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Venki Pallipadi ea48761519 [CPUFREQ] ondemand: fix tickless accounting and software coordination bug 
With tickless kernel and software coordination os P-states, ondemand
can look at wrong idle statistics. This can happen when ondemand sampling
is happening on CPU 0 and due to software coordination sampling also looks at
utilization of CPU 1. If CPU 1 is in tickless state at that moment, its idle
statistics will not be uptodate and CPU 0 thinks CPU 1 is idle for less
amount of time than it actually is.

This can be resolved by looking at all the busy times of CPUs, which is
accurate, even with tickless, and use that to determine idle time in a
round about way (total time - busy time).

Thanks to Arjan for originally reporting the ondemand bug on
Lenovo T61.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2007-06-21 12:57:53 -04:00
..
acorn
acpi Pull misc-for-upstream into release branch 2007-05-10 04:06:12 -04:00
amba
ata Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2007-05-12 18:11:33 -07:00
atm Use menuconfig objects II - netdev/atm 2007-05-11 17:53:21 -04:00
auxdisplay [S390] Kconfig: refine depends statements. 2007-05-10 15:46:07 +02:00
base Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-05-09 12:54:17 -07:00
block fix the dynamic allocation and probe in loop.c 2007-05-12 16:53:02 -07:00
bluetooth [Bluetooth] Fix unintentional fall-through in HCI line discipline 2007-05-10 23:45:06 -07:00
cdrom mm: remove destroy_dirty_buffers from invalidate_bdev() 2007-05-07 12:12:55 -07:00
char IPMI: Add PPC openfirmware unregister 2007-05-12 10:55:40 -07:00
clocksource
connector
cpufreq [CPUFREQ] ondemand: fix tickless accounting and software coordination bug 2007-06-21 12:57:53 -04:00
crypto [S390] Kconfig: use common Kconfig files for s390. 2007-05-10 15:46:08 +02:00
dio
dma [S390] Kconfig: unwanted menus for s390. 2007-05-10 15:46:07 +02:00
edac [S390] Kconfig: menus with depends on HAS_IOMEM. 2007-05-10 15:46:07 +02:00
eisa virtual_eisa_root_init() should be __init 2007-05-08 11:15:02 -07:00
fc4
firewire firewire: Convert OHCI driver to use standard goto unwinding for error handling. 2007-05-10 18:24:14 +02:00
firmware remove "struct subsystem" as it is no longer needed 2007-05-02 18:57:59 -07:00
hid USB HID: hiddev - fix race between hiddev_send_event() and hiddev_release() 2007-05-10 08:45:56 +02:00
hwmon Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6 2007-05-10 11:50:51 -07:00
i2c Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6 2007-05-10 11:50:51 -07:00
ide [ARM] ecard: add ecardm_iomap() / ecardm_iounmap() 2007-05-11 17:19:02 +01:00
ieee1394 Merge branch 'juju' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2007-05-10 13:30:08 -07:00
infiniband [S390] Kconfig: menus with depends on HAS_IOMEM. 2007-05-10 15:46:07 +02:00
input Input: evdev - fix overflow in compat_ioctl 2007-05-11 09:08:04 -07:00
isdn [S390] Kconfig: unwanted menus for s390. 2007-05-10 15:46:07 +02:00
kvm [S390] Kconfig: refine depends statements. 2007-05-10 15:46:07 +02:00
leds [S390] Kconfig: menus with depends on HAS_IOMEM. 2007-05-10 15:46:07 +02:00
macintosh Merge master.kernel.org:/pub/scm/linux/kernel/git/bart/ide-2.6 2007-05-09 15:41:31 -07:00
mca mca: add integrated device bus matching 2007-05-09 12:30:49 -07:00
md md: improve the is_mddev_idle test 2007-05-11 08:29:37 -07:00
media Merge branch 'master' of ssh://master.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb 2007-05-11 12:57:16 -07:00
message [S390] Kconfig: refine depends statements. 2007-05-10 15:46:07 +02:00
mfd [S390] Kconfig: menus with depends on HAS_IOMEM. 2007-05-10 15:46:07 +02:00
misc Pull misc-for-upstream into release branch 2007-05-10 04:06:12 -04:00
mmc [S390] Kconfig: menus with depends on HAS_IOMEM. 2007-05-10 15:46:07 +02:00
mtd [S390] Kconfig: menus with depends on HAS_IOMEM. 2007-05-10 15:46:07 +02:00
net Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2007-05-12 18:11:33 -07:00
nubus
oprofile
parisc header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
parport [S390] Kconfig: menus with depends on HAS_IOMEM. 2007-05-10 15:46:07 +02:00
pci Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev 2007-05-11 16:03:03 -07:00
pcmcia fix hotplug for legacy platform drivers 2007-05-08 11:15:10 -07:00
pnp [S390] Kconfig: menus with depends on HAS_IOMEM. 2007-05-10 15:46:07 +02:00
ps3 Merge branch 'linux-2.6' 2007-05-08 13:37:51 +10:00
rapidio
rtc Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus 2007-05-11 09:59:50 -07:00
s390 [S390] Kconfig: use common Kconfig files for s390. 2007-05-10 15:46:08 +02:00
sbus [SPARC64]: envctrl.c needs asm/io.h 2007-05-11 21:39:25 -07:00
scsi Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2007-05-12 18:11:33 -07:00
serial [ARM] 4332/2: KS8695: Serial driver 2007-05-11 22:02:52 +01:00
sh
sn
spi MPC52xx PSC SPI master driver 2007-05-11 08:29:35 -07:00
tc
telephony [S390] Kconfig: menus with depends on HAS_IOMEM. 2007-05-10 15:46:07 +02:00
usb [ARM] 4370/3: AT91: Support for Atmel AT91SAM9RL processors. 2007-05-11 21:07:54 +01:00
video pm3fb: Fix compile error if module 2007-05-12 09:47:15 -07:00
w1 [S390] Kconfig: menus with depends on HAS_IOMEM. 2007-05-10 15:46:07 +02:00
zorro Amiga Zorro bus: kill resource_size_t warnings 2007-05-04 17:59:08 -07:00
Kconfig
Makefile Merge branch 'juju' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2007-05-10 13:30:08 -07:00