Commit 448817bd authored by Mauro Ribeiro's avatar Mauro Ribeiro

Samsung sources drop

parent 0a4b6d4f

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filesystems/dnotify_test
laptops/dslm
timers/hpet_example
vm/hugepage-mmap
vm/hugepage-shm
vm/map_hugetlb
*.xml
*.ps
*.pdf
*.html
*.9.gz
*.9
*.aux
*.dvi
*.log
*.out
*.png
*.gif
media-indices.tmpl
media-entities.tmpl
=============
A N D R O I D
=============
Copyright (C) 2009 Google, Inc.
Written by Mike Chan <mike@android.com>
CONTENTS:
---------
1. Android
1.1 Required enabled config options
1.2 Required disabled config options
1.3 Recommended enabled config options
2. Contact
1. Android
==========
Android (www.android.com) is an open source operating system for mobile devices.
This document describes configurations needed to run the Android framework on
top of the Linux kernel.
To see a working defconfig look at msm_defconfig or goldfish_defconfig
which can be found at http://android.git.kernel.org in kernel/common.git
and kernel/msm.git
1.1 Required enabled config options
-----------------------------------
After building a standard defconfig, ensure that these options are enabled in
your .config or defconfig if they are not already. Based off the msm_defconfig.
You should keep the rest of the default options enabled in the defconfig
unless you know what you are doing.
ANDROID_PARANOID_NETWORK
ASHMEM
CONFIG_FB_MODE_HELPERS
CONFIG_FONT_8x16
CONFIG_FONT_8x8
CONFIG_YAFFS_SHORT_NAMES_IN_RAM
DAB
EARLYSUSPEND
FB
FB_CFB_COPYAREA
FB_CFB_FILLRECT
FB_CFB_IMAGEBLIT
FB_DEFERRED_IO
FB_TILEBLITTING
HIGH_RES_TIMERS
INOTIFY
INOTIFY_USER
INPUT_EVDEV
INPUT_GPIO
INPUT_MISC
LEDS_CLASS
LEDS_GPIO
LOCK_KERNEL
LkOGGER
LOW_MEMORY_KILLER
MISC_DEVICES
NEW_LEDS
NO_HZ
POWER_SUPPLY
PREEMPT
RAMFS
RTC_CLASS
RTC_LIB
SWITCH
SWITCH_GPIO
TMPFS
UID_STAT
UID16
USB_FUNCTION
USB_FUNCTION_ADB
USER_WAKELOCK
VIDEO_OUTPUT_CONTROL
WAKELOCK
YAFFS_AUTO_YAFFS2
YAFFS_FS
YAFFS_YAFFS1
YAFFS_YAFFS2
1.2 Required disabled config options
------------------------------------
CONFIG_YAFFS_DISABLE_LAZY_LOAD
DNOTIFY
1.3 Recommended enabled config options
------------------------------
ANDROID_PMEM
PSTORE_CONSOLE
PSTORE_RAM
SCHEDSTATS
DEBUG_PREEMPT
DEBUG_MUTEXES
DEBUG_SPINLOCK_SLEEP
DEBUG_INFO
FRAME_POINTER
CPU_FREQ
CPU_FREQ_TABLE
CPU_FREQ_DEFAULT_GOV_ONDEMAND
CPU_FREQ_GOV_ONDEMAND
CRC_CCITT
EMBEDDED
INPUT_TOUCHSCREEN
I2C
I2C_BOARDINFO
LOG_BUF_SHIFT=17
SERIAL_CORE
SERIAL_CORE_CONSOLE
2. Contact
==========
website: http://android.git.kernel.org
mailing-lists: android-kernel@googlegroups.com
......@@ -598,6 +598,15 @@ is completely unused; @cgrp->parent is still valid. (Note - can also
be called for a newly-created cgroup if an error occurs after this
subsystem's create() method has been called for the new cgroup).
int allow_attach(struct cgroup *cgrp, struct cgroup_taskset *tset)
(cgroup_mutex held by caller)
Called prior to moving a task into a cgroup; if the subsystem
returns an error, this will abort the attach operation. Used
to extend the permission checks - if all subsystems in a cgroup
return 0, the attach will be allowed to proceed, even if the
default permission check (root or same user) fails.
int can_attach(struct cgroup *cgrp, struct cgroup_taskset *tset)
(cgroup_mutex held by caller)
......
......@@ -28,6 +28,7 @@ Contents:
2.3 Userspace
2.4 Ondemand
2.5 Conservative
2.6 Interactive
3. The Governor Interface in the CPUfreq Core
......@@ -218,6 +219,90 @@ a decision on when to decrease the frequency while running in any
speed. Load for frequency increase is still evaluated every
sampling rate.
2.6 Interactive
---------------
The CPUfreq governor "interactive" is designed for latency-sensitive,
interactive workloads. This governor sets the CPU speed depending on
usage, similar to "ondemand" and "conservative" governors, but with a
different set of configurable behaviors.
The tuneable values for this governor are:
target_loads: CPU load values used to adjust speed to influence the
current CPU load toward that value. In general, the lower the target
load, the more often the governor will raise CPU speeds to bring load
below the target. The format is a single target load, optionally
followed by pairs of CPU speeds and CPU loads to target at or above
those speeds. Colons can be used between the speeds and associated
target loads for readability. For example:
85 1000000:90 1700000:99
targets CPU load 85% below speed 1GHz, 90% at or above 1GHz, until
1.7GHz and above, at which load 99% is targeted. If speeds are
specified these must appear in ascending order. Higher target load
values are typically specified for higher speeds, that is, target load
values also usually appear in an ascending order. The default is
target load 90% for all speeds.
min_sample_time: The minimum amount of time to spend at the current
frequency before ramping down. Default is 80000 uS.
hispeed_freq: An intermediate "hi speed" at which to initially ramp
when CPU load hits the value specified in go_hispeed_load. If load
stays high for the amount of time specified in above_hispeed_delay,
then speed may be bumped higher. Default is the maximum speed
allowed by the policy at governor initialization time.
go_hispeed_load: The CPU load at which to ramp to hispeed_freq.
Default is 99%.
above_hispeed_delay: When speed is at or above hispeed_freq, wait for
this long before raising speed in response to continued high load.
The format is a single delay value, optionally followed by pairs of
CPU speeds and the delay to use at or above those speeds. Colons can
be used between the speeds and associated delays for readability. For
example:
80000 1300000:200000 1500000:40000
uses delay 80000 uS until CPU speed 1.3 GHz, at which speed delay
200000 uS is used until speed 1.5 GHz, at which speed (and above)
delay 40000 uS is used. If speeds are specified these must appear in
ascending order. Default is 20000 uS.
timer_rate: Sample rate for reevaluating CPU load when the CPU is not
idle. A deferrable timer is used, such that the CPU will not be woken
from idle to service this timer until something else needs to run.
(The maximum time to allow deferring this timer when not running at
minimum speed is configurable via timer_slack.) Default is 20000 uS.
timer_slack: Maximum additional time to defer handling the governor
sampling timer beyond timer_rate when running at speeds above the
minimum. For platforms that consume additional power at idle when
CPUs are running at speeds greater than minimum, this places an upper
bound on how long the timer will be deferred prior to re-evaluating
load and dropping speed. For example, if timer_rate is 20000uS and
timer_slack is 10000uS then timers will be deferred for up to 30msec
when not at lowest speed. A value of -1 means defer timers
indefinitely at all speeds. Default is 80000 uS.
boost: If non-zero, immediately boost speed of all CPUs to at least
hispeed_freq until zero is written to this attribute. If zero, allow
CPU speeds to drop below hispeed_freq according to load as usual.
Default is zero.
boostpulse: On each write, immediately boost speed of all CPUs to
hispeed_freq for at least the period of time specified by