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Corrado Zoccolo 672917dcc7 cpuidle: menu governor: reduce latency on exit 
Move the state residency accounting and statistics computation off the hot
exit path.

On exit, the need to recompute statistics is recorded, and new statistics
will be computed when menu_select is called again.

The expected effect is to reduce processor wakeup latency from sleep
(C-states).  We are speaking of few hundreds of cycles reduction out of a
several microseconds latency (determined by the hardware transition), so
it is difficult to measure.

Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Adam Belay <abelay@novell.com
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2009-09-22 07:17:45 -07:00
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accessibility
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acpi x86: Trivial whitespace cleanups 2009-09-20 20:18:57 +02:00
amba
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ata libata: Add pata_atp867x driver for Artop/Acard ATP867X controllers 2009-09-17 16:47:06 -04:00
atm
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auxdisplay
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base mm: oom analysis: add shmem vmstat 2009-09-22 07:17:27 -07:00
block const: make block_device_operations const 2009-09-22 07:17:25 -07:00
bluetooth pcmcia: dtl1_cs: fix pcmcia_loop_config logic 2009-09-15 10:17:16 -07:00
cdrom const: make block_device_operations const 2009-09-22 07:17:25 -07:00
char pcmcia: fix read buffer overflow 2009-09-22 07:17:42 -07:00
clocksource
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connector
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cpufreq Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq 2009-09-18 09:16:57 -07:00
cpuidle cpuidle: menu governor: reduce latency on exit 2009-09-22 07:17:45 -07:00
crypto
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dca
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dio
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dma at_hdmac: Rework suspend_late()/resume_early() 2009-09-14 20:27:00 +02:00
edac amd64_edac: check NB MCE bank enable on the current node properly 2009-09-16 13:05:46 +02:00
eisa
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firewire driver model: constify attribute groups 2009-09-15 09:50:47 -07:00
firmware mm: don't use alloc_bootmem_low() where not strictly needed 2009-09-22 07:17:38 -07:00
gpio gpio: Add WM831X GPIO driver 2009-09-17 09:47:01 +02:00
gpu Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2009-09-21 08:10:09 -07:00
hid Driver-Core: extend devnode callbacks to provide permissions 2009-09-19 12:50:38 -07:00
hwmon Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6 2009-09-18 09:22:36 -07:00
i2c [PATCH] i2c-imx: make bus available early 2009-09-19 23:36:56 +01:00
ide const: make block_device_operations const 2009-09-22 07:17:25 -07:00
idle
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ieee1394
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ieee802154
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infiniband driver model: constify attribute groups 2009-09-15 09:50:47 -07:00
input Driver-Core: extend devnode callbacks to provide permissions 2009-09-19 12:50:38 -07:00
isdn const: mark remaining super_operations const 2009-09-22 07:17:24 -07:00
leds
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lguest
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macintosh Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2009-09-15 09:51:09 -07:00
mca
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md md: avoid use of broken kzalloc mempool 2009-09-22 07:17:35 -07:00
media drivers/media/dvb/pt1/pt1.c needs vmalloc.h 2009-09-22 07:17:23 -07:00
memstick const: make block_device_operations const 2009-09-22 07:17:25 -07:00
message const: make block_device_operations const 2009-09-22 07:17:25 -07:00
mfd drivers/mfd/ab3100-core.c: fix powerpc build error 2009-09-22 07:17:24 -07:00
misc const: mark remaining super_operations const 2009-09-22 07:17:24 -07:00
mmc const: make block_device_operations const 2009-09-22 07:17:25 -07:00
mtd const: make block_device_operations const 2009-09-22 07:17:25 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2009-09-20 15:55:39 -07:00
nubus
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of
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oprofile const: mark remaining super_operations const 2009-09-22 07:17:24 -07:00
parisc mm: replace various uses of num_physpages by totalram_pages 2009-09-22 07:17:38 -07:00
parport
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pci Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2009-09-16 07:49:54 -07:00
pcmcia pcmcia: cleanup/fixup patch for sa1100_jornada_pcmcia driver 2009-09-22 07:17:42 -07:00
platform hp-wmi: Switch driver to dev_pm_ops 2009-09-14 20:26:59 +02:00
pnp
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power
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pps
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ps3
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rapidio
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regulator regulator: Voltage count for AB3100 2009-09-17 15:48:24 +02:00
rtc Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 2009-09-18 09:43:09 -07:00
s390 const: make block_device_operations const 2009-09-22 07:17:25 -07:00
sbus const: make block_device_operations const 2009-09-22 07:17:25 -07:00
scsi const: make block_device_operations const 2009-09-22 07:17:25 -07:00
serial uartlite: support shared interrupt lines 2009-09-19 13:13:38 -07:00
sh
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sn
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spi
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ssb ssb/sdio: fix printk format warnings 2009-09-16 16:21:00 -04:00
staging Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2009-09-21 09:03:10 -07:00
tc
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telephony
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thermal
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uio Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 2009-09-18 09:43:09 -07:00
usb const: mark remaining super_operations const 2009-09-22 07:17:24 -07:00
uwb Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/dvrabel/uwb 2009-09-17 09:44:09 -07:00
video includecheck fix: drivers/video, vgacon.c 2009-09-20 16:01:58 +05:30
virtio
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vlynq
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w1
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watchdog [WATCHDOG] sizeof cleanup 2009-09-18 08:39:37 +00:00
xen mm: replace various uses of num_physpages by totalram_pages 2009-09-22 07:17:38 -07:00
zorro
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Kconfig
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Makefile
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