramming necessary ? */
 	if (expires_next.tv64 != KTIME_MAX) {
+		/*
+		 * Clear the peeakahead flag once we decided to
+		 * reprogram. Otherwise we break out in the check
+		 * above.
+		 */
+		peekahead = 0;
 		if (tick_program_event(expires_next, 0))
 			goto retry;
 	}
 
+out:
 	/* Raise softirq ? */
 	if (raise)
 		raise_softirq(HRTIMER_SOFTIRQ);
+
+	return 0;
+}
+
+
+/*
+ * High resolution timer interrupt
+ * Called with interrupts disabled
+ */
+void hrtimer_interrupt(struct clock_event_device *dev)
+{
+	struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
+
+	BUG_ON(!cpu_base->hres_active);
+	cpu_base->nr_events++;
+	dev->next_event.tv64 = KTIME_MAX;
+
+	__hrtimer_interrupt(cpu_base, 0);
 }
 
 /**
@@ -1392,19 +1442,14 @@ void hrtimer_interrupt(struct clock_event_device *dev)
  * they are run immediately and then removed from the timer queue.
  *
  */
-void hrtimer_peek_ahead_timers(void)
+int hrtimer_peek_ahead_timers(void)
 {
-	struct tick_device *td;
-	unsigned long flags;
+	WARN_ON_ONCE(!irqs_disabled());
 
 	if (!hrtimer_hres_active())
-		return;
+		return 0;
 
-	local_irq_save(flags);
-	td = &__get_cpu_var(tick_cpu_device);
-	if (td && td->evtdev)
-		hrtimer_interrupt(td->evtdev);
-	local_irq_restore(flags);
+	return __hrtimer_interrupt(&__get_cpu_var(hrtimer_bases), 1);
 }
 
 static void run_hrtimer_softirq(struct softirq_action *h)
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 7110dae..e7c69a7 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -269,10 +269,11 @@ void irq_enter(void)
 {
 	int cpu = smp_processor_id();
 
-	if (idle_cpu(cpu) && !in_interrupt())
+	if (idle_cpu(cpu) && !in_interrupt()) {
+		__irq_enter();
 		tick_check_idle(cpu);
-
-	__irq_enter();
+	} else
+		__irq_enter();
 }
 
 #ifdef __ARCH_IRQ_EXIT_IRQS_DISABLED
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index f98a1b7..ffb7252 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -397,6 +397,33 @@ void tick_check_oneshot_broadcast(int cpu)
 }
 
 /*
+ * Called from tick_nohz_kick_tick() to check, whether the next
+ * broadcast event is less than a tick_period away or already pending
+ * to avoid reprogramming of the per cpu device.
+ */
+int tick_check_oneshot_broadcast_wakeup(int cpu, ktime_t now)
+{
+	struct clock_event_device *bc;
+	ktime_t delta;
+	int res = 0;
+
+	spin_lock(&tick_broadcast_lock);
+	bc = tick_broadcast_device.evtdev;
+
+	if (bc) {
+		delta =	ktime_sub(bc->next_event, now);
+		if (delta.tv64 <= tick_period.tv64)
+			res = 1;
+		else
+			cpu_clear(cpu, tick_broadcast_oneshot_mask);
+	} else
+		cpu_clear(cpu, tick_broadcast_oneshot_mask);
+
+	spin_unlock(&tick_broadcast_lock);
+	return res;
+}
+
+/*
  * Handle oneshot mode broadcasting
  */
 static void tick_handle_oneshot_broadcast(struct clock_event_device *dev)
diff --git a/kernel/time/tick-internal.h b/kernel/time/tick-internal.h
index b1c05bf..b825c39 100644
--- a/kernel/time/tick-internal.h
+++ b/kernel/time/tick-internal.h
@@ -37,6 +37,7 @@ extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup);
 extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc);
 extern int tick_broadcast_oneshot_active(void);
 extern void tick_check_oneshot_broadcast(int cpu);
+extern int tick_check_oneshot_broadcast_wakeup(int cpu, ktime_t now);
 # else /* BROADCAST */
 static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
 {
@@ -47,6 +48,10 @@ static inline void tick_broadcast_switch_to_oneshot(void) { }
 static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }
 static inline int tick_broadcast_oneshot_active(void) { return 0; }
 static inline void tick_check_oneshot_broadcast(int cpu) { }
+static inline int tick_check_oneshot_broadcast_wakeup(int cpu, ktime_t now)
+{
+	return 0;
+}
 # endif /* !BROADCAST */
 
 #else /* !ONESHOT */
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 5bbb104..35a775e 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -134,48 +134,31 @@ __setup("nohz=", setup_tick_nohz);
  * value. We do this unconditionally on any cpu, as we don't know whether the
  * cpu, which has the update task assigned is in a long sleep.
  */
-void tick_nohz_update_jiffies(void)
+static void tick_nohz_update_jiffies(int cpu, struct tick_sched *ts,
+				     ktime_t now)
 {
-	int cpu = smp_processor_id();
-	struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
-	unsigned long flags;
-	ktime_t now;
-
-	if (!ts->tick_stopped)
-		return;
-
 	cpu_clear(cpu, nohz_cpu_mask);
-	now = ktime_get();
 	ts->idle_waketime = now;
 
-	local_irq_save(flags);
 	tick_do_update_jiffies64(now);
-	local_irq_restore(flags);
 
 	touch_softlockup_watchdog();
 }
 
-static void tick_nohz_stop_idle(int cpu)
+static void tick_nohz_stop_idle(struct tick_sched *ts, ktime_t now)
 {
-	struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
-
-	if (ts->idle_active) {
-		ktime_t now, delta;
-		now = ktime_get();
-		delta = ktime_sub(now, ts->idle_entrytime);
-		ts->idle_lastupdate = now;
-		ts->idle_sleeptime = ktime_add(ts->idle_sleeptime, delta);
-		ts->idle_active = 0;
+	ktime_t delta =	ktime_sub(now, ts->idle_entrytime);
 
-		sched_clock_idle_wakeup_event(0);
-	}
+	ts->idle_lastupdate = now;
+	ts->idle_sleeptime = ktime_add(ts->idle_sleeptime, delta);
+	ts->idle_active = 0;
+	sched_clock_idle_wakeup_event(0);
 }
 
 static ktime_t tick_nohz_start_idle(struct tick_sched *ts)
 {
-	ktime_t now, delta;
+	ktime_t delta,	now = ktime_get();
 
-	now = ktime_get();
 	if (ts->idle_active) {
 		delta = ktime_sub(now, ts->idle_entrytime);
 		ts->idle_lastupdate = now;
@@ -203,6 +186,21 @@ u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time)
 }
 EXPORT_SYMBOL_GPL(get_cpu_idle_time_us);
 
+int check_idle_spurious_wakeup(int cpu)
+{
+	struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
+	int ret;
+
+	local_irq_disable();
+	ret= ts->irq_last_wakeups == ts->irq_wakeups;
+
+	ts->irq_last_wakeups = ts->irq_wakeups;
+	ts->spurious_wakeups += ret;
+	local_irq_enable();
+	return ret;
+}
+EXPORT_SYMBOL_GPL(check_idle_spurious_wakeup);
+
 /**
  * tick_nohz_stop_sched_tick - stop the idle tick from the idle task
  *
@@ -413,10 +411,10 @@ void tick_nohz_restart_sched_tick(void)
 	int cpu = smp_processor_id();
 	struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
 	unsigned long ticks;
-	ktime_t now;
+	ktime_t now = ktime_get();
 
 	local_irq_disable();
-	tick_nohz_stop_idle(cpu);
+	tick_nohz_stop_idle(ts, now);
 
 	if (!ts->inidle || !ts->tick_stopped) {
 		ts->inidle = 0;
@@ -430,7 +428,6 @@ void tick_nohz_restart_sched_tick(void)
 
 	/* Update jiffies first */
 	select_nohz_load_balancer(0);
-	now = ktime_get();
 	tick_do_update_jiffies64(now);
 	cpu_clear(cpu, nohz_cpu_mask);
 
@@ -566,24 +563,20 @@ static void tick_nohz_switch_to_nohz(void)
  * timer and do not touch the other magic bits which need to be done
  * when idle is left.
  */
-static void tick_nohz_kick_tick(int cpu)
+static void tick_nohz_kick_tick(int cpu, struct tick_sched *ts, ktime_t now)
 {
-	struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
-	ktime_t delta, now;
-
-	if (!ts->tick_stopped)
-		return;
+	ktime_t delta;
 
 	/*
 	 * Do not touch the tick device, when the next expiry is either
 	 * already reached or less/equal than the tick period.
 	 */
-	now = ktime_get();
 	delta =	ktime_sub(hrtimer_get_expires(&ts->sched_timer), now);
 	if (delta.tv64 <= tick_period.tv64)
 		return;
 
-	tick_nohz_restart(ts, now);
+	if (!tick_check_oneshot_broadcast_wakeup(cpu, now))
+		tick_nohz_restart(ts, now);
 }
 
 #else
@@ -597,11 +590,26 @@ static inline void tick_nohz_switch_to_nohz(void) { }
  */
 void tick_check_idle(int cpu)
 {
+	struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
+	ktime_t now;
+
+	ts->irq_wakeups++;
+
 	tick_check_oneshot_broadcast(cpu);
+
 #ifdef CONFIG_NO_HZ
-	tick_nohz_stop_idle(cpu);
-	tick_nohz_update_jiffies();
-	tick_nohz_kick_tick(cpu);
+	if (!ts->tick_stopped && !ts->idle_active)
+		return;
+
+	now = ktime_get();
+
+	if (ts->idle_active)
+		tick_nohz_stop_idle(ts, now);
+
+	if (ts->tick_stopped) {
+		tick_nohz_update_jiffies(cpu, ts, now);
+		tick_nohz_kick_tick(cpu, ts, now);
+	}
 #endif
 }
 
diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index a999b92..67c3d60 100644
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -176,6 +176,8 @@ static void print_cpu(struct seq_file *m, int cpu, u64 now)
 		P(last_jiffies);
 		P(next_jiffies);
 		P_ns(idle_expires);
+		P(irq_wakeups);
+		P(spurious_wakeups);
 		SEQ_printf(m, "jiffies: %Lu\n",
 			   (unsigned long long)jiffies);
 	}
@@ -252,7 +254,7 @@ static int timer_list_show(struct seq_file *m, void *v)
 	u64 now = ktime_to_ns(ktime_get());
 	int cpu;
 
-	SEQ_printf(m, "Timer List Version: v0.4\n");
+	SEQ_printf(m, "Timer List Version: v0.5\n");
 	SEQ_printf(m, "HRTIMER_MAX_CLOCK_BASES: %d\n", HRTIMER_MAX_CLOCK_BASES);
 	SEQ_printf(m, "now at %Ld nsecs\n", (unsigned long long)now);
 

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Thomas Gleixner]

On Sun, 9 Nov 2008, Lukas Hejtmanek wrote:
> On Sun, Nov 09, 2008 at 01:24:38PM -0800, Arjan van de Ven wrote:
> > it would be greatly appreciated if those that see this issue can test the
> > patch below (which is a combo patch of thomas' fixes, to make testing
> > easier) and confirm if this fixes the hangs.  If they do fix the issue we
> > don't need to disable anything and get better power savings as bonus as
> > well.
> 
> hmm, on the other hand, powertop application shows that C4 state is 51.5%
> residency and C0 is 47.3% residency. I have about 5% C0 residency and 95-98%
> C3 residency. Is this expected?

Hmm. I do not understand. Where from are the second numbers ? 

Can you please provide your .config ?

Thanks,

	tglx

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Bernhard Schmidt]

In gmane.linux.kernel, Thomas Gleixner wrote:

> Find below the lineup of the timers-fixes-for-linus branch of the tip
> tree (the same as Arjan posted minus the irq fixes)

I can confirm that this patch fixes the "need keypress to continue
booting" problem for me that hit me 100% before.

Regards,
Bernhard

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Frans Pop]

On Sunday 09 November 2008, Thomas Gleixner wrote:
> Find below the lineup of the timers-fixes-for-linus branch of the tip
> tree (the same as Arjan posted minus the irq fixes)

I've tested with Thomas' patch set on top of v2.6.28-rc3-261-g8b805ef.

The notebook boots normally, but spends way too much time in C0.

Cheers,
FJP


POWERTOP BEFORE
===============
This is somewhere around -rc3-200 with peek_ahead disabled with a return
in the function. System is on battery after having been suspended to RAM
a few times

Note the double C0 and missing P-states.

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        ( 3.2%)
C0                0.0ms ( 0.0%)
C1                0.0ms ( 0.0%)
C2                0.9ms ( 0.1%)
C4                3.4ms (96.7%)

Wakeups-from-idle per second : 289.1    interval: 10.0s
Power usage (ACPI estimate): 9.8W (4.5 hours)

Top causes for wakeups:
  42.8% (136.5)       <interrupt> : extra timer interrupt
  30.5% ( 97.2)       <interrupt> : PS/2 keyboard/mouse/touchpad
  12.4% ( 39.5)      <kernel IPI> : Rescheduling interrupts
   3.6% ( 11.6)       <interrupt> : iwlagn
   2.5% (  8.0)   <kernel module> : mod_timer (rh_timer_func)
   1.7% (  5.4)             artsd : schedule_hrtimeout_range (hrtimer_wakeup)
   1.1% (  3.6)     <kernel core> : hrtimer_start (tick_sched_timer)
   1.0% (  3.1)       <interrupt> : acpi
   0.6% (  2.0)            kicker : schedule_hrtimeout_range (hrtimer_wakeup)
   0.4% (  1.2)           klipper : schedule_hrtimeout_range (hrtimer_wakeup)
   0.3% (  1.1)          kdesktop : schedule_hrtimeout_range (hrtimer_wakeup)
   0.3% (  1.0)      kwifimanager : schedule_hrtimeout_range (hrtimer_wakeup)
   0.3% (  1.0)     <kernel core> : enqueue_task_rt (sched_rt_period_timer)
   0.3% (  1.0)             artsd : hrtimer_start (it_real_fn)
   0.3% (  1.0)          kwrapper : do_nanosleep (hrtimer_wakeup)
   0.3% (  1.0)              kwin : schedule_hrtimeout_range (hrtimer_wakeup)
   0.3% (  0.9)              Xorg : schedule_hrtimeout_range (hrtimer_wakeup)
   0.2% (  0.5)            iwlagn : mod_timer (ieee80211_sta_timer)
   0.2% (  0.5)         gpg-agent : schedule_hrtimeout_range (hrtimer_wakeup)
   0.2% (  0.5)   hald-addon-stor : schedule_hrtimeout_range (hrtimer_wakeup)


POWERTOP AFTER
==============
Again on battery; P-states are back and the second C0 is now "polling"
(both same as with 2.6.27.4).

System permanently remains very high in C0!
Wakeups go down to ~30 without user input (keyboard/mouse activity), which
is a bit lower than I get with .27.4.

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        (49.7%)         1333 Mhz     0.0%
polling           0.0ms ( 0.0%)         1200 Mhz     0.0%
C1                0.0ms ( 0.0%)         1067 Mhz     0.0%
C2                7.5ms ( 1.9%)          800 Mhz   100.0%
C4                8.5ms (48.4%)

Wakeups-from-idle per second : 59.6     interval: 15.0s
Power usage (ACPI estimate): 9.7W (4.4 hours)

Top causes for wakeups:
  34.6% ( 36.3)       <interrupt> : PS/2 keyboard/mouse/touchpad
  16.0% ( 16.7)      <kernel IPI> : Rescheduling interrupts
   8.9% (  9.3)       <interrupt> : iwlagn
   8.4% (  8.8)       <interrupt> : extra timer interrupt
   7.8% (  8.1)   <kernel module> : mod_timer (rh_timer_func)
   5.6% (  5.9)     <kernel core> : hrtimer_start (tick_sched_timer)
   5.2% (  5.4)             artsd : schedule_hrtimeout_range (hrtimer_wakeup)
   2.9% (  3.0)            kicker : schedule_hrtimeout_range (hrtimer_wakeup)
   1.1% (  1.2)          kdesktop : schedule_hrtimeout_range (hrtimer_wakeup)
   1.0% (  1.1)              Xorg : schedule_hrtimeout_range (hrtimer_wakeup)
   1.0% (  1.0)      kwifimanager : schedule_hrtimeout_range (hrtimer_wakeup)
   1.0% (  1.0)             artsd : hrtimer_start (it_real_fn)
   1.0% (  1.0)          kwrapper : do_nanosleep (hrtimer_wakeup)
   1.0% (  1.0)              kwin : schedule_hrtimeout_range (hrtimer_wakeup)
   1.0% (  1.0)           klipper : schedule_hrtimeout_range (hrtimer_wakeup)
   0.5% (  0.5)   hald-addon-stor : schedule_hrtimeout_range (hrtimer_wakeup)
   0.5% (  0.5)            iwlagn : mod_timer (ieee80211_sta_timer)
   0.5% (  0.5)     <kernel core> : __mod_timer (neigh_periodic_timer)
   0.4% (  0.5)         gpg-agent : schedule_hrtimeout_range (hrtimer_wakeup)
   0.4% (  0.4)           knotify : schedule_hrtimeout_range (hrtimer_wakeup)

In both cases there's no C3, but I think that's because C3 changes to C4
when on battery?

Cheers,
FJP

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Lukas Hejtmanek]

[-- Attachment #1: Type: text/plain, Size: 453 bytes --]

On Sun, Nov 09, 2008 at 10:57:45PM +0100, Thomas Gleixner wrote:
> > hmm, on the other hand, powertop application shows that C4 state is 51.5%
> > residency and C0 is 47.3% residency. I have about 5% C0 residency and 95-98%
> > C3 residency. Is this expected?
> 
> Hmm. I do not understand. Where from are the second numbers ? 

sorry, the second numbers are without your patch.
 
> Can you please provide your .config ?

attached.

-- 
Lukáš Hejtmánek

[-- Attachment #2: .config --]
[-- Type: text/plain, Size: 55907 bytes --]

#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.28-rc3
# Sun Nov  9 20:37:48 2008
#
CONFIG_64BIT=y
# CONFIG_X86_32 is not set
CONFIG_X86_64=y
CONFIG_X86=y
CONFIG_ARCH_DEFCONFIG="arch/x86/configs/x86_64_defconfig"
CONFIG_GENERIC_TIME=y
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_FAST_CMPXCHG_LOCAL=y
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
# CONFIG_RWSEM_XCHGADD_ALGORITHM is not set
CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_ARCH_HAS_CPU_RELAX=y
CONFIG_ARCH_HAS_DEFAULT_IDLE=y
CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
CONFIG_HAVE_CPUMASK_OF_CPU_MAP=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_ZONE_DMA32=y
CONFIG_ARCH_POPULATES_NODE_MAP=y
CONFIG_AUDIT_ARCH=y
CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING=y
CONFIG_GENERIC_HARDIRQS=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_PENDING_IRQ=y
CONFIG_X86_SMP=y
CONFIG_X86_64_SMP=y
CONFIG_X86_HT=y
CONFIG_X86_BIOS_REBOOT=y
CONFIG_X86_TRAMPOLINE=y
# CONFIG_KTIME_SCALAR is not set
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"

#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_LOCK_KERNEL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_LOCALVERSION=""
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
# CONFIG_TASKSTATS is not set
# CONFIG_AUDIT is not set
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=17
# CONFIG_CGROUPS is not set
CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y
# CONFIG_GROUP_SCHED is not set
# CONFIG_SYSFS_DEPRECATED_V2 is not set
CONFIG_RELAY=y
CONFIG_NAMESPACES=y
CONFIG_UTS_NS=y
CONFIG_IPC_NS=y
CONFIG_USER_NS=y
CONFIG_PID_NS=y
# CONFIG_BLK_DEV_INITRD is not set
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_SYSCTL=y
# CONFIG_EMBEDDED is not set
CONFIG_UID16=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
# CONFIG_KALLSYMS_EXTRA_PASS is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_PCSPKR_PLATFORM=y
# CONFIG_COMPAT_BRK is not set
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_ANON_INODES=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_PCI_QUIRKS=y
CONFIG_SLUB_DEBUG=y
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_SLOB is not set
CONFIG_PROFILING=y
CONFIG_TRACEPOINTS=y
# CONFIG_MARKERS is not set
CONFIG_OPROFILE=m
# CONFIG_OPROFILE_IBS is not set
CONFIG_HAVE_OPROFILE=y
# CONFIG_KPROBES is not set
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_USE_GENERIC_SMP_HELPERS=y
# CONFIG_HAVE_GENERIC_DMA_COHERENT is not set
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
CONFIG_MODULE_FORCE_LOAD=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_KMOD=y
CONFIG_STOP_MACHINE=y
CONFIG_BLOCK=y
# CONFIG_BLK_DEV_IO_TRACE is not set
CONFIG_BLK_DEV_BSG=y
CONFIG_BLK_DEV_INTEGRITY=y
CONFIG_BLOCK_COMPAT=y

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_AS=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
# CONFIG_DEFAULT_AS is not set
# CONFIG_DEFAULT_DEADLINE is not set
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"
CONFIG_CLASSIC_RCU=y
CONFIG_FREEZER=y

#
# Processor type and features
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_SMP=y
# CONFIG_X86_MPPARSE is not set
CONFIG_X86_PC=y
# CONFIG_X86_ELAN is not set
# CONFIG_X86_VOYAGER is not set
# CONFIG_X86_GENERICARCH is not set
# CONFIG_X86_VSMP is not set
# CONFIG_PARAVIRT_GUEST is not set
CONFIG_MEMTEST=y
# CONFIG_M386 is not set
# CONFIG_M486 is not set
# CONFIG_M586 is not set
# CONFIG_M586TSC is not set
# CONFIG_M586MMX is not set
# CONFIG_M686 is not set
# CONFIG_MPENTIUMII is not set
# CONFIG_MPENTIUMIII is not set
# CONFIG_MPENTIUMM is not set
# CONFIG_MPENTIUM4 is not set
# CONFIG_MK6 is not set
# CONFIG_MK7 is not set
# CONFIG_MK8 is not set
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
# CONFIG_MCYRIXIII is not set
# CONFIG_MVIAC3_2 is not set
# CONFIG_MVIAC7 is not set
# CONFIG_MPSC is not set
CONFIG_MCORE2=y
# CONFIG_GENERIC_CPU is not set
CONFIG_X86_CPU=y
CONFIG_X86_L1_CACHE_BYTES=64
CONFIG_X86_INTERNODE_CACHE_BYTES=64
CONFIG_X86_CMPXCHG=y
CONFIG_X86_L1_CACHE_SHIFT=6
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INTEL_USERCOPY=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_X86_P6_NOP=y
CONFIG_X86_TSC=y
CONFIG_X86_CMPXCHG64=y
CONFIG_X86_CMOV=y
CONFIG_X86_MINIMUM_CPU_FAMILY=64
CONFIG_X86_DEBUGCTLMSR=y
CONFIG_CPU_SUP_INTEL=y
CONFIG_CPU_SUP_AMD=y
CONFIG_CPU_SUP_CENTAUR_64=y
CONFIG_X86_DS=y
CONFIG_X86_PTRACE_BTS=y
CONFIG_HPET_TIMER=y
CONFIG_HPET_EMULATE_RTC=y
CONFIG_DMI=y
CONFIG_GART_IOMMU=y
# CONFIG_CALGARY_IOMMU is not set
# CONFIG_AMD_IOMMU is not set
CONFIG_SWIOTLB=y
CONFIG_IOMMU_HELPER=y
CONFIG_NR_CPUS=2
# CONFIG_SCHED_SMT is not set
CONFIG_SCHED_MC=y
# CONFIG_PREEMPT_NONE is not set
CONFIG_PREEMPT_VOLUNTARY=y
# CONFIG_PREEMPT is not set
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_MCE=y
CONFIG_X86_MCE_INTEL=y
# CONFIG_X86_MCE_AMD is not set
# CONFIG_I8K is not set
# CONFIG_MICROCODE is not set
# CONFIG_X86_MSR is not set
# CONFIG_X86_CPUID is not set
CONFIG_ARCH_PHYS_ADDR_T_64BIT=y
# CONFIG_NUMA is not set
CONFIG_ARCH_SPARSEMEM_DEFAULT=y
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_SELECT_MEMORY_MODEL=y
# CONFIG_FLATMEM_MANUAL is not set
# CONFIG_DISCONTIGMEM_MANUAL is not set
CONFIG_SPARSEMEM_MANUAL=y
CONFIG_SPARSEMEM=y
CONFIG_HAVE_MEMORY_PRESENT=y
CONFIG_SPARSEMEM_EXTREME=y
CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
CONFIG_SPARSEMEM_VMEMMAP=y

#
# Memory hotplug is currently incompatible with Software Suspend
#
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_RESOURCES_64BIT=y
CONFIG_PHYS_ADDR_T_64BIT=y
CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
CONFIG_UNEVICTABLE_LRU=y
CONFIG_X86_CHECK_BIOS_CORRUPTION=y
# CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK is not set
CONFIG_X86_RESERVE_LOW_64K=y
CONFIG_MTRR=y
CONFIG_MTRR_SANITIZER=y
CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=0
CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
CONFIG_X86_PAT=y
# CONFIG_EFI is not set
CONFIG_SECCOMP=y
# CONFIG_HZ_100 is not set
# CONFIG_HZ_250 is not set
CONFIG_HZ_300=y
# CONFIG_HZ_1000 is not set
CONFIG_HZ=300
CONFIG_SCHED_HRTICK=y
CONFIG_KEXEC=y
CONFIG_CRASH_DUMP=y
CONFIG_PHYSICAL_START=0x200000
CONFIG_RELOCATABLE=y
CONFIG_PHYSICAL_ALIGN=0x200000
CONFIG_HOTPLUG_CPU=y
# CONFIG_COMPAT_VDSO is not set
# CONFIG_CMDLINE_BOOL is not set
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y

#
# Power management and ACPI options
#
CONFIG_ARCH_HIBERNATION_HEADER=y
CONFIG_PM=y
# CONFIG_PM_DEBUG is not set
CONFIG_PM_SLEEP_SMP=y
CONFIG_PM_SLEEP=y
CONFIG_SUSPEND=y
CONFIG_SUSPEND_FREEZER=y
CONFIG_HIBERNATION=y
CONFIG_PM_STD_PARTITION=""
CONFIG_ACPI=y
CONFIG_ACPI_SLEEP=y
CONFIG_ACPI_PROCFS=y
CONFIG_ACPI_PROCFS_POWER=y
CONFIG_ACPI_SYSFS_POWER=y
CONFIG_ACPI_PROC_EVENT=y
CONFIG_ACPI_AC=y
CONFIG_ACPI_BATTERY=y
CONFIG_ACPI_BUTTON=y
CONFIG_ACPI_VIDEO=y
CONFIG_ACPI_FAN=y
CONFIG_ACPI_DOCK=y
CONFIG_ACPI_PROCESSOR=y
CONFIG_ACPI_HOTPLUG_CPU=y
CONFIG_ACPI_THERMAL=y
CONFIG_ACPI_WMI=m
# CONFIG_ACPI_ASUS is not set
# CONFIG_ACPI_TOSHIBA is not set
# CONFIG_ACPI_CUSTOM_DSDT is not set
CONFIG_ACPI_BLACKLIST_YEAR=0
# CONFIG_ACPI_DEBUG is not set
CONFIG_ACPI_EC=y
CONFIG_ACPI_PCI_SLOT=y
CONFIG_ACPI_POWER=y
CONFIG_ACPI_SYSTEM=y
CONFIG_X86_PM_TIMER=y
CONFIG_ACPI_CONTAINER=y
# CONFIG_ACPI_SBS is not set

#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=y
# CONFIG_CPU_FREQ_DEBUG is not set
CONFIG_CPU_FREQ_STAT=y
CONFIG_CPU_FREQ_STAT_DETAILS=y
CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
# CONFIG_CPU_FREQ_GOV_USERSPACE is not set
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
# CONFIG_CPU_FREQ_GOV_CONSERVATIVE is not set

#
# CPUFreq processor drivers
#
CONFIG_X86_ACPI_CPUFREQ=y
# CONFIG_X86_POWERNOW_K8 is not set
# CONFIG_X86_SPEEDSTEP_CENTRINO is not set
# CONFIG_X86_P4_CLOCKMOD is not set

#
# shared options
#
# CONFIG_X86_ACPI_CPUFREQ_PROC_INTF is not set
# CONFIG_X86_SPEEDSTEP_LIB is not set
CONFIG_CPU_IDLE=y
CONFIG_CPU_IDLE_GOV_LADDER=y
CONFIG_CPU_IDLE_GOV_MENU=y

#
# Memory power savings
#
# CONFIG_I7300_IDLE is not set

#
# Bus options (PCI etc.)
#
CONFIG_PCI=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
CONFIG_PCI_DOMAINS=y
# CONFIG_DMAR is not set
CONFIG_INTR_REMAP=y
CONFIG_PCIEPORTBUS=y
CONFIG_PCIEAER=y
CONFIG_PCIEASPM=y
# CONFIG_PCIEASPM_DEBUG is not set
CONFIG_ARCH_SUPPORTS_MSI=y
CONFIG_PCI_MSI=y
# CONFIG_PCI_LEGACY is not set
# CONFIG_PCI_DEBUG is not set
# CONFIG_HT_IRQ is not set
CONFIG_ISA_DMA_API=y
CONFIG_K8_NB=y
CONFIG_PCCARD=m
# CONFIG_PCMCIA_DEBUG is not set
CONFIG_PCMCIA=m
CONFIG_PCMCIA_LOAD_CIS=y
CONFIG_PCMCIA_IOCTL=y
CONFIG_CARDBUS=y

#
# PC-card bridges
#
CONFIG_YENTA=m
CONFIG_YENTA_O2=y
CONFIG_YENTA_RICOH=y
CONFIG_YENTA_TI=y
CONFIG_YENTA_ENE_TUNE=y
CONFIG_YENTA_TOSHIBA=y
# CONFIG_PD6729 is not set
# CONFIG_I82092 is not set
CONFIG_PCCARD_NONSTATIC=m
# CONFIG_HOTPLUG_PCI is not set

#
# Executable file formats / Emulations
#
CONFIG_BINFMT_ELF=y
CONFIG_COMPAT_BINFMT_ELF=y
# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
# CONFIG_HAVE_AOUT is not set
CONFIG_BINFMT_MISC=y
CONFIG_IA32_EMULATION=y
# CONFIG_IA32_AOUT is not set
CONFIG_COMPAT=y
CONFIG_COMPAT_FOR_U64_ALIGNMENT=y
CONFIG_SYSVIPC_COMPAT=y
CONFIG_NET=y

#
# Networking options
#
CONFIG_PACKET=y
CONFIG_PACKET_MMAP=y
CONFIG_UNIX=y
CONFIG_XFRM=y
# CONFIG_XFRM_USER is not set
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
# CONFIG_XFRM_STATISTICS is not set
CONFIG_NET_KEY=y
# CONFIG_NET_KEY_MIGRATE is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
# CONFIG_IP_ADVANCED_ROUTER is not set
CONFIG_IP_FIB_HASH=y
# CONFIG_IP_PNP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE is not set
# CONFIG_IP_MROUTE is not set
# CONFIG_ARPD is not set
CONFIG_SYN_COOKIES=y
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_XFRM_TUNNEL is not set
# CONFIG_INET_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
# CONFIG_INET_XFRM_MODE_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_BEET is not set
# CONFIG_INET_LRO is not set
CONFIG_INET_DIAG=y
CONFIG_INET_TCP_DIAG=y
CONFIG_TCP_CONG_ADVANCED=y
CONFIG_TCP_CONG_BIC=m
CONFIG_TCP_CONG_CUBIC=m
CONFIG_TCP_CONG_WESTWOOD=m
CONFIG_TCP_CONG_HTCP=m
CONFIG_TCP_CONG_HSTCP=y
# CONFIG_TCP_CONG_HYBLA is not set
# CONFIG_TCP_CONG_VEGAS is not set
# CONFIG_TCP_CONG_SCALABLE is not set
# CONFIG_TCP_CONG_LP is not set
# CONFIG_TCP_CONG_VENO is not set
# CONFIG_TCP_CONG_YEAH is not set
# CONFIG_TCP_CONG_ILLINOIS is not set
# CONFIG_DEFAULT_BIC is not set
# CONFIG_DEFAULT_CUBIC is not set
# CONFIG_DEFAULT_HTCP is not set
# CONFIG_DEFAULT_VEGAS is not set
# CONFIG_DEFAULT_WESTWOOD is not set
CONFIG_DEFAULT_RENO=y
CONFIG_DEFAULT_TCP_CONG="reno"
CONFIG_TCP_MD5SIG=y
# CONFIG_IPV6 is not set
CONFIG_NETWORK_SECMARK=y
CONFIG_NETFILTER=y
# CONFIG_NETFILTER_DEBUG is not set
CONFIG_NETFILTER_ADVANCED=y
CONFIG_BRIDGE_NETFILTER=y

#
# Core Netfilter Configuration
#
CONFIG_NETFILTER_NETLINK=m
CONFIG_NETFILTER_NETLINK_QUEUE=m
CONFIG_NETFILTER_NETLINK_LOG=m
CONFIG_NF_CONNTRACK=m
CONFIG_NF_CT_ACCT=y
CONFIG_NF_CONNTRACK_MARK=y
CONFIG_NF_CONNTRACK_SECMARK=y
CONFIG_NF_CONNTRACK_EVENTS=y
# CONFIG_NF_CT_PROTO_DCCP is not set
CONFIG_NF_CT_PROTO_GRE=m
CONFIG_NF_CT_PROTO_SCTP=m
# CONFIG_NF_CT_PROTO_UDPLITE is not set
CONFIG_NF_CONNTRACK_AMANDA=m
CONFIG_NF_CONNTRACK_FTP=m
CONFIG_NF_CONNTRACK_H323=m
CONFIG_NF_CONNTRACK_IRC=m
CONFIG_NF_CONNTRACK_NETBIOS_NS=m
CONFIG_NF_CONNTRACK_PPTP=m
# CONFIG_NF_CONNTRACK_SANE is not set
CONFIG_NF_CONNTRACK_SIP=m
CONFIG_NF_CONNTRACK_TFTP=m
CONFIG_NF_CT_NETLINK=m
# CONFIG_NETFILTER_TPROXY is not set
CONFIG_NETFILTER_XTABLES=m
CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m
CONFIG_NETFILTER_XT_TARGET_CONNMARK=m
CONFIG_NETFILTER_XT_TARGET_CONNSECMARK=m
CONFIG_NETFILTER_XT_TARGET_DSCP=m
CONFIG_NETFILTER_XT_TARGET_MARK=m
CONFIG_NETFILTER_XT_TARGET_NFLOG=m
CONFIG_NETFILTER_XT_TARGET_NFQUEUE=m
CONFIG_NETFILTER_XT_TARGET_NOTRACK=m
# CONFIG_NETFILTER_XT_TARGET_RATEEST is not set
# CONFIG_NETFILTER_XT_TARGET_TRACE is not set
CONFIG_NETFILTER_XT_TARGET_SECMARK=m
CONFIG_NETFILTER_XT_TARGET_TCPMSS=m
# CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP is not set
CONFIG_NETFILTER_XT_MATCH_COMMENT=m
CONFIG_NETFILTER_XT_MATCH_CONNBYTES=m
# CONFIG_NETFILTER_XT_MATCH_CONNLIMIT is not set
CONFIG_NETFILTER_XT_MATCH_CONNMARK=m
CONFIG_NETFILTER_XT_MATCH_CONNTRACK=m
CONFIG_NETFILTER_XT_MATCH_DCCP=m
CONFIG_NETFILTER_XT_MATCH_DSCP=m
CONFIG_NETFILTER_XT_MATCH_ESP=m
CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=m
CONFIG_NETFILTER_XT_MATCH_HELPER=m
# CONFIG_NETFILTER_XT_MATCH_IPRANGE is not set
CONFIG_NETFILTER_XT_MATCH_LENGTH=m
CONFIG_NETFILTER_XT_MATCH_LIMIT=m
CONFIG_NETFILTER_XT_MATCH_MAC=m
CONFIG_NETFILTER_XT_MATCH_MARK=m
CONFIG_NETFILTER_XT_MATCH_MULTIPORT=m
# CONFIG_NETFILTER_XT_MATCH_OWNER is not set
CONFIG_NETFILTER_XT_MATCH_POLICY=m
CONFIG_NETFILTER_XT_MATCH_PHYSDEV=m
CONFIG_NETFILTER_XT_MATCH_PKTTYPE=m
CONFIG_NETFILTER_XT_MATCH_QUOTA=m
# CONFIG_NETFILTER_XT_MATCH_RATEEST is not set
CONFIG_NETFILTER_XT_MATCH_REALM=m
# CONFIG_NETFILTER_XT_MATCH_RECENT is not set
CONFIG_NETFILTER_XT_MATCH_SCTP=m
CONFIG_NETFILTER_XT_MATCH_STATE=m
CONFIG_NETFILTER_XT_MATCH_STATISTIC=m
CONFIG_NETFILTER_XT_MATCH_STRING=m
CONFIG_NETFILTER_XT_MATCH_TCPMSS=m
# CONFIG_NETFILTER_XT_MATCH_TIME is not set
# CONFIG_NETFILTER_XT_MATCH_U32 is not set
# CONFIG_IP_VS is not set

#
# IP: Netfilter Configuration
#
CONFIG_NF_DEFRAG_IPV4=m
CONFIG_NF_CONNTRACK_IPV4=m
CONFIG_NF_CONNTRACK_PROC_COMPAT=y
CONFIG_IP_NF_QUEUE=m
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_MATCH_ADDRTYPE=m
CONFIG_IP_NF_MATCH_AH=m
CONFIG_IP_NF_MATCH_ECN=m
CONFIG_IP_NF_MATCH_TTL=m
CONFIG_IP_NF_FILTER=m
CONFIG_IP_NF_TARGET_REJECT=m
CONFIG_IP_NF_TARGET_LOG=m
CONFIG_IP_NF_TARGET_ULOG=m
CONFIG_NF_NAT=m
CONFIG_NF_NAT_NEEDED=y
CONFIG_IP_NF_TARGET_MASQUERADE=m
CONFIG_IP_NF_TARGET_NETMAP=m
CONFIG_IP_NF_TARGET_REDIRECT=m
CONFIG_NF_NAT_SNMP_BASIC=m
CONFIG_NF_NAT_PROTO_GRE=m
CONFIG_NF_NAT_PROTO_SCTP=m
CONFIG_NF_NAT_FTP=m
CONFIG_NF_NAT_IRC=m
CONFIG_NF_NAT_TFTP=m
CONFIG_NF_NAT_AMANDA=m
CONFIG_NF_NAT_PPTP=m
CONFIG_NF_NAT_H323=m
CONFIG_NF_NAT_SIP=m
CONFIG_IP_NF_MANGLE=m
CONFIG_IP_NF_TARGET_CLUSTERIP=m
CONFIG_IP_NF_TARGET_ECN=m
CONFIG_IP_NF_TARGET_TTL=m
CONFIG_IP_NF_RAW=m
CONFIG_IP_NF_ARPTABLES=m
CONFIG_IP_NF_ARPFILTER=m
CONFIG_IP_NF_ARP_MANGLE=m
# CONFIG_BRIDGE_NF_EBTABLES is not set
# CONFIG_IP_DCCP is not set
# CONFIG_IP_SCTP is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
CONFIG_STP=m
CONFIG_BRIDGE=m
# CONFIG_NET_DSA is not set
CONFIG_VLAN_8021Q=m
# CONFIG_VLAN_8021Q_GVRP is not set
# CONFIG_DECNET is not set
CONFIG_LLC=m
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_NET_SCHED is not set
CONFIG_NET_CLS_ROUTE=y

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_IRDA is not set
CONFIG_BT=m
CONFIG_BT_L2CAP=m
CONFIG_BT_SCO=m
CONFIG_BT_RFCOMM=m
CONFIG_BT_RFCOMM_TTY=y
CONFIG_BT_BNEP=m
CONFIG_BT_BNEP_MC_FILTER=y
CONFIG_BT_BNEP_PROTO_FILTER=y
CONFIG_BT_HIDP=m

#
# Bluetooth device drivers
#
CONFIG_BT_HCIBTUSB=m
CONFIG_BT_HCIBTSDIO=m
CONFIG_BT_HCIUART=m
CONFIG_BT_HCIUART_H4=y
CONFIG_BT_HCIUART_BCSP=y
# CONFIG_BT_HCIUART_LL is not set
# CONFIG_BT_HCIBCM203X is not set
# CONFIG_BT_HCIBPA10X is not set
# CONFIG_BT_HCIBFUSB is not set
# CONFIG_BT_HCIDTL1 is not set
# CONFIG_BT_HCIBT3C is not set
# CONFIG_BT_HCIBLUECARD is not set
# CONFIG_BT_HCIBTUART is not set
# CONFIG_BT_HCIVHCI is not set
# CONFIG_AF_RXRPC is not set
# CONFIG_PHONET is not set
CONFIG_WIRELESS=y
CONFIG_CFG80211=m
CONFIG_NL80211=y
# CONFIG_WIRELESS_OLD_REGULATORY is not set
CONFIG_WIRELESS_EXT=y
CONFIG_WIRELESS_EXT_SYSFS=y
CONFIG_MAC80211=m

#
# Rate control algorithm selection
#
CONFIG_MAC80211_RC_PID=y
CONFIG_MAC80211_RC_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT_PID=y
# CONFIG_MAC80211_RC_DEFAULT_MINSTREL is not set
CONFIG_MAC80211_RC_DEFAULT="pid"
CONFIG_MAC80211_MESH=y
CONFIG_MAC80211_LEDS=y
# CONFIG_MAC80211_DEBUGFS is not set
# CONFIG_MAC80211_DEBUG_MENU is not set
# CONFIG_IEEE80211 is not set
CONFIG_RFKILL=m
CONFIG_RFKILL_INPUT=m
CONFIG_RFKILL_LEDS=y
# CONFIG_NET_9P is not set

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
CONFIG_FIRMWARE_IN_KERNEL=y
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_SYS_HYPERVISOR is not set
CONFIG_CONNECTOR=y
CONFIG_PROC_EVENTS=y
# CONFIG_MTD is not set
# CONFIG_PARPORT is not set
CONFIG_PNP=y
# CONFIG_PNP_DEBUG_MESSAGES is not set

#
# Protocols
#
CONFIG_PNPACPI=y
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_FD is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_BLK_DEV_DAC960 is not set
# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_CRYPTOLOOP=m
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_SX8 is not set
# CONFIG_BLK_DEV_UB is not set
# CONFIG_BLK_DEV_RAM is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
# CONFIG_BLK_DEV_HD is not set
CONFIG_MISC_DEVICES=y
# CONFIG_IBM_ASM is not set
# CONFIG_PHANTOM is not set
# CONFIG_EEPROM_93CX6 is not set
# CONFIG_SGI_IOC4 is not set
# CONFIG_TIFM_CORE is not set
# CONFIG_ACER_WMI is not set
# CONFIG_ASUS_LAPTOP is not set
# CONFIG_FUJITSU_LAPTOP is not set
# CONFIG_HP_WMI is not set
# CONFIG_MSI_LAPTOP is not set
# CONFIG_PANASONIC_LAPTOP is not set
# CONFIG_COMPAL_LAPTOP is not set
# CONFIG_SONY_LAPTOP is not set
CONFIG_THINKPAD_ACPI=m
# CONFIG_THINKPAD_ACPI_DEBUG is not set
CONFIG_THINKPAD_ACPI_BAY=y
# CONFIG_THINKPAD_ACPI_VIDEO is not set
CONFIG_THINKPAD_ACPI_HOTKEY_POLL=y
# CONFIG_INTEL_MENLOW is not set
# CONFIG_EEEPC_LAPTOP is not set
# CONFIG_ENCLOSURE_SERVICES is not set
# CONFIG_SGI_XP is not set
# CONFIG_HP_ILO is not set
# CONFIG_SGI_GRU is not set
CONFIG_HAVE_IDE=y
CONFIG_IDE=y

#
# Please see Documentation/ide/ide.txt for help/info on IDE drives
#
# CONFIG_BLK_DEV_IDE_SATA is not set
CONFIG_IDE_GD=y
CONFIG_IDE_GD_ATA=y
# CONFIG_IDE_GD_ATAPI is not set
CONFIG_BLK_DEV_IDECS=m
CONFIG_BLK_DEV_DELKIN=m
# CONFIG_BLK_DEV_IDECD is not set
# CONFIG_BLK_DEV_IDETAPE is not set
# CONFIG_BLK_DEV_IDESCSI is not set
# CONFIG_BLK_DEV_IDEACPI is not set
# CONFIG_IDE_TASK_IOCTL is not set
CONFIG_IDE_PROC_FS=y

#
# IDE chipset support/bugfixes
#
# CONFIG_IDE_GENERIC is not set
# CONFIG_BLK_DEV_PLATFORM is not set
# CONFIG_BLK_DEV_CMD640 is not set
# CONFIG_BLK_DEV_IDEPNP is not set

#
# PCI IDE chipsets support
#
# CONFIG_BLK_DEV_GENERIC is not set
# CONFIG_BLK_DEV_OPTI621 is not set
# CONFIG_BLK_DEV_RZ1000 is not set
# CONFIG_BLK_DEV_AEC62XX is not set
# CONFIG_BLK_DEV_ALI15X3 is not set
# CONFIG_BLK_DEV_AMD74XX is not set
# CONFIG_BLK_DEV_ATIIXP is not set
# CONFIG_BLK_DEV_CMD64X is not set
# CONFIG_BLK_DEV_TRIFLEX is not set
# CONFIG_BLK_DEV_CS5520 is not set
# CONFIG_BLK_DEV_CS5530 is not set
# CONFIG_BLK_DEV_HPT366 is not set
# CONFIG_BLK_DEV_JMICRON is not set
# CONFIG_BLK_DEV_SC1200 is not set
# CONFIG_BLK_DEV_PIIX is not set
# CONFIG_BLK_DEV_IT8213 is not set
# CONFIG_BLK_DEV_IT821X is not set
# CONFIG_BLK_DEV_NS87415 is not set
# CONFIG_BLK_DEV_PDC202XX_OLD is not set
# CONFIG_BLK_DEV_PDC202XX_NEW is not set
# CONFIG_BLK_DEV_SVWKS is not set
# CONFIG_BLK_DEV_SIIMAGE is not set
# CONFIG_BLK_DEV_SIS5513 is not set
# CONFIG_BLK_DEV_SLC90E66 is not set
# CONFIG_BLK_DEV_TRM290 is not set
# CONFIG_BLK_DEV_VIA82CXXX is not set
# CONFIG_BLK_DEV_TC86C001 is not set
# CONFIG_BLK_DEV_IDEDMA is not set

#
# SCSI device support
#
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
CONFIG_SCSI_TGT=y
# CONFIG_SCSI_NETLINK is not set
CONFIG_SCSI_PROC_FS=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
# CONFIG_CHR_DEV_ST is not set
# CONFIG_CHR_DEV_OSST is not set
CONFIG_BLK_DEV_SR=y
# CONFIG_BLK_DEV_SR_VENDOR is not set
CONFIG_CHR_DEV_SG=y
# CONFIG_CHR_DEV_SCH is not set

#
# Some SCSI devices (e.g. CD jukebox) support multiple LUNs
#
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y
CONFIG_SCSI_WAIT_SCAN=m

#
# SCSI Transports
#
# CONFIG_SCSI_SPI_ATTRS is not set
# CONFIG_SCSI_FC_ATTRS is not set
# CONFIG_SCSI_ISCSI_ATTRS is not set
# CONFIG_SCSI_SAS_ATTRS is not set
# CONFIG_SCSI_SAS_LIBSAS is not set
# CONFIG_SCSI_SRP_ATTRS is not set
# CONFIG_SCSI_LOWLEVEL is not set
# CONFIG_SCSI_LOWLEVEL_PCMCIA is not set
# CONFIG_SCSI_DH is not set
CONFIG_ATA=y
# CONFIG_ATA_NONSTANDARD is not set
CONFIG_ATA_ACPI=y
CONFIG_SATA_PMP=y
CONFIG_SATA_AHCI=y
# CONFIG_SATA_SIL24 is not set
CONFIG_ATA_SFF=y
# CONFIG_SATA_SVW is not set
CONFIG_ATA_PIIX=y
# CONFIG_SATA_MV is not set
# CONFIG_SATA_NV is not set
# CONFIG_PDC_ADMA is not set
# CONFIG_SATA_QSTOR is not set
# CONFIG_SATA_PROMISE is not set
# CONFIG_SATA_SX4 is not set
# CONFIG_SATA_SIL is not set
# CONFIG_SATA_SIS is not set
# CONFIG_SATA_ULI is not set
# CONFIG_SATA_VIA is not set
# CONFIG_SATA_VITESSE is not set
# CONFIG_SATA_INIC162X is not set
# CONFIG_PATA_ACPI is not set
# CONFIG_PATA_ALI is not set
# CONFIG_PATA_AMD is not set
# CONFIG_PATA_ARTOP is not set
# CONFIG_PATA_ATIIXP is not set
# CONFIG_PATA_CMD640_PCI is not set
# CONFIG_PATA_CMD64X is not set
# CONFIG_PATA_CS5520 is not set
# CONFIG_PATA_CS5530 is not set
# CONFIG_PATA_CYPRESS is not set
# CONFIG_PATA_EFAR is not set
# CONFIG_ATA_GENERIC is not set
# CONFIG_PATA_HPT366 is not set
# CONFIG_PATA_HPT37X is not set
# CONFIG_PATA_HPT3X2N is not set
# CONFIG_PATA_HPT3X3 is not set
# CONFIG_PATA_IT821X is not set
# CONFIG_PATA_IT8213 is not set
# CONFIG_PATA_JMICRON is not set
# CONFIG_PATA_TRIFLEX is not set
# CONFIG_PATA_MARVELL is not set
# CONFIG_PATA_MPIIX is not set
# CONFIG_PATA_OLDPIIX is not set
# CONFIG_PATA_NETCELL is not set
# CONFIG_PATA_NINJA32 is not set
# CONFIG_PATA_NS87410 is not set
# CONFIG_PATA_NS87415 is not set
# CONFIG_PATA_OPTI is not set
# CONFIG_PATA_OPTIDMA is not set
# CONFIG_PATA_PCMCIA is not set
# CONFIG_PATA_PDC_OLD is not set
# CONFIG_PATA_RADISYS is not set
# CONFIG_PATA_RZ1000 is not set
# CONFIG_PATA_SC1200 is not set
# CONFIG_PATA_SERVERWORKS is not set
# CONFIG_PATA_PDC2027X is not set
# CONFIG_PATA_SIL680 is not set
# CONFIG_PATA_SIS is not set
# CONFIG_PATA_VIA is not set
# CONFIG_PATA_WINBOND is not set
# CONFIG_PATA_SCH is not set
# CONFIG_MD is not set
# CONFIG_FUSION is not set

#
# IEEE 1394 (FireWire) support
#

#
# Enable only one of the two stacks, unless you know what you are doing
#
# CONFIG_FIREWIRE is not set
CONFIG_IEEE1394=m
CONFIG_IEEE1394_OHCI1394=m
# CONFIG_IEEE1394_PCILYNX is not set
CONFIG_IEEE1394_SBP2=m
# CONFIG_IEEE1394_SBP2_PHYS_DMA is not set
CONFIG_IEEE1394_ETH1394_ROM_ENTRY=y
CONFIG_IEEE1394_ETH1394=m
CONFIG_IEEE1394_RAWIO=m
CONFIG_IEEE1394_VIDEO1394=m
CONFIG_IEEE1394_DV1394=m
# CONFIG_IEEE1394_VERBOSEDEBUG is not set
# CONFIG_I2O is not set
# CONFIG_MACINTOSH_DRIVERS is not set
CONFIG_NETDEVICES=y
# CONFIG_DUMMY is not set
# CONFIG_BONDING is not set
# CONFIG_MACVLAN is not set
# CONFIG_EQUALIZER is not set
CONFIG_TUN=m
# CONFIG_VETH is not set
# CONFIG_NET_SB1000 is not set
# CONFIG_ARCNET is not set
# CONFIG_NET_ETHERNET is not set
CONFIG_MII=m
CONFIG_NETDEV_1000=y
# CONFIG_ACENIC is not set
# CONFIG_DL2K is not set
CONFIG_E1000=m
CONFIG_E1000E=m
# CONFIG_IP1000 is not set
# CONFIG_IGB is not set
# CONFIG_NS83820 is not set
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
# CONFIG_R8169 is not set
# CONFIG_SIS190 is not set
# CONFIG_SKGE is not set
# CONFIG_SKY2 is not set
# CONFIG_VIA_VELOCITY is not set
# CONFIG_TIGON3 is not set
# CONFIG_BNX2 is not set
# CONFIG_QLA3XXX is not set
# CONFIG_ATL1 is not set
# CONFIG_ATL1E is not set
# CONFIG_JME is not set
# CONFIG_NETDEV_10000 is not set
# CONFIG_TR is not set

#
# Wireless LAN
#
# CONFIG_WLAN_PRE80211 is not set
CONFIG_WLAN_80211=y
# CONFIG_PCMCIA_RAYCS is not set
# CONFIG_IPW2100 is not set
# CONFIG_IPW2200 is not set
# CONFIG_LIBERTAS is not set
# CONFIG_LIBERTAS_THINFIRM is not set
# CONFIG_AIRO is not set
# CONFIG_HERMES is not set
# CONFIG_ATMEL is not set
# CONFIG_AIRO_CS is not set
# CONFIG_PCMCIA_WL3501 is not set
# CONFIG_PRISM54 is not set
# CONFIG_USB_ZD1201 is not set
# CONFIG_USB_NET_RNDIS_WLAN is not set
# CONFIG_RTL8180 is not set
# CONFIG_RTL8187 is not set
# CONFIG_ADM8211 is not set
# CONFIG_MAC80211_HWSIM is not set
# CONFIG_P54_COMMON is not set
# CONFIG_ATH5K is not set
# CONFIG_ATH9K is not set
CONFIG_IWLWIFI=m
CONFIG_IWLCORE=m
CONFIG_IWLWIFI_LEDS=y
CONFIG_IWLWIFI_RFKILL=y
CONFIG_IWLWIFI_DEBUG=y
CONFIG_IWLAGN=m
CONFIG_IWLAGN_SPECTRUM_MEASUREMENT=y
CONFIG_IWLAGN_LEDS=y
CONFIG_IWL4965=y
# CONFIG_IWL5000 is not set
# CONFIG_IWL3945 is not set
# CONFIG_HOSTAP is not set
# CONFIG_B43 is not set
# CONFIG_B43LEGACY is not set
# CONFIG_ZD1211RW is not set
# CONFIG_RT2X00 is not set

#
# USB Network Adapters
#
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
CONFIG_USB_USBNET=m
# CONFIG_USB_NET_AX8817X is not set
CONFIG_USB_NET_CDCETHER=m
# CONFIG_USB_NET_DM9601 is not set
# CONFIG_USB_NET_SMSC95XX is not set
# CONFIG_USB_NET_GL620A is not set
# CONFIG_USB_NET_NET1080 is not set
# CONFIG_USB_NET_PLUSB is not set
# CONFIG_USB_NET_MCS7830 is not set
# CONFIG_USB_NET_RNDIS_HOST is not set
# CONFIG_USB_NET_CDC_SUBSET is not set
# CONFIG_USB_NET_ZAURUS is not set
# CONFIG_USB_HSO is not set
# CONFIG_NET_PCMCIA is not set
# CONFIG_WAN is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
CONFIG_PPP=m
CONFIG_PPP_MULTILINK=y
CONFIG_PPP_FILTER=y
CONFIG_PPP_ASYNC=m
CONFIG_PPP_SYNC_TTY=m
CONFIG_PPP_DEFLATE=m
CONFIG_PPP_BSDCOMP=m
CONFIG_PPP_MPPE=m
CONFIG_PPPOE=m
# CONFIG_PPPOL2TP is not set
# CONFIG_SLIP is not set
CONFIG_SLHC=m
# CONFIG_NET_FC is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
# CONFIG_ISDN is not set
# CONFIG_PHONE is not set

#
# Input device support
#
CONFIG_INPUT=y
CONFIG_INPUT_FF_MEMLESS=m
CONFIG_INPUT_POLLDEV=m

#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
# CONFIG_INPUT_JOYDEV is not set
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=y
CONFIG_MOUSE_PS2_ALPS=y
CONFIG_MOUSE_PS2_LOGIPS2PP=y
CONFIG_MOUSE_PS2_SYNAPTICS=y
CONFIG_MOUSE_PS2_LIFEBOOK=y
CONFIG_MOUSE_PS2_TRACKPOINT=y
# CONFIG_MOUSE_PS2_ELANTECH is not set
# CONFIG_MOUSE_PS2_TOUCHKIT is not set
# CONFIG_MOUSE_SERIAL is not set
# CONFIG_MOUSE_APPLETOUCH is not set
# CONFIG_MOUSE_BCM5974 is not set
# CONFIG_MOUSE_VSXXXAA is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
CONFIG_INPUT_MISC=y
CONFIG_INPUT_PCSPKR=m
# CONFIG_INPUT_APANEL is not set
# CONFIG_INPUT_ATLAS_BTNS is not set
# CONFIG_INPUT_ATI_REMOTE is not set
# CONFIG_INPUT_ATI_REMOTE2 is not set
# CONFIG_INPUT_KEYSPAN_REMOTE is not set
# CONFIG_INPUT_POWERMATE is not set
# CONFIG_INPUT_YEALINK is not set
# CONFIG_INPUT_CM109 is not set
CONFIG_INPUT_UINPUT=m

#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=m
# CONFIG_SERIO_CT82C710 is not set
CONFIG_SERIO_PCIPS2=m
CONFIG_SERIO_LIBPS2=y
CONFIG_SERIO_RAW=y
# CONFIG_GAMEPORT is not set

#
# Character devices
#
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
CONFIG_VT_HW_CONSOLE_BINDING=y
CONFIG_DEVKMEM=y
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_NOZOMI is not set

#
# Serial drivers
#
CONFIG_SERIAL_8250=m
CONFIG_FIX_EARLYCON_MEM=y
CONFIG_SERIAL_8250_PCI=m
CONFIG_SERIAL_8250_PNP=m
# CONFIG_SERIAL_8250_CS is not set
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
CONFIG_SERIAL_8250_EXTENDED=y
# CONFIG_SERIAL_8250_MANY_PORTS is not set
CONFIG_SERIAL_8250_SHARE_IRQ=y
# CONFIG_SERIAL_8250_DETECT_IRQ is not set
# CONFIG_SERIAL_8250_RSA is not set

#
# Non-8250 serial port support
#
CONFIG_SERIAL_CORE=m
# CONFIG_SERIAL_JSM is not set
CONFIG_UNIX98_PTYS=y
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=256
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
CONFIG_NVRAM=y
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set

#
# PCMCIA character devices
#
# CONFIG_SYNCLINK_CS is not set
# CONFIG_CARDMAN_4000 is not set
# CONFIG_CARDMAN_4040 is not set
# CONFIG_IPWIRELESS is not set
# CONFIG_MWAVE is not set
# CONFIG_PC8736x_GPIO is not set
# CONFIG_RAW_DRIVER is not set
CONFIG_HPET=y
CONFIG_HPET_MMAP=y
# CONFIG_HANGCHECK_TIMER is not set
# CONFIG_TCG_TPM is not set
# CONFIG_TELCLOCK is not set
CONFIG_DEVPORT=y
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_CHARDEV=y
CONFIG_I2C_HELPER_AUTO=y

#
# I2C Hardware Bus support
#

#
# PC SMBus host controller drivers
#
# CONFIG_I2C_ALI1535 is not set
# CONFIG_I2C_ALI1563 is not set
# CONFIG_I2C_ALI15X3 is not set
# CONFIG_I2C_AMD756 is not set
# CONFIG_I2C_AMD8111 is not set
CONFIG_I2C_I801=y
# CONFIG_I2C_ISCH is not set
# CONFIG_I2C_PIIX4 is not set
# CONFIG_I2C_NFORCE2 is not set
# CONFIG_I2C_SIS5595 is not set
# CONFIG_I2C_SIS630 is not set
# CONFIG_I2C_SIS96X is not set
# CONFIG_I2C_VIA is not set
# CONFIG_I2C_VIAPRO is not set

#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_SIMTEC is not set

#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set

#
# Graphics adapter I2C/DDC channel drivers
#
# CONFIG_I2C_VOODOO3 is not set

#
# Other I2C/SMBus bus drivers
#
# CONFIG_I2C_PCA_PLATFORM is not set
# CONFIG_I2C_STUB is not set

#
# Miscellaneous I2C Chip support
#
# CONFIG_DS1682 is not set
CONFIG_AT24=m
CONFIG_SENSORS_EEPROM=m
# CONFIG_SENSORS_PCF8574 is not set
# CONFIG_PCF8575 is not set
# CONFIG_SENSORS_PCA9539 is not set
# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_SENSORS_MAX6875 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_I2C_DEBUG_CHIP is not set
# CONFIG_SPI is not set
CONFIG_ARCH_WANT_OPTIONAL_GPIOLIB=y
# CONFIG_GPIOLIB is not set
# CONFIG_W1 is not set
CONFIG_POWER_SUPPLY=y
# CONFIG_POWER_SUPPLY_DEBUG is not set
# CONFIG_PDA_POWER is not set
# CONFIG_BATTERY_DS2760 is not set
# CONFIG_BATTERY_BQ27x00 is not set
CONFIG_HWMON=y
# CONFIG_HWMON_VID is not set
# CONFIG_SENSORS_ABITUGURU is not set
# CONFIG_SENSORS_ABITUGURU3 is not set
# CONFIG_SENSORS_AD7414 is not set
# CONFIG_SENSORS_AD7418 is not set
# CONFIG_SENSORS_ADM1021 is not set
# CONFIG_SENSORS_ADM1025 is not set
# CONFIG_SENSORS_ADM1026 is not set
# CONFIG_SENSORS_ADM1029 is not set
# CONFIG_SENSORS_ADM1031 is not set
# CONFIG_SENSORS_ADM9240 is not set
# CONFIG_SENSORS_ADT7470 is not set
# CONFIG_SENSORS_ADT7473 is not set
# CONFIG_SENSORS_K8TEMP is not set
# CONFIG_SENSORS_ASB100 is not set
# CONFIG_SENSORS_ATXP1 is not set
# CONFIG_SENSORS_DS1621 is not set
# CONFIG_SENSORS_I5K_AMB is not set
# CONFIG_SENSORS_F71805F is not set
# CONFIG_SENSORS_F71882FG is not set
# CONFIG_SENSORS_F75375S is not set
# CONFIG_SENSORS_FSCHER is not set
# CONFIG_SENSORS_FSCPOS is not set
# CONFIG_SENSORS_FSCHMD is not set
# CONFIG_SENSORS_GL518SM is not set
# CONFIG_SENSORS_GL520SM is not set
CONFIG_SENSORS_CORETEMP=m
# CONFIG_SENSORS_IT87 is not set
# CONFIG_SENSORS_LM63 is not set
# CONFIG_SENSORS_LM75 is not set
# CONFIG_SENSORS_LM77 is not set
# CONFIG_SENSORS_LM78 is not set
# CONFIG_SENSORS_LM80 is not set
# CONFIG_SENSORS_LM83 is not set
# CONFIG_SENSORS_LM85 is not set
# CONFIG_SENSORS_LM87 is not set
# CONFIG_SENSORS_LM90 is not set
# CONFIG_SENSORS_LM92 is not set
# CONFIG_SENSORS_LM93 is not set
# CONFIG_SENSORS_MAX1619 is not set
# CONFIG_SENSORS_MAX6650 is not set
# CONFIG_SENSORS_PC87360 is not set
# CONFIG_SENSORS_PC87427 is not set
# CONFIG_SENSORS_SIS5595 is not set
# CONFIG_SENSORS_DME1737 is not set
# CONFIG_SENSORS_SMSC47M1 is not set
# CONFIG_SENSORS_SMSC47M192 is not set
# CONFIG_SENSORS_SMSC47B397 is not set
# CONFIG_SENSORS_ADS7828 is not set
# CONFIG_SENSORS_THMC50 is not set
# CONFIG_SENSORS_VIA686A is not set
# CONFIG_SENSORS_VT1211 is not set
# CONFIG_SENSORS_VT8231 is not set
# CONFIG_SENSORS_W83781D is not set
# CONFIG_SENSORS_W83791D is not set
# CONFIG_SENSORS_W83792D is not set
# CONFIG_SENSORS_W83793 is not set
# CONFIG_SENSORS_W83L785TS is not set
# CONFIG_SENSORS_W83L786NG is not set
# CONFIG_SENSORS_W83627HF is not set
# CONFIG_SENSORS_W83627EHF is not set
CONFIG_SENSORS_HDAPS=m
# CONFIG_SENSORS_APPLESMC is not set
# CONFIG_HWMON_DEBUG_CHIP is not set
CONFIG_THERMAL=y
CONFIG_THERMAL_HWMON=y
# CONFIG_WATCHDOG is not set

#
# Sonics Silicon Backplane
#
CONFIG_SSB_POSSIBLE=y
# CONFIG_SSB is not set

#
# Multifunction device drivers
#
# CONFIG_MFD_CORE is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_MFD_TMIO is not set
# CONFIG_PMIC_DA903X is not set
# CONFIG_MFD_WM8400 is not set
# CONFIG_MFD_WM8350_I2C is not set

#
# Voltage and Current regulators
#
CONFIG_REGULATOR=y
# CONFIG_REGULATOR_DEBUG is not set
# CONFIG_REGULATOR_FIXED_VOLTAGE is not set
# CONFIG_REGULATOR_VIRTUAL_CONSUMER is not set
# CONFIG_REGULATOR_BQ24022 is not set

#
# Multimedia devices
#

#
# Multimedia core support
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
# CONFIG_VIDEO_MEDIA is not set

#
# Multimedia drivers
#
# CONFIG_DAB is not set

#
# Graphics support
#
CONFIG_AGP=y
CONFIG_AGP_AMD64=y
CONFIG_AGP_INTEL=m
# CONFIG_AGP_SIS is not set
# CONFIG_AGP_VIA is not set
CONFIG_DRM=m
# CONFIG_DRM_TDFX is not set
# CONFIG_DRM_R128 is not set
# CONFIG_DRM_RADEON is not set
# CONFIG_DRM_I810 is not set
# CONFIG_DRM_I830 is not set
CONFIG_DRM_I915=m
# CONFIG_DRM_MGA is not set
# CONFIG_DRM_SIS is not set
# CONFIG_DRM_VIA is not set
# CONFIG_DRM_SAVAGE is not set
# CONFIG_VGASTATE is not set
CONFIG_VIDEO_OUTPUT_CONTROL=y
# CONFIG_FB is not set
CONFIG_BACKLIGHT_LCD_SUPPORT=y
# CONFIG_LCD_CLASS_DEVICE is not set
CONFIG_BACKLIGHT_CLASS_DEVICE=y
# CONFIG_BACKLIGHT_CORGI is not set
# CONFIG_BACKLIGHT_PROGEAR is not set
# CONFIG_BACKLIGHT_MBP_NVIDIA is not set
# CONFIG_BACKLIGHT_SAHARA is not set

#
# Display device support
#
# CONFIG_DISPLAY_SUPPORT is not set

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
# CONFIG_VGACON_SOFT_SCROLLBACK is not set
CONFIG_DUMMY_CONSOLE=y
CONFIG_SOUND=y
CONFIG_SOUND_OSS_CORE=y
CONFIG_SND=y
CONFIG_SND_TIMER=y
CONFIG_SND_PCM=y
CONFIG_SND_SEQUENCER=y
CONFIG_SND_SEQ_DUMMY=y
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=y
CONFIG_SND_PCM_OSS=y
CONFIG_SND_PCM_OSS_PLUGINS=y
CONFIG_SND_SEQUENCER_OSS=y
CONFIG_SND_DYNAMIC_MINORS=y
CONFIG_SND_SUPPORT_OLD_API=y
CONFIG_SND_VERBOSE_PROCFS=y
# CONFIG_SND_VERBOSE_PRINTK is not set
# CONFIG_SND_DEBUG is not set
CONFIG_SND_VMASTER=y
CONFIG_SND_DRIVERS=y
# CONFIG_SND_PCSP is not set
# CONFIG_SND_DUMMY is not set
# CONFIG_SND_VIRMIDI is not set
# CONFIG_SND_MTPAV is not set
# CONFIG_SND_SERIAL_U16550 is not set
# CONFIG_SND_MPU401 is not set
CONFIG_SND_PCI=y
# CONFIG_SND_AD1889 is not set
# CONFIG_SND_ALS300 is not set
# CONFIG_SND_ALS4000 is not set
# CONFIG_SND_ALI5451 is not set
# CONFIG_SND_ATIIXP is not set
# CONFIG_SND_ATIIXP_MODEM is not set
# CONFIG_SND_AU8810 is not set
# CONFIG_SND_AU8820 is not set
# CONFIG_SND_AU8830 is not set
# CONFIG_SND_AW2 is not set
# CONFIG_SND_AZT3328 is not set
# CONFIG_SND_BT87X is not set
# CONFIG_SND_CA0106 is not set
# CONFIG_SND_CMIPCI is not set
# CONFIG_SND_OXYGEN is not set
# CONFIG_SND_CS4281 is not set
# CONFIG_SND_CS46XX is not set
# CONFIG_SND_CS5530 is not set
# CONFIG_SND_DARLA20 is not set
# CONFIG_SND_GINA20 is not set
# CONFIG_SND_LAYLA20 is not set
# CONFIG_SND_DARLA24 is not set
# CONFIG_SND_GINA24 is not set
# CONFIG_SND_LAYLA24 is not set
# CONFIG_SND_MONA is not set
# CONFIG_SND_MIA is not set
# CONFIG_SND_ECHO3G is not set
# CONFIG_SND_INDIGO is not set
# CONFIG_SND_INDIGOIO is not set
# CONFIG_SND_INDIGODJ is not set
# CONFIG_SND_EMU10K1 is not set
# CONFIG_SND_EMU10K1X is not set
# CONFIG_SND_ENS1370 is not set
# CONFIG_SND_ENS1371 is not set
# CONFIG_SND_ES1938 is not set
# CONFIG_SND_ES1968 is not set
# CONFIG_SND_FM801 is not set
CONFIG_SND_HDA_INTEL=m
# CONFIG_SND_HDA_HWDEP is not set
# CONFIG_SND_HDA_INPUT_BEEP is not set
# CONFIG_SND_HDA_CODEC_REALTEK is not set
CONFIG_SND_HDA_CODEC_ANALOG=y
# CONFIG_SND_HDA_CODEC_SIGMATEL is not set
# CONFIG_SND_HDA_CODEC_VIA is not set
# CONFIG_SND_HDA_CODEC_ATIHDMI is not set
# CONFIG_SND_HDA_CODEC_NVHDMI is not set
# CONFIG_SND_HDA_CODEC_CONEXANT is not set
# CONFIG_SND_HDA_CODEC_CMEDIA is not set
# CONFIG_SND_HDA_CODEC_SI3054 is not set
CONFIG_SND_HDA_GENERIC=y
CONFIG_SND_HDA_POWER_SAVE=y
CONFIG_SND_HDA_POWER_SAVE_DEFAULT=10
# CONFIG_SND_HDSP is not set
# CONFIG_SND_HDSPM is not set
# CONFIG_SND_HIFIER is not set
# CONFIG_SND_ICE1712 is not set
# CONFIG_SND_ICE1724 is not set
# CONFIG_SND_INTEL8X0 is not set
# CONFIG_SND_INTEL8X0M is not set
# CONFIG_SND_KORG1212 is not set
# CONFIG_SND_MAESTRO3 is not set
# CONFIG_SND_MIXART is not set
# CONFIG_SND_NM256 is not set
# CONFIG_SND_PCXHR is not set
# CONFIG_SND_RIPTIDE is not set
# CONFIG_SND_RME32 is not set
# CONFIG_SND_RME96 is not set
# CONFIG_SND_RME9652 is not set
# CONFIG_SND_SONICVIBES is not set
# CONFIG_SND_TRIDENT is not set
# CONFIG_SND_VIA82XX is not set
# CONFIG_SND_VIA82XX_MODEM is not set
# CONFIG_SND_VIRTUOSO is not set
# CONFIG_SND_VX222 is not set
# CONFIG_SND_YMFPCI is not set
# CONFIG_SND_USB is not set
# CONFIG_SND_PCMCIA is not set
# CONFIG_SND_SOC is not set
# CONFIG_SOUND_PRIME is not set
CONFIG_HID_SUPPORT=y
CONFIG_HID=y
# CONFIG_HID_DEBUG is not set
# CONFIG_HIDRAW is not set

#
# USB Input Devices
#
CONFIG_USB_HID=m
# CONFIG_HID_PID is not set
CONFIG_USB_HIDDEV=y

#
# USB HID Boot Protocol drivers
#
# CONFIG_USB_KBD is not set
# CONFIG_USB_MOUSE is not set

#
# Special HID drivers
#
# CONFIG_HID_COMPAT is not set
CONFIG_HID_A4TECH=m
CONFIG_HID_APPLE=m
CONFIG_HID_BELKIN=m
CONFIG_HID_BRIGHT=m
CONFIG_HID_CHERRY=m
CONFIG_HID_CHICONY=m
CONFIG_HID_CYPRESS=m
CONFIG_HID_DELL=m
CONFIG_HID_EZKEY=m
CONFIG_HID_GYRATION=m
CONFIG_HID_LOGITECH=m
# CONFIG_LOGITECH_FF is not set
# CONFIG_LOGIRUMBLEPAD2_FF is not set
CONFIG_HID_MICROSOFT=m
CONFIG_HID_MONTEREY=m
CONFIG_HID_PANTHERLORD=m
# CONFIG_PANTHERLORD_FF is not set
CONFIG_HID_PETALYNX=m
CONFIG_HID_SAMSUNG=m
CONFIG_HID_SONY=m
CONFIG_HID_SUNPLUS=m
# CONFIG_THRUSTMASTER_FF is not set
# CONFIG_ZEROPLUS_FF is not set
CONFIG_USB_SUPPORT=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=y
CONFIG_USB_DEBUG=y
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y

#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
CONFIG_USB_DEVICE_CLASS=y
# CONFIG_USB_DYNAMIC_MINORS is not set
CONFIG_USB_SUSPEND=y
# CONFIG_USB_OTG is not set
CONFIG_USB_MON=y
# CONFIG_USB_WUSB is not set
# CONFIG_USB_WUSB_CBAF is not set

#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
CONFIG_USB_EHCI_HCD=m
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_ISP1760_HCD is not set
# CONFIG_USB_OHCI_HCD is not set
CONFIG_USB_UHCI_HCD=m
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_WHCI_HCD is not set
# CONFIG_USB_HWA_HCD is not set

#
# USB Device Class drivers
#
CONFIG_USB_ACM=m
CONFIG_USB_PRINTER=m
# CONFIG_USB_WDM is not set
# CONFIG_USB_TMC is not set

#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
#

#
# may also be needed; see USB_STORAGE Help for more information
#
CONFIG_USB_STORAGE=m
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_DPCM is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_ONETOUCH is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_STORAGE_CYPRESS_ATACB is not set
CONFIG_USB_LIBUSUAL=y

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set

#
# USB port drivers
#
CONFIG_USB_SERIAL=y
# CONFIG_USB_SERIAL_CONSOLE is not set
# CONFIG_USB_EZUSB is not set
# CONFIG_USB_SERIAL_GENERIC is not set
# CONFIG_USB_SERIAL_AIRCABLE is not set
# CONFIG_USB_SERIAL_ARK3116 is not set
# CONFIG_USB_SERIAL_BELKIN is not set
# CONFIG_USB_SERIAL_CH341 is not set
# CONFIG_USB_SERIAL_WHITEHEAT is not set
# CONFIG_USB_SERIAL_DIGI_ACCELEPORT is not set
# CONFIG_USB_SERIAL_CP2101 is not set
# CONFIG_USB_SERIAL_CYPRESS_M8 is not set
# CONFIG_USB_SERIAL_EMPEG is not set
# CONFIG_USB_SERIAL_FTDI_SIO is not set
# CONFIG_USB_SERIAL_FUNSOFT is not set
# CONFIG_USB_SERIAL_VISOR is not set
# CONFIG_USB_SERIAL_IPAQ is not set
# CONFIG_USB_SERIAL_IR is not set
# CONFIG_USB_SERIAL_EDGEPORT is not set
# CONFIG_USB_SERIAL_EDGEPORT_TI is not set
# CONFIG_USB_SERIAL_GARMIN is not set
# CONFIG_USB_SERIAL_IPW is not set
# CONFIG_USB_SERIAL_IUU is not set
# CONFIG_USB_SERIAL_KEYSPAN_PDA is not set
# CONFIG_USB_SERIAL_KEYSPAN is not set
# CONFIG_USB_SERIAL_KLSI is not set
# CONFIG_USB_SERIAL_KOBIL_SCT is not set
# CONFIG_USB_SERIAL_MCT_U232 is not set
# CONFIG_USB_SERIAL_MOS7720 is not set
# CONFIG_USB_SERIAL_MOS7840 is not set
# CONFIG_USB_SERIAL_MOTOROLA is not set
# CONFIG_USB_SERIAL_NAVMAN is not set
CONFIG_USB_SERIAL_PL2303=y
# CONFIG_USB_SERIAL_OTI6858 is not set
# CONFIG_USB_SERIAL_SPCP8X5 is not set
# CONFIG_USB_SERIAL_HP4X is not set
# CONFIG_USB_SERIAL_SAFE is not set
# CONFIG_USB_SERIAL_SIERRAWIRELESS is not set
# CONFIG_USB_SERIAL_TI is not set
# CONFIG_USB_SERIAL_CYBERJACK is not set
# CONFIG_USB_SERIAL_XIRCOM is not set
# CONFIG_USB_SERIAL_OPTION is not set
# CONFIG_USB_SERIAL_OMNINET is not set
# CONFIG_USB_SERIAL_DEBUG is not set

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_SEVSEG is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_BERRY_CHARGE is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_PHIDGET is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
# CONFIG_USB_ISIGHTFW is not set
# CONFIG_USB_VST is not set
# CONFIG_USB_GADGET is not set
# CONFIG_UWB is not set
CONFIG_MMC=y
# CONFIG_MMC_DEBUG is not set
# CONFIG_MMC_UNSAFE_RESUME is not set

#
# MMC/SD/SDIO Card Drivers
#
CONFIG_MMC_BLOCK=y
CONFIG_MMC_BLOCK_BOUNCE=y
CONFIG_SDIO_UART=y
# CONFIG_MMC_TEST is not set

#
# MMC/SD/SDIO Host Controller Drivers
#
CONFIG_MMC_SDHCI=m
CONFIG_MMC_SDHCI_PCI=m
# CONFIG_MMC_RICOH_MMC is not set
# CONFIG_MMC_WBSD is not set
# CONFIG_MMC_TIFM_SD is not set
CONFIG_MMC_SDRICOH_CS=m
# CONFIG_MEMSTICK is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y

#
# LED drivers
#
# CONFIG_LEDS_PCA9532 is not set
# CONFIG_LEDS_HP_DISK is not set
# CONFIG_LEDS_CLEVO_MAIL is not set
# CONFIG_LEDS_PCA955X is not set

#
# LED Triggers
#
CONFIG_LEDS_TRIGGERS=y
CONFIG_LEDS_TRIGGER_TIMER=m
# CONFIG_LEDS_TRIGGER_IDE_DISK is not set
CONFIG_LEDS_TRIGGER_HEARTBEAT=m
CONFIG_LEDS_TRIGGER_BACKLIGHT=m
CONFIG_LEDS_TRIGGER_DEFAULT_ON=m
# CONFIG_ACCESSIBILITY is not set
# CONFIG_INFINIBAND is not set
# CONFIG_EDAC is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
# CONFIG_RTC_DEBUG is not set

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
CONFIG_RTC_INTF_DEV_UIE_EMUL=y
CONFIG_RTC_DRV_TEST=m

#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_DS1307 is not set
# CONFIG_RTC_DRV_DS1374 is not set
# CONFIG_RTC_DRV_DS1672 is not set
# CONFIG_RTC_DRV_MAX6900 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
# CONFIG_RTC_DRV_ISL1208 is not set
# CONFIG_RTC_DRV_X1205 is not set
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
# CONFIG_RTC_DRV_S35390A is not set
# CONFIG_RTC_DRV_FM3130 is not set

#
# SPI RTC drivers
#

#
# Platform RTC drivers
#
CONFIG_RTC_DRV_CMOS=y
# CONFIG_RTC_DRV_DS1286 is not set
# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T35 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_BQ4802 is not set
# CONFIG_RTC_DRV_V3020 is not set

#
# on-CPU RTC drivers
#
# CONFIG_DMADEVICES is not set
# CONFIG_UIO is not set
CONFIG_STAGING=y
CONFIG_STAGING_EXCLUDE_BUILD=y

#
# Firmware Drivers
#
# CONFIG_EDD is not set
CONFIG_FIRMWARE_MEMMAP=y
# CONFIG_DELL_RBU is not set
# CONFIG_DCDBAS is not set
CONFIG_DMIID=y
# CONFIG_ISCSI_IBFT_FIND is not set

#
# File systems
#
CONFIG_EXT2_FS=y
CONFIG_EXT2_FS_XATTR=y
CONFIG_EXT2_FS_POSIX_ACL=y
CONFIG_EXT2_FS_SECURITY=y
# CONFIG_EXT2_FS_XIP is not set
CONFIG_EXT3_FS=y
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_POSIX_ACL=y
CONFIG_EXT3_FS_SECURITY=y
# CONFIG_EXT4_FS is not set
CONFIG_JBD=y
# CONFIG_JBD_DEBUG is not set
CONFIG_FS_MBCACHE=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
CONFIG_FS_POSIX_ACL=y
CONFIG_FILE_LOCKING=y
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_OCFS2_FS is not set
CONFIG_DNOTIFY=y
CONFIG_INOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_QUOTA is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
CONFIG_FUSE_FS=m

#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_UDF_FS=m
CONFIG_UDF_NLS=y

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=m
# CONFIG_MSDOS_FS is not set
CONFIG_VFAT_FS=m
CONFIG_FAT_DEFAULT_CODEPAGE=850
CONFIG_FAT_DEFAULT_IOCHARSET="utf8"
CONFIG_NTFS_FS=m
# CONFIG_NTFS_DEBUG is not set
# CONFIG_NTFS_RW is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_VMCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
# CONFIG_HUGETLBFS is not set
# CONFIG_HUGETLB_PAGE is not set
CONFIG_CONFIGFS_FS=m

#
# Miscellaneous filesystems
#
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_ECRYPT_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_CRAMFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=m
CONFIG_NFS_V3=y
CONFIG_NFS_V3_ACL=y
CONFIG_NFS_V4=y
# CONFIG_NFSD is not set
CONFIG_LOCKD=m
CONFIG_LOCKD_V4=y
CONFIG_NFS_ACL_SUPPORT=m
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=m
CONFIG_SUNRPC_GSS=m
CONFIG_SUNRPC_REGISTER_V4=y
CONFIG_RPCSEC_GSS_KRB5=m
# CONFIG_RPCSEC_GSS_SPKM3 is not set
# CONFIG_SMB_FS is not set
CONFIG_CIFS=m
# CONFIG_CIFS_STATS is not set
# CONFIG_CIFS_WEAK_PW_HASH is not set
CONFIG_CIFS_UPCALL=y
# CONFIG_CIFS_XATTR is not set
# CONFIG_CIFS_DEBUG2 is not set
# CONFIG_CIFS_EXPERIMENTAL is not set
# CONFIG_NCP_FS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set

#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="utf8"
CONFIG_NLS_CODEPAGE_437=m
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
CONFIG_NLS_CODEPAGE_850=m
CONFIG_NLS_CODEPAGE_852=m
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
CONFIG_NLS_CODEPAGE_1250=m
CONFIG_NLS_CODEPAGE_1251=m
CONFIG_NLS_ASCII=m
CONFIG_NLS_ISO8859_1=m
CONFIG_NLS_ISO8859_2=m
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=m
# CONFIG_DLM is not set

#
# Kernel hacking
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_PRINTK_TIME=y
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_FRAME_WARN=2048
CONFIG_MAGIC_SYSRQ=y
# CONFIG_UNUSED_SYMBOLS is not set
CONFIG_DEBUG_FS=y
# CONFIG_HEADERS_CHECK is not set
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_SHIRQ is not set
# CONFIG_DETECT_SOFTLOCKUP is not set
# CONFIG_SCHED_DEBUG is not set
# CONFIG_SCHEDSTATS is not set
CONFIG_TIMER_STATS=y
# CONFIG_DEBUG_OBJECTS is not set
# CONFIG_SLUB_DEBUG_ON is not set
# CONFIG_SLUB_STATS is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_RT_MUTEX_TESTER is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_PROVE_LOCKING is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
CONFIG_STACKTRACE=y
# CONFIG_DEBUG_KOBJECT is not set
CONFIG_DEBUG_BUGVERBOSE=y
# CONFIG_DEBUG_INFO is not set
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_VIRTUAL is not set
# CONFIG_DEBUG_WRITECOUNT is not set
CONFIG_DEBUG_MEMORY_INIT=y
# CONFIG_DEBUG_LIST is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_FRAME_POINTER is not set
# CONFIG_BOOT_PRINTK_DELAY is not set
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_RCU_CPU_STALL_DETECTOR is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_LATENCYTOP is not set
CONFIG_SYSCTL_SYSCALL_CHECK=y
CONFIG_NOP_TRACER=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_RING_BUFFER=y
CONFIG_TRACING=y

#
# Tracers
#
# CONFIG_FUNCTION_TRACER is not set
# CONFIG_IRQSOFF_TRACER is not set
CONFIG_SYSPROF_TRACER=y
# CONFIG_SCHED_TRACER is not set
# CONFIG_CONTEXT_SWITCH_TRACER is not set
# CONFIG_BOOT_TRACER is not set
# CONFIG_STACK_TRACER is not set
# CONFIG_FTRACE_STARTUP_TEST is not set
# CONFIG_PROVIDE_OHCI1394_DMA_INIT is not set
# CONFIG_DYNAMIC_PRINTK_DEBUG is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
# CONFIG_STRICT_DEVMEM is not set
# CONFIG_X86_VERBOSE_BOOTUP is not set
CONFIG_EARLY_PRINTK=y
# CONFIG_EARLY_PRINTK_DBGP is not set
# CONFIG_DEBUG_STACKOVERFLOW is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_DEBUG_PAGEALLOC is not set
# CONFIG_DEBUG_PER_CPU_MAPS is not set
# CONFIG_X86_PTDUMP is not set
# CONFIG_DEBUG_RODATA is not set
# CONFIG_DIRECT_GBPAGES is not set
# CONFIG_DEBUG_NX_TEST is not set
# CONFIG_IOMMU_DEBUG is not set
# CONFIG_MMIOTRACE is not set
CONFIG_IO_DELAY_TYPE_0X80=0
CONFIG_IO_DELAY_TYPE_0XED=1
CONFIG_IO_DELAY_TYPE_UDELAY=2
CONFIG_IO_DELAY_TYPE_NONE=3
# CONFIG_IO_DELAY_0X80 is not set
# CONFIG_IO_DELAY_0XED is not set
# CONFIG_IO_DELAY_UDELAY is not set
CONFIG_IO_DELAY_NONE=y
CONFIG_DEFAULT_IO_DELAY_TYPE=3
# CONFIG_DEBUG_BOOT_PARAMS is not set
# CONFIG_CPA_DEBUG is not set
CONFIG_OPTIMIZE_INLINING=y

#
# Security options
#
CONFIG_KEYS=y
# CONFIG_KEYS_DEBUG_PROC_KEYS is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITYFS is not set
# CONFIG_SECURITY_FILE_CAPABILITIES is not set
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
CONFIG_CRYPTO_FIPS=y
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_AEAD=y
CONFIG_CRYPTO_BLKCIPHER=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_RNG=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_GF128MUL=m
CONFIG_CRYPTO_NULL=m
CONFIG_CRYPTO_CRYPTD=m
# CONFIG_CRYPTO_AUTHENC is not set
CONFIG_CRYPTO_TEST=m

#
# Authenticated Encryption with Associated Data
#
# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_GCM is not set
# CONFIG_CRYPTO_SEQIV is not set

#
# Block modes
#
CONFIG_CRYPTO_CBC=m
# CONFIG_CRYPTO_CTR is not set
CONFIG_CRYPTO_CTS=m
CONFIG_CRYPTO_ECB=m
CONFIG_CRYPTO_LRW=m
CONFIG_CRYPTO_PCBC=m
# CONFIG_CRYPTO_XTS is not set

#
# Hash modes
#
CONFIG_CRYPTO_HMAC=y
CONFIG_CRYPTO_XCBC=m

#
# Digest
#
CONFIG_CRYPTO_CRC32C=m
CONFIG_CRYPTO_CRC32C_INTEL=m
CONFIG_CRYPTO_MD4=m
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_MICHAEL_MIC=m
CONFIG_CRYPTO_RMD128=m
CONFIG_CRYPTO_RMD160=m
CONFIG_CRYPTO_RMD256=m
CONFIG_CRYPTO_RMD320=m
CONFIG_CRYPTO_SHA1=m
CONFIG_CRYPTO_SHA256=m
CONFIG_CRYPTO_SHA512=m
CONFIG_CRYPTO_TGR192=m
CONFIG_CRYPTO_WP512=m

#
# Ciphers
#
CONFIG_CRYPTO_AES=m
CONFIG_CRYPTO_AES_X86_64=m
CONFIG_CRYPTO_ANUBIS=m
CONFIG_CRYPTO_ARC4=m
CONFIG_CRYPTO_BLOWFISH=m
CONFIG_CRYPTO_CAMELLIA=m
CONFIG_CRYPTO_CAST5=m
CONFIG_CRYPTO_CAST6=m
CONFIG_CRYPTO_DES=m
CONFIG_CRYPTO_FCRYPT=m
CONFIG_CRYPTO_KHAZAD=m
# CONFIG_CRYPTO_SALSA20 is not set
# CONFIG_CRYPTO_SALSA20_X86_64 is not set
# CONFIG_CRYPTO_SEED is not set
CONFIG_CRYPTO_SERPENT=m
CONFIG_CRYPTO_TEA=m
CONFIG_CRYPTO_TWOFISH=m
CONFIG_CRYPTO_TWOFISH_COMMON=m
CONFIG_CRYPTO_TWOFISH_X86_64=m

#
# Compression
#
CONFIG_CRYPTO_DEFLATE=m
# CONFIG_CRYPTO_LZO is not set

#
# Random Number Generation
#
CONFIG_CRYPTO_ANSI_CPRNG=m
CONFIG_CRYPTO_HW=y
# CONFIG_CRYPTO_DEV_HIFN_795X is not set
CONFIG_HAVE_KVM=y
# CONFIG_VIRTUALIZATION is not set

#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_GENERIC_FIND_FIRST_BIT=y
CONFIG_GENERIC_FIND_NEXT_BIT=y
CONFIG_CRC_CCITT=m
CONFIG_CRC16=m
CONFIG_CRC_T10DIF=y
CONFIG_CRC_ITU_T=m
CONFIG_CRC32=y
# CONFIG_CRC7 is not set
CONFIG_LIBCRC32C=m
CONFIG_ZLIB_INFLATE=m
CONFIG_ZLIB_DEFLATE=m
CONFIG_TEXTSEARCH=y
CONFIG_TEXTSEARCH_KMP=m
CONFIG_TEXTSEARCH_BM=m
CONFIG_TEXTSEARCH_FSM=m
CONFIG_PLIST=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Lukas Hejtmanek]

On Sun, Nov 09, 2008 at 10:57:45PM +0100, Thomas Gleixner wrote:
> > > it would be greatly appreciated if those that see this issue can test the
> > > patch below (which is a combo patch of thomas' fixes, to make testing
> > > easier) and confirm if this fixes the hangs.  If they do fix the issue we
> > > don't need to disable anything and get better power savings as bonus as
> > > well.

another observation, it sometimes happens that a key press causes a repeat too
fast.

-- 
Lukáš Hejtmánek

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Yves-Alexis Perez]

[-- Attachment #1: Type: text/plain, Size: 1900 bytes --]

On dim, 2008-11-09 at 13:24 -0800, Arjan van de Ven wrote:
> On Sun, 9 Nov 2008 21:34:32 +0100
> Lukas Hejtmanek <xhejtman@ics.muni.cz> wrote:
> 
> > On Sun, Nov 09, 2008 at 12:28:35PM -0800, Arjan van de Ven wrote:
> > > for me, the plan is that we need to get Thomas' fixes tested by
> > > someone who can reproduce this very reliably. If they fix it, great.
> > 
> > as for me, 100% of boots require a key hit to proceed in 2.6.28-rc3
> > (more precisely, the current git head).
> > 
> 
> it would be greatly appreciated if those that see this issue can test
> the patch below (which is a combo patch of thomas' fixes, to make
> testing easier) and confirm if this fixes the hangs.
> If they do fix the issue we don't need to disable anything and get better power
> savings as bonus as well.

Under 2.6.28-rc4 the bootime seems ok, but I have way too much powertop
wakups:

corsac@hidalgo: sudo powertop -d
PowerTOP 1.10    (C) 2007, 2008 Intel Corporation 

Collecting data for 15 seconds 


Cn                Avg residency
C0 (cpu running)        ( 4,3%)
C0                0,0ms ( 0,0%)
C1                0,0ms ( 0,0%)
C2                0,5ms ( 0,3%)
C4                2,8ms (95,5%)
P-states (frequencies)
  2,21 Ghz     1,3%
  2,21 Ghz     0,0%
  1,60 Ghz     0,5%
   800 Mhz    98,1%
Wakeups-from-idle per second : 346,5	interval: 15,0s
Power usage (ACPI estimate): 15,1W (1,6 hours) 
Top causes for wakeups:
  74,1% (278,5)       <interrupt> : extra timer interrupt 
   8,8% ( 33,2)      <kernel IPI> : Rescheduling interrupts 
   4,1% ( 15,3)       <interrupt> : uhci_hcd:usb5, yenta,
i915@pci:0000:00:02.0 
   3,6% ( 13,7)       <interrupt> : iwlagn 
   1,7% (  6,5)       <interrupt> : acpi 
   1,1% (  4,1)   <kernel module> : usb_hcd_poll_rh_status
(rh_timer_func) 
   1,0% (  3,9)       <interrupt> : ahci 

Cheers,
-- 
Yves-Alexis

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 197 bytes --]

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Len Brown]

> Under 2.6.28-rc4 the bootime seems ok, but I have way too much powertop
> wakups:

I see the same on a T61.
There was a boot-stall in -rc3, now gone in rc4. 
(as of today's top of tree: 3ad4f597058301c97f362e500a32f63f5c950a45)

However, I'm seeing over 800 "extra timer interrupt" per second when idle

-Len

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Frans Pop]

Hi Thomas/Arjan,

On Sunday 09 November 2008, Thomas Gleixner wrote:
> I worked all week after returning from travelling to get down to the
> root cause of this. We had several issues:
>
> 1) peek_ahead confused the hell out of the nohz code when it expired
> timers when the timer interrupt was already pending
>
> 2) the changes I did to prevent the stale jiffies in the nohz case
> turned out to be incomplete and wrong versus the broadcast of timers
> in deeper C-States
>
> 3) the consolidation of the nohz idle checks called the nohz jiffies
> update code before calling __irq_enter() which caused useless wakeups
> of ksoftirqd
>
> 4) A long standing - but until now papered over and therefor unnoticed
> - problem of spurious wakeups from deep c-states:
>
>   If one core gets an interrupt the other core(s) wake up as
>   well. The stale jiffies fix and the peek_ahead changes made this
>   more visible and is a major part of the reported nohz (more wakeups,
>   more power consumption) regression.
>
>   This was there forever, but nobody noticed as it was not accounted
>   for.
>
> Find below the lineup of the timers-fixes-for-linus branch of the tip
> tree (the same as Arjan posted minus the irq fixes)

Could either of you maybe give a status update on this patch set and the 
remaining issues with it that were reported (especially the high C0 
reported by powertop)?

TIA,
FJP

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Frans Pop]

[-- Attachment #1: Type: text/plain, Size: 1876 bytes --]

On Friday 14 November 2008, Frans Pop wrote:
> > Find below the lineup of the timers-fixes-for-linus branch of the tip
> > tree (the same as Arjan posted minus the irq fixes)
>
> Could either of you maybe give a status update on this patch set and
> the remaining issues with it that were reported (especially the high C0
> reported by powertop)?

I guess part of the answer is:
commit ae99286b4f1be7788f2d6947c66a91dbd6351eec
Author: Thomas Gleixner <tglx@linutronix.de>
Date:   Mon Nov 10 13:20:23 2008 +0100
    nohz: disable tick_nohz_kick_tick() for now

I've just done some testing using v2.6.28-rc4-322-g58e20d8 which includes 
this patch.

CPU usage reported by powertop is now normal again (close to 100% in 
lowest C state), but I'm still getting high counts for:
- <kernel IPI> : Rescheduling interrupts
  Typically 3-5 on .26/.27; 15-17 on .28.
- <interrupt>  : extra timer interrupt
  Consistently more prominent for .28 (though not with high values)
  than for .27, but way better than for .26.

The attachment shows top wakeups between .26.3, .27.4 and .28-rc4-322 for 
comparison. There are no significant differences between running on mains 
or on battery, but it does show some powertop weirdness.

powertop questions
------------------
- What's with this change from "polling" to "C0" for the 2nd C state?
  After boot I always (both when booted on mains and on battery) get
  "polling", but after inserting or removing mains it will continue to
  show "C0" independent of any further power state changes.
- After switching to battery the first time I get something like:
  C1                0.0ms (614891469122.
  This is reproducible. I guess a rounding error due to the change in
  the number of C states. Later updates clear this.
- Looks like someone could not make up his mind between comma and slash
  here: "(long term: 26.2W,/1.6h)"

Cheers,
FJP


[-- Attachment #2: powertop.txt --]
[-- Type: text/plain, Size: 6115 bytes --]

*** 2.6.26.3 on on mains ***
     PowerTOP version 1.10      (C) 2007 Intel Corporation

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        ( 0.4%)         1333 Mhz     0.0%
polling           0.0ms ( 0.0%)         1200 Mhz     0.0%
C1                0.0ms ( 0.0%)         1067 Mhz     0.0%
C3               14.0ms (99.6%)          800 Mhz   100.0%


Wakeups-from-idle per second : 71.5     interval: 15.0s
no ACPI power usage estimate available

Top causes for wakeups:
  33.1% ( 23.7)       <interrupt> : iwl4965
  19.6% ( 14.1)       <interrupt> : extra timer interrupt
  11.4% (  8.1)   <kernel module> : usb_hcd_poll_rh_status (rh_timer_func)
   9.0% (  6.5)             artsd : schedule_timeout (process_timeout)
   7.1% (  5.1)      <kernel IPI> : Rescheduling interrupts
===================================================================
*** 2.6.27.4 on battery ***
     PowerTOP version 1.10      (C) 2007 Intel Corporation

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        ( 0.7%)         1333 Mhz     0.0%
polling           0.0ms ( 0.0%)         1200 Mhz     0.0%
C1                0.0ms ( 0.0%)         1067 Mhz     0.0%
C2                0.8ms ( 0.0%)          800 Mhz   100.0%
C4               20.1ms (99.3%)

Wakeups-from-idle per second : 49.8     interval: 15.0s
Power usage (ACPI estimate): 8.5W (4.9 hours)

Top causes for wakeups:
  21.6% (  9.3)       <interrupt> : iwlagn
  19.0% (  8.1)   <kernel module> : mod_timer (rh_timer_func)
  13.2% (  5.7)             artsd : __mod_timer (process_timeout)
  10.4% (  4.5)      <kernel IPI> : Rescheduling interrupts
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*** 2.6.27.4 on mains ***
     PowerTOP version 1.10      (C) 2007 Intel Corporation

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        ( 0.3%)         1333 Mhz     0.0%
C0                0.0ms ( 0.0%)         1200 Mhz     0.0%
C1                0.0ms ( 0.0%)         1067 Mhz     0.0%
C3               19.2ms (99.7%)          800 Mhz   100.0%


Wakeups-from-idle per second : 52.0     interval: 15.0s
no ACPI power usage estimate available

Top causes for wakeups:
  20.3% (  8.2)       <interrupt> : iwlagn
  19.8% (  8.0)   <kernel module> : mod_timer (rh_timer_func)
  13.9% (  5.6)             artsd : __mod_timer (process_timeout)
   9.3% (  3.7)      <kernel IPI> : Rescheduling interrupts
===================================================================
*** 2.6.28-rc4 on mains ***
     PowerTOP version 1.10      (C) 2007 Intel Corporation

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        ( 0.4%)         1333 Mhz     0.0%
polling           0.0ms ( 0.0%)         1200 Mhz     0.0%
C1                0.0ms ( 0.0%)         1067 Mhz     0.0%
C3               16.7ms (99.6%)          800 Mhz   100.0%


Wakeups-from-idle per second : 59.7     interval: 15.0s
no ACPI power usage estimate available

Top causes for wakeups:
  21.5% ( 15.6)      <kernel IPI> : Rescheduling interrupts
  13.5% (  9.8)       <interrupt> : iwlagn
  13.5% (  9.8)     <kernel core> : hrtimer_start (tick_sched_timer)
  11.0% (  8.0)   <kernel module> : mod_timer (rh_timer_func)
   9.8% (  7.1)       <interrupt> : extra timer interrupt
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*** 2.6.28-rc4 just after switch to battery ***
     PowerTOP version 1.10      (C) 2007 Intel Corporation

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        (71.6%)         1333 Mhz     0.0%
C0                0.0ms ( 0.0%)         1200 Mhz     0.0%
C1                0.0ms (614891469122.  1067 Mhz     0.0%
C2                0.5ms ( 0.1%)          800 Mhz   100.0%
C4                3.8ms (29.5%)

Wakeups-from-idle per second : 54.4     interval: 15.0s
Power usage (ACPI estimate): 10.0W (4.4 hours)

Top causes for wakeups:
  26.8% ( 41.3)      <kernel IPI> : Rescheduling interrupts
  20.7% ( 31.9)       <interrupt> : uhci_hcd:usb4, HDA Intel
  11.8% ( 18.1)       <interrupt> : iwlagn
  10.1% ( 15.5)       <interrupt> : extra timer interrupt
   5.7% (  8.7)     <kernel core> : hrtimer_start (tick_sched_timer)
   5.2% (  8.0)   <kernel module> : mod_timer (rh_timer_func)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*** 2.6.28-rc4 on battery after settling down ***
     PowerTOP version 1.10      (C) 2007 Intel Corporation

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        ( 0.6%)         1333 Mhz     0.0%
C0                0.0ms ( 0.0%)         1200 Mhz     0.0%
C1                0.0ms ( 0.0%)         1067 Mhz     0.0%
C2                8.1ms ( 0.4%)          800 Mhz   100.0%
C4               14.5ms (99.0%)

Wakeups-from-idle per second : 69.0     interval: 15.0s
Power usage (ACPI estimate): 8.7W (4.9 hours) (long term: 26.2W,/1.6h)

Top causes for wakeups:
  24.0% ( 21.4)      <kernel IPI> : Rescheduling interrupts
  17.8% ( 15.9)       <interrupt> : extra timer interrupt
  15.7% ( 14.0)       <interrupt> : iwlagn
  10.9% (  9.7)     <kernel core> : hrtimer_start (tick_sched_timer)
   9.0% (  8.0)   <kernel module> : mod_timer (rh_timer_func)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*** 2.6.28-rc4 on mains again ***
     PowerTOP version 1.10      (C) 2007 Intel Corporation

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        ( 0.3%)         1333 Mhz     0.0%
C0                0.0ms ( 0.0%)         1200 Mhz     0.0%
C1                0.0ms ( 0.0%)         1067 Mhz     0.0%
C3               17.5ms (99.7%)          800 Mhz   100.0%


Wakeups-from-idle per second : 57.1     interval: 15.0s
no ACPI power usage estimate available

Top causes for wakeups:
  26.4% ( 17.7)      <kernel IPI> : Rescheduling interrupts
  15.1% ( 10.1)       <interrupt> : iwlagn
  11.9% (  8.0)   <kernel module> : mod_timer (rh_timer_func)
   8.9% (  6.0)       <interrupt> : extra timer interrupt
   8.4% (  5.7)     <kernel core> : hrtimer_start (tick_sched_timer)

Re: Bootup time regression from 2.6.27 to 2.6.28-rc3+

[Arjan van de Ven]

On Sat, 15 Nov 2008 18:16:31 +0100
Frans Pop <elendil@planet.nl> wrote:

> On Friday 14 November 2008, Frans Pop wrote:
> > > Find below the lineup of the timers-fixes-for-linus branch of the
> > > tip tree (the same as Arjan posted minus the irq fixes)
> >
> > Could either of you maybe give a status update on this patch set and
> > the remaining issues with it that were reported (especially the
> > high C0 reported by powertop)?
> 
> I guess part of the answer is:
> commit ae99286b4f1be7788f2d6947c66a91dbd6351eec
> Author: Thomas Gleixner <tglx@linutronix.de>
> Date:   Mon Nov 10 13:20:23 2008 +0100
>     nohz: disable tick_nohz_kick_tick() for now
> 
> I've just done some testing using v2.6.28-rc4-322-g58e20d8 which
> includes this patch.
> 
> CPU usage reported by powertop is now normal again (close to 100% in 
> lowest C state), but I'm still getting high counts for:
> - <kernel IPI> : Rescheduling interrupts
>   Typically 3-5 on .26/.27; 15-17 on .28.

these are caused by the scheduler, not by the timer code.
(And sometimes they're caused by the scheduler on behalf of something
else even)

> - <interrupt>  : extra timer interrupt
>   Consistently more prominent for .28 (though not with high values)

if it's less than 5 total, don't worry about it, some of that can well
be rounding/measurement effects
(powertop has to make a few approximations around the edges of the
measurement interval because things don't always line up perfectly)

>   than for .27, but way better than for .26.
> 
> 
> powertop questions
> ------------------
> - What's with this change from "polling" to "C0" for the 2nd C state?

that sounds like an interesting bug...

>   After boot I always (both when booted on mains and on battery) get
>   "polling", but after inserting or removing mains it will continue to
>   show "C0" independent of any further power state changes.
> - After switching to battery the first time I get something like:
>   C1                0.0ms (614891469122.
>   This is reproducible. I guess a rounding error due to the change in
>   the number of C states. Later updates clear this.

yeah it's annoying but it is only for one display period

> - Looks like someone could not make up his mind between comma and
> slash here: "(long term: 26.2W,/1.6h)"

that sounds easy to fix ;-)

Thanks for the bugreports; either me or Auke will take a look at these
shortly.

-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org

[2.6.28-rc5] TSC sync error and high hrtimer_start (was: Bootup time regression from 2.6.27 to 2.6.28-rc3+)

[Frans Pop]

On Friday 14 November 2008, Frans Pop wrote:
> Could either of you maybe give a status update on this patch set and
> the remaining issues with it that were reported (especially the high C0
> reported by powertop)?

My previous tests were on my laptop. This is for my desktop running -rc5.
I had not tested my desktop with earlier .28 releases.

For .28 powertop prominently shows hrtimer_start (tick_sched_timer) which
was not present for .27. The list below that is virtually identical to .27.

Total wakeups for .28 is lower though. Something to look into or not?

Possibly this may be related to this diff in the boot messages:
-checking TSC synchronization [CPU#0 -> CPU#1]: passed.
+checking TSC synchronization [CPU#0 -> CPU#1]:
+Measured 696 cycles TSC warp between CPUs, turning off TSC clock.
+Marking TSC unstable due to check_tsc_sync_source failed

With .27.4 TSC _always_ passed. Now, with .28-rc5 I get this warp. I've
done two boots so far, for the other one the warp was 680 cycles.

Cheers,
FJP

Powertop output for idle system:
*** 2.6.27.4 ***
Wakeups-from-idle per second : 68.7     interval: 10.0s
no ACPI power usage estimate available

Top causes for wakeups:
  31.5% ( 17.8)     <kernel core> : __mod_timer (neigh_periodic_timer)
  14.5% (  8.2)   <kernel module> : mod_timer (rh_timer_func)
  11.3% (  6.4)             artsd : __mod_timer (process_timeout)
   9.2% (  5.2)        ksysguardd : __mod_timer (process_timeout)
   4.2% (  2.4)            kicker : __mod_timer (process_timeout)
   3.5% (  2.0)     <kernel core> : add_timer_on (clocksource_watchdog)

*** 2.6.28-rc5 ***
Wakeups-from-idle per second : 55.6     interval: 10.0s
no ACPI power usage estimate available

Top causes for wakeups:
  28.5% ( 23.4)     <kernel core> : hrtimer_start (tick_sched_timer)
  21.7% ( 17.8)     <kernel core> : __mod_timer (neigh_periodic_timer)
   9.7% (  8.0)   <kernel module> : mod_timer (rh_timer_func)
   7.8% (  6.4)             artsd : schedule_hrtimeout_range (hrtimer_wakeup)
   5.4% (  4.4)        ksysguardd : __mod_timer (process_timeout)
   2.8% (  2.3)            kicker : schedule_hrtimeout_range (hrtimer_wakeup)
   2.4% (  2.0)     <kernel core> : add_timer_on (clocksource_watchdog)

Re: [2.6.28-rc5] TSC sync error and high hrtimer_start (was: Bootup time regression from 2.6.27 to 2.6.28-rc3+)

[Frans Pop]

On Sunday 16 November 2008, Frans Pop wrote:
> Possibly this may be related to this diff in the boot messages:
> -checking TSC synchronization [CPU#0 -> CPU#1]: passed.
> +checking TSC synchronization [CPU#0 -> CPU#1]:
> +Measured 696 cycles TSC warp between CPUs, turning off TSC clock.
> +Marking TSC unstable due to check_tsc_sync_source failed
>
> With .27.4 TSC _always_ passed. Now, with .28-rc5 I get this warp. I've
> done two boots so far, for the other one the warp was 680 cycles.

Maybe this extra context a bit earlier in dmesg is relevant here:

-Calibrating delay loop (skipped), value calculated using timer frequency.. 6399.76 BogoMIPS (lpj=12799520)
+HPET: 3 timers in total, 0 timers will be used for per-cpu timer
+Calibrating delay loop (skipped), value calculated using timer frequency.. 6399.73 BogoMIPS (lpj=12799476)
[...]
-ACPI: Core revision 20080609
+ACPI: Core revision 20080926
+Setting APIC routing to flat
 ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
 CPU0: Intel(R) Pentium(R) D CPU 3.20GHz stepping 07
-Using local APIC timer interrupts.
-APIC timer calibration result 12499520
-Detected 12.499 MHz APIC timer.
-Booting processor 1/1 ip 6000
+Booting processor 1 APIC 0x1 ip 0x6000
 Initializing CPU#1
-Calibrating delay using timer specific routine.. 6399.94 BogoMIPS (lpj=12799898)
+Calibrating delay using timer specific routine.. 6198.05 BogoMIPS (lpj=12396107)

Note the rather large difference in BogoMIPS between core 0 and 1.