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Len Brown 40e2d7f9b5 x86 idle: Repair large-server 50-watt idle-power regression 
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
Cc: <stable@vger.kernel.org> # 3.12.x, 3.11.x, 3.10.x
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
 		2013-12-19 11:47:39 -08:00
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accessibility
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acpi Merge branch 'acpica' 2013-11-27 01:03:27 +01:00
amba
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ata SCSI fixes on 20131206 2013-12-06 08:30:18 -08:00
atm atm: idt77252: fix dev refcnt leak 2013-11-19 15:53:02 -05:00
auxdisplay
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base Revert "cpufreq: suspend governors on system suspend/hibernate" 2013-12-08 01:04:17 +01:00
bcma Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2013-11-13 17:40:34 +09:00
block null_blk: mem garbage on NUMA systems during init 2013-12-15 12:17:16 -08:00
bluetooth
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bus Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2013-11-14 08:51:29 +09:00
cdrom
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char Char/Misc driver fixes for 3.13-rc3 2013-12-08 18:47:25 -08:00
clk Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
clocksource clocksource: arm_arch_timer: Hide eventstream Kconfig on non-ARM 2013-11-21 00:06:52 +01:00
connector connector: improved unaligned access error fix 2013-11-14 17:19:20 -05:00
cpufreq cpufreq_ at32ap-cpufreq.c: Fix section mismatch 2013-12-10 08:46:38 +01:00
cpuidle cpuidle: Check for dev before deregistering it. 2013-12-03 22:05:22 +01:00
crypto crypto: talitos - fix aead sglen for case 'dst != src' 2013-11-28 22:25:17 +08:00
dca
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devfreq
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dio
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dma dma: fix build breakage in s3c24xx-dma 2013-12-04 11:24:30 +05:30
edac sb_edac: Shut up compiler warning when EDAC_DEBUG is enabled 2013-11-30 12:26:36 +01:00
eisa
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extcon extcon: remove freed groups caused the panic or warning in unregister flow 2013-11-26 15:17:23 +09:00
firewire [SCSI] Disable WRITE SAME for RAID and virtual host adapter drivers 2013-11-29 08:48:39 +04:00
firmware efi-pstore: Make efi-pstore return a unique id 2013-11-29 10:11:06 +00:00
fmc
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gpio A rather big fix for a regression where we have dropped omap4 hwmod 2013-12-09 15:38:41 -08:00
gpu radeon_pm: fix oops in hwmon_attributes_visible() and radeon_hwmon_show_temp_thresh() 2013-12-15 12:16:00 -08:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2013-12-13 13:21:28 -08:00
hsi
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hv
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hwmon hwmon fixes for 3.13-rc4 2013-12-12 11:05:19 -08:00
hwspinlock
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i2c i2c: imx: Check the return value from clk_prepare_enable() 2013-12-12 22:48:22 +01:00
ide More ACPI and power management updates for 3.13-rc1 2013-11-20 13:25:04 -08:00
idle x86 idle: Repair large-server 50-watt idle-power regression 2013-12-19 11:47:39 -08:00
iio Fix build failure for gp2ap020a00f.c 2013-12-02 21:11:30 +00:00
infiniband Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2013-11-22 10:52:03 -08:00
input Input: adxl34x - Fix bug in definition of ADXL346_2D_ORIENT 2013-12-09 22:23:31 -08:00
iommu iommu/arm-smmu: fix error return code in arm_smmu_device_dt_probe() 2013-12-06 16:44:25 +00:00
ipack
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irqchip Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-12-02 10:15:39 -08:00
isdn net: rework recvmsg handler msg_name and msg_namelen logic 2013-11-20 21:52:30 -05:00
leds leds: pwm: Fix for deferred probe in DT booted mode 2013-12-02 11:53:17 -08:00
lguest
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macintosh powerpc/windfarm: Fix XServe G5 fan control Makefile issue 2013-11-27 11:35:47 +11:00
mailbox
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md A set of device-mapper fixes for 3.13. 2013-12-13 13:22:22 -08:00
media [media] videobuf2-dma-sg: fix possible memory leak 2013-12-10 05:40:57 -02:00
memory
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memstick tree-wide: use reinit_completion instead of INIT_COMPLETION 2013-11-15 09:32:21 +09:00
message drivers/message/i2o/driver.c: add missing destroy_workqueue() on error in i2o_driver_register() 2013-11-13 12:09:26 +09:00
mfd mfd/rtc: s5m: fix register updating by adding regmap for RTC 2013-12-12 18:19:26 -08:00
misc Char/Misc driver fixes for 3.13-rc3 2013-12-08 18:47:25 -08:00
mmc mmc: omap: Fix I2C dependency and make driver usable with device tree 2013-11-26 15:51:16 -08:00
mtd mtd: nand: pxa3xx: Use info->use_dma to release DMA resources 2013-12-12 15:02:04 -08:00
net igb: Fix for issue where values could be too high for udelay function. 2013-12-14 22:59:42 -05:00
nfc
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ntb NTB driver bug fixes to address a missed call to pci_enable_msix, 2013-11-26 11:15:12 -08:00
nubus
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of Merge branch 'for-linus-dma-masks' of git://git.linaro.org/people/rmk/linux-arm 2013-11-14 07:55:21 +09:00
oprofile
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parisc
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parport Kconfig cleanups for v3.13 2013-11-15 14:05:15 -08:00
pci Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-12-15 11:56:47 -08:00
pcmcia DeviceTree updates for 3.13. This is a bit larger pull request than 2013-11-12 16:52:17 +09:00
phy
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pinctrl sh-pfc: sh7372: Fix pin bias setup 2013-12-03 10:38:41 +01:00
platform sony-laptop: do not scribble keyboard backlight registers on resume 2013-11-26 13:03:36 +09:00
pnp PNP: fix restoring devices after hibernation 2013-12-05 02:01:55 +01:00
power Highlights: 2013-11-18 15:35:09 -08:00
powercap PowerCap: Fix mode for energy counter 2013-12-05 02:05:48 +01:00
pps drivers/pps/clients/pps-gpio.c: remove redundant of_match_ptr 2013-11-13 12:09:35 +09:00
ps3
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ptp
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pwm
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rapidio
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regulator regulator: Fixes for v3.13 2013-12-13 11:39:54 -08:00
remoteproc
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reset
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rpmsg
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rtc mfd/rtc: s5m: fix register updating by adding regmap for RTC 2013-12-12 18:19:26 -08:00
s390 s390/sclp: replace uninitialized early_event_mask_sccb variable with sccb_early 2013-12-02 15:31:07 +01:00
sbus
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scsi SCSI fixes on 20131206 2013-12-06 08:30:18 -08:00
sfi
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sh
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sn
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spi Merge remote-tracking branches 'spi/fix/bcm2835', 'spi/fix/bcm63xx', 'spi/fix/mpc512x-psc', 'spi/fix/mxs', 'spi/fix/pxa2xx', 'spi/fix/qspi', 'spi/fix/rspi' and 'spi/fix/txx9' into spi-linus 2013-11-28 11:31:35 +00:00
ssb
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staging Staging: TIDSPBRIDGE: Use vm_iomap_memory for mmap-ing instead of remap_pfn_range 2013-12-03 09:42:45 -08:00
target Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2013-11-22 10:52:03 -08:00
tc
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thermal Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-11-19 15:50:47 -08:00
tty n_tty: Fix missing newline echo 2013-11-29 12:53:19 -08:00
uio uio: we cannot mmap unaligned page contents 2013-12-02 11:50:37 -08:00
usb usb: hub: Use correct reset for wedged USB3 devices that are NOTATTACHED 2013-12-04 17:00:43 -08:00
uwb
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vfio
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vhost Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2013-11-22 10:52:03 -08:00
video Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-12-09 19:21:39 -08:00
virt
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virtio Nothing really exciting: some groundwork for changing virtio endian, and 2013-11-15 13:28:47 +09:00
vlynq
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vme
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w1 drivers/w1/masters/w1-gpio.c: use dev_get_platdata() 2013-11-15 09:32:21 +09:00
watchdog sc1200_wdt: Fix oops 2013-12-10 08:48:15 +01:00
xen Bug-fixes: 2013-12-02 10:12:01 -08:00
zorro
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Kconfig ACPI and power management updates for 3.13-rc1 2013-11-14 13:41:48 +09:00
Makefile ACPI and power management updates for 3.13-rc1 2013-11-14 13:41:48 +09:00