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Len Brown 024df8e28d x86 idle: Repair large-server 50-watt idle-power regression 
commit 40e2d7f9b5 upstream.

Linux 3.10 changed the timing of how thread_info->flags is touched:

	x86: Use generic idle loop
	(7d1a941731)

This caused Intel NHM-EX and WSM-EX servers to experience a large number
of immediate MONITOR/MWAIT break wakeups, which caused cpuidle to demote
from deep C-states to shallow C-states, which caused these platforms
to experience a significant increase in idle power.

Note that this issue was already present before the commit above,
however, it wasn't seen often enough to be noticed in power measurements.

Here we extend an errata workaround from the Core2 EX "Dunnington"
to extend to NHM-EX and WSM-EX, to prevent these immediate
returns from MWAIT, reducing idle power on these platforms.

While only acpi_idle ran on Dunnington, intel_idle
may also run on these two newer systems.
As of today, there are no other models that are known
to need this tweak.

Link: http://lkml.kernel.org/r/CAJvTdK=%2BaNN66mYpCGgbHGCHhYQAKx-vB0kJSWjVpsNb_hOAtQ@mail.gmail.com
Signed-off-by: Len Brown <len.brown@intel.com>
Link: http://lkml.kernel.org/r/baff264285f6e585df757d58b17788feabc68918.1387403066.git.len.brown@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-01-09 12:24:21 -08:00
..
accessibility
acpi ACPI / hotplug: Fix conflicted PCI bridge notify handlers 2013-12-04 10:57:04 -08:00
amba
ata SCSI: Disable WRITE SAME for RAID and virtual host adapter drivers 2013-12-11 22:36:28 -08:00
atm atm: idt77252: fix dev refcnt leak 2013-12-08 07:29:25 -08:00
auxdisplay
base PM / runtime: Use pm_runtime_put_sync() in __device_release_driver() 2013-12-04 10:56:59 -08:00
bcma bcma: add more core IDs 2013-05-17 14:31:05 -04:00
block xen/blkback: fix reference counting 2013-12-04 10:56:25 -08:00
bluetooth Bluetooth: Add support for BCM20702A0 [0b05, 17cb] 2013-10-13 16:08:32 -07:00
bus
cdrom drivers/cdrom/cdrom.c: use kzalloc() for failing hardware 2013-07-13 11:42:26 -07:00
char drivers/char/i8k.c: add Dell XPLS L421X 2013-12-11 22:36:29 -08:00
clk clk: armada-370: fix tclk frequencies 2013-12-04 10:57:19 -08:00
clocksource clocksource: dw_apb: Fix error check 2013-07-25 14:07:29 -07:00
connector connector: improved unaligned access error fix 2013-12-08 07:29:25 -08:00
cpufreq cpufreq: highbank-cpufreq: Enable Midway/ECX-2000 2013-12-04 10:57:18 -08:00
cpuidle cpuidle: coupled: fix race condition between pokes and safe state 2013-09-26 17:18:02 -07:00
crypto crypto: caam - Fixed the memory out of bound overwrite issue 2013-08-04 16:50:57 +08:00
dca
devfreq
dio
dma ioatdma: fix selection of 16 vs 8 source path 2013-12-04 10:56:45 -08:00
edac edac, highbank: Fix interrupt setup of mem and l2 controller 2013-12-04 10:57:15 -08:00
eisa
extcon Removal of GENERIC_GPIO for v3.10 2013-05-09 09:59:16 -07:00
firewire SCSI: Disable WRITE SAME for RAID and virtual host adapter drivers 2013-12-11 22:36:28 -08:00
firmware dmi: add support for exact DMI matches in addition to substring matching 2013-11-29 11:11:53 -08:00
gpio powerpc/gpio: Fix the wrong GPIO input data on MPC8572/MPC8536 2013-12-11 22:36:27 -08:00
gpu drm/radeon: fixup bad vram size on SI 2013-12-20 07:45:10 -08:00
hid HID: usbhid: quirk for SiS Touchscreen 2013-12-11 22:36:28 -08:00
hsi
hv Drivers: hv: balloon: Do not post pressure status if interrupted 2013-08-04 16:50:58 +08:00
hwmon hwmon: (w83l768ng) Fix fan speed control range 2013-12-20 07:45:08 -08:00
hwspinlock
i2c i2c: mux: gpio: use gpio_set_value_cansleep() 2013-12-04 10:55:50 -08:00
ide
idle x86 idle: Repair large-server 50-watt idle-power regression 2014-01-09 12:24:21 -08:00
iio iio:adc:ad7887 Fix channel reported endianness from cpu to big endian 2014-01-09 12:24:20 -08:00
infiniband iser-target: fix error return code in isert_create_device_ib_res() 2014-01-09 12:24:20 -08:00
input Input: usbtouchscreen - separate report and transmit buffer size handling 2013-12-20 07:45:08 -08:00
iommu iommu: Remove stack trace from broken irq remapping warning 2013-12-08 07:29:27 -08:00
ipack
irqchip ARM: SoC fixes for 3.10-rc 2013-06-22 09:44:45 -10:00
isdn net: rework recvmsg handler msg_name and msg_namelen logic 2013-12-08 07:29:25 -08:00
leds leds: wm831x-status: Request a REG resource 2013-09-26 17:18:27 -07:00
lguest
macintosh powerpc/windfarm: Fix noisy slots-fan on Xserve (rm31) 2013-08-11 18:35:20 -07:00
mailbox
md dm thin: switch to read only mode if a mapping insert fails 2013-12-20 07:45:11 -08:00
media cxd2820r_core: fix sparse warnings 2013-12-20 07:45:11 -08:00
memory drivers/memory: don't check resource with devm_ioremap_resource 2013-05-18 11:55:52 +02:00
memstick
message
mfd mfd: tps6586x: correct device name of the regulator cell 2013-06-24 12:37:47 +01:00
misc mei: add 9 series PCH mei device ids 2013-12-11 22:36:28 -08:00
mmc mmc: block: fix a bug of error handling in MMC driver 2013-12-08 07:29:27 -08:00
mtd mtd: gpmi: fix kernel BUG due to racing DMA operations 2013-12-04 10:56:23 -08:00
net can: peak_usb: fix mem leak in pcan_usb_pro_init() 2014-01-09 12:24:20 -08:00
nfc NFC: mei: Do not disable MEI devices from their remove routine 2013-05-21 10:48:41 +02:00
ntb NTB: Correct debugfs to work with more than 1 NTB Device 2013-11-13 12:05:35 +09:00
nubus
of of: Fix missing memory initialization on FDT unflattening 2013-09-26 17:18:29 -07:00
oprofile
parisc parisc: Fix interrupt routing for C8000 serial ports 2013-08-11 18:35:21 -07:00
parport parisc: parport0: fix this legacy no-device port driver! 2013-06-01 14:46:42 +02:00
pci PCI: Disable Bus Master only on kexec reboot 2013-12-20 07:45:08 -08:00
pcmcia pcmcia: at91_cf: fix gpio_get_value in at91_cf_get_status 2013-07-21 18:21:25 -07:00
pinctrl pinctrl: dove: unset twsi option3 for gconfig as well 2013-12-04 10:55:49 -08:00
platform drivers/platform/olpc/olpc-ec.c: initialise earlier 2013-08-29 09:47:38 -07:00
pnp
power charger-manager: Ensure event is not used as format string 2013-07-13 11:42:26 -07:00
pps
ps3
ptp ptp_pch: fix error handling in pch_probe() 2013-05-25 21:24:15 -07:00
pwm drivers/pwm: don't check resource with devm_ioremap_resource 2013-05-18 11:55:58 +02:00
rapidio RAPIDIO: IDT_GEN2: Fix build error. 2013-07-28 16:30:07 -07:00
regulator mfd: tps6586x: correct device name of the regulator cell 2013-06-24 12:37:47 +01:00
remoteproc
reset
rpmsg
rtc drivers/rtc/rtc-at91rm9200.c: correct alarm over day/month wrap 2013-12-20 07:45:09 -08:00
s390 qeth: avoid buffer overflow in snmp ioctl 2013-12-04 10:56:37 -08:00
sbus
scsi SCSI: Disable WRITE SAME for RAID and virtual host adapter drivers 2013-12-11 22:36:28 -08:00
sfi
sh
sn
spi spi: spi-davinci: Fix direction in dma_map_single() 2013-08-11 18:35:25 -07:00
ssb - Lots of cleanups from Artem, including deletion of some obsolete drivers 2013-05-09 10:15:46 -07:00
ssbi
staging staging: comedi: 8255_pci: fix for newer PCI-DIO48H 2014-01-09 12:24:19 -08:00
target target/file: Update hw_max_sectors based on current block_size 2014-01-09 12:24:20 -08:00
tc
thermal drivers/thermal: don't check resource with devm_ioremap_resource 2013-05-18 11:57:30 +02:00
tty serial: 8250_dw: add new ACPI IDs 2014-01-09 12:24:20 -08:00
uio Fix a few incorrectly checked [io_]remap_pfn_range() calls 2013-11-13 12:05:33 +09:00
usb usb: cdc-wdm: manage_power should always set needs_remote_wakeup 2014-01-09 12:24:20 -08:00
uwb
vfio vfio: fix crash on rmmod 2013-06-05 08:54:16 -06:00
vhost vhost/scsi: Fix incorrect usage of get_user_pages_fast write parameter 2013-11-13 12:05:32 +09:00
video video: kyro: fix incorrect sizes when copying to userspace 2013-12-08 07:29:27 -08:00
virt
virtio virtio: support unlocked queue poll 2013-07-28 16:29:55 -07:00
vlynq
vme
w1 drivers/w1/masters: don't check resource with devm_ioremap_resource 2013-05-18 11:58:03 +02:00
watchdog sc1200_wdt: Fix oops 2013-12-20 07:45:11 -08:00
xen xen/gnttab: leave lazy MMU mode in the case of a m2p override failure 2013-12-11 22:36:27 -08:00
zorro
Kconfig
Makefile