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r: 333017
b: refs/heads/master
c: 593e909
h: refs/heads/master
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  333015: 84b6efe
v: v3
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Andy Grover authored and Nicholas Bellinger committed Sep 17, 2012
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2 changes: 1 addition & 1 deletion [refs]
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---
refs/heads/master: e1b28147f684af67bfac989756c27c19859d3d4e
refs/heads/master: 593e909166c884077b0f56274a97a8e90a0926af
2 changes: 2 additions & 0 deletions trunk/Documentation/00-INDEX
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Expand Up @@ -270,6 +270,8 @@ preempt-locking.txt
- info on locking under a preemptive kernel.
printk-formats.txt
- how to get printk format specifiers right
prio_tree.txt
- info on radix-priority-search-tree use for indexing vmas.
ramoops.txt
- documentation of the ramoops oops/panic logging module.
rbtree.txt
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22 changes: 22 additions & 0 deletions trunk/Documentation/ABI/obsolete/proc-pid-oom_adj
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What: /proc/<pid>/oom_adj
When: August 2012
Why: /proc/<pid>/oom_adj allows userspace to influence the oom killer's
badness heuristic used to determine which task to kill when the kernel
is out of memory.

The badness heuristic has since been rewritten since the introduction of
this tunable such that its meaning is deprecated. The value was
implemented as a bitshift on a score generated by the badness()
function that did not have any precise units of measure. With the
rewrite, the score is given as a proportion of available memory to the
task allocating pages, so using a bitshift which grows the score
exponentially is, thus, impossible to tune with fine granularity.

A much more powerful interface, /proc/<pid>/oom_score_adj, was
introduced with the oom killer rewrite that allows users to increase or
decrease the badness score linearly. This interface will replace
/proc/<pid>/oom_adj.

A warning will be emitted to the kernel log if an application uses this
deprecated interface. After it is printed once, future warnings will be
suppressed until the kernel is rebooted.
25 changes: 4 additions & 21 deletions trunk/Documentation/ABI/testing/ima_policy
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Expand Up @@ -12,65 +12,48 @@ Description:
then closing the file. The new policy takes effect after
the file ima/policy is closed.

IMA appraisal, if configured, uses these file measurements
for local measurement appraisal.

rule format: action [condition ...]

action: measure | dont_measure | appraise | dont_appraise | audit
action: measure | dont_measure
condition:= base | lsm
base: [[func=] [mask=] [fsmagic=] [uid=] [fowner]]
base: [[func=] [mask=] [fsmagic=] [uid=]]
lsm: [[subj_user=] [subj_role=] [subj_type=]
[obj_user=] [obj_role=] [obj_type=]]

base: func:= [BPRM_CHECK][FILE_MMAP][FILE_CHECK]
mask:= [MAY_READ] [MAY_WRITE] [MAY_APPEND] [MAY_EXEC]
fsmagic:= hex value
uid:= decimal value
fowner:=decimal value
lsm: are LSM specific

default policy:
# PROC_SUPER_MAGIC
dont_measure fsmagic=0x9fa0
dont_appraise fsmagic=0x9fa0
# SYSFS_MAGIC
dont_measure fsmagic=0x62656572
dont_appraise fsmagic=0x62656572
# DEBUGFS_MAGIC
dont_measure fsmagic=0x64626720
dont_appraise fsmagic=0x64626720
# TMPFS_MAGIC
dont_measure fsmagic=0x01021994
dont_appraise fsmagic=0x01021994
# RAMFS_MAGIC
dont_measure fsmagic=0x858458f6
dont_appraise fsmagic=0x858458f6
# SECURITYFS_MAGIC
dont_measure fsmagic=0x73636673
dont_appraise fsmagic=0x73636673

measure func=BPRM_CHECK
measure func=FILE_MMAP mask=MAY_EXEC
measure func=FILE_CHECK mask=MAY_READ uid=0
appraise fowner=0

The default policy measures all executables in bprm_check,
all files mmapped executable in file_mmap, and all files
open for read by root in do_filp_open. The default appraisal
policy appraises all files owned by root.
open for read by root in do_filp_open.

Examples of LSM specific definitions:

SELinux:
# SELINUX_MAGIC
dont_measure fsmagic=0xf97cff8c
dont_appraise fsmagic=0xf97cff8c
dont_measure fsmagic=0xF97CFF8C

dont_measure obj_type=var_log_t
dont_appraise obj_type=var_log_t
dont_measure obj_type=auditd_log_t
dont_appraise obj_type=auditd_log_t
measure subj_user=system_u func=FILE_CHECK mask=MAY_READ
measure subj_role=system_r func=FILE_CHECK mask=MAY_READ

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18 changes: 6 additions & 12 deletions trunk/Documentation/ABI/testing/sysfs-bus-rbd
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Expand Up @@ -25,10 +25,6 @@ client_id

The ceph unique client id that was assigned for this specific session.

features

A hexadecimal encoding of the feature bits for this image.

major

The block device major number.
Expand All @@ -37,11 +33,6 @@ name

The name of the rbd image.

image_id

The unique id for the rbd image. (For rbd image format 1
this is empty.)

pool

The name of the storage pool where this rbd image resides.
Expand All @@ -66,6 +57,12 @@ current_snap

The current snapshot for which the device is mapped.

create_snap

Create a snapshot:

$ echo <snap-name> > /sys/bus/rbd/devices/<dev-id>/snap_create

snap_*

A directory per each snapshot
Expand All @@ -82,7 +79,4 @@ snap_size

The size of the image when this snapshot was taken.

snap_features

A hexadecimal encoding of the feature bits for this snapshot.

7 changes: 0 additions & 7 deletions trunk/Documentation/ABI/testing/sysfs-bus-usb
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Expand Up @@ -220,10 +220,3 @@ Description:
If the device doesn't support LTM, the file will read "no".
The file will be present for all speeds of USB devices, and will
always read "no" for USB 1.1 and USB 2.0 devices.

What: /sys/bus/usb/devices/.../(hub interface)/portX
Date: August 2012
Contact: Lan Tianyu <tianyu.lan@intel.com>
Description:
The /sys/bus/usb/devices/.../(hub interface)/portX
is usb port device's sysfs directory.
22 changes: 11 additions & 11 deletions trunk/Documentation/ABI/testing/sysfs-class-extcon
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Expand Up @@ -13,7 +13,7 @@ Description:
accessory cables have such capability. For example,
the 30-pin port of Nuri board (/arch/arm/mach-exynos)
may have both HDMI and Charger attached, or analog audio,
video, and USB cables attached simultaneously.
video, and USB cables attached simulteneously.

If there are cables mutually exclusive with each other,
such binary relations may be expressed with extcon_dev's
Expand All @@ -35,7 +35,7 @@ Description:
The /sys/class/extcon/.../state shows and stores the cable
attach/detach information of the corresponding extcon object.
If the extcon object has an optional callback "show_state"
defined, the showing function is overridden with the optional
defined, the showing function is overriden with the optional
callback.

If the default callback for showing function is used, the
Expand All @@ -46,19 +46,19 @@ Description:
TA=1
EAR_JACK=0
#
In this example, the extcon device has USB_OTG and TA
In this example, the extcon device have USB_OTG and TA
cables attached and HDMI and EAR_JACK cables detached.

In order to update the state of an extcon device, enter a hex
state number starting with 0x:
# echo 0xHEX > state
state number starting with 0x.
echo 0xHEX > state

This updates the whole state of the extcon device.
This updates the whole state of the extcon dev.
Inputs of all the methods are required to meet the
mutually_exclusive conditions if they exist.
mutually_exclusive contidions if they exist.

It is recommended to use this "global" state interface if
you need to set the value atomically. The later state
you need to enter the value atomically. The later state
interface associated with each cable cannot update
multiple cable states of an extcon device simultaneously.

Expand All @@ -73,7 +73,7 @@ What: /sys/class/extcon/.../cable.x/state
Date: February 2012
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
Description:
The /sys/class/extcon/.../cable.x/state shows and stores the
The /sys/class/extcon/.../cable.x/name shows and stores the
state of cable "x" (integer between 0 and 31) of an extcon
device. The state value is either 0 (detached) or 1
(attached).
Expand All @@ -83,8 +83,8 @@ Date: December 2011
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
Description:
Shows the relations of mutually exclusiveness. For example,
if the mutually_exclusive array of extcon device is
{0x3, 0x5, 0xC, 0x0}, then the output is:
if the mutually_exclusive array of extcon_dev is
{0x3, 0x5, 0xC, 0x0}, the, the output is:
# ls mutually_exclusive/
0x3
0x5
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21 changes: 0 additions & 21 deletions trunk/Documentation/ABI/testing/sysfs-class-regulator
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Expand Up @@ -349,24 +349,3 @@ Description:

This will be one of the same strings reported by
the "state" attribute.

What: /sys/class/regulator/.../bypass
Date: September 2012
KernelVersion: 3.7
Contact: Mark Brown <broonie@opensource.wolfsonmicro.com>
Description:
Some regulator directories will contain a field called
bypass. This indicates if the device is in bypass mode.

This will be one of the following strings:

'enabled'
'disabled'
'unknown'

'enabled' means the regulator is in bypass mode.

'disabled' means that the regulator is regulating.

'unknown' means software cannot determine the state, or
the reported state is invalid.
17 changes: 0 additions & 17 deletions trunk/Documentation/ABI/testing/sysfs-devices-firmware_node
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11 changes: 0 additions & 11 deletions trunk/Documentation/ABI/testing/sysfs-devices-system-cpu
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Expand Up @@ -176,14 +176,3 @@ Description: Disable L3 cache indices
All AMD processors with L3 caches provide this functionality.
For details, see BKDGs at
http://developer.amd.com/documentation/guides/Pages/default.aspx


What: /sys/devices/system/cpu/cpufreq/boost
Date: August 2012
Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
Description: Processor frequency boosting control

This switch controls the boost setting for the whole system.
Boosting allows the CPU and the firmware to run at a frequency
beyound it's nominal limit.
More details can be found in Documentation/cpu-freq/boost.txt
70 changes: 0 additions & 70 deletions trunk/Documentation/ABI/testing/sysfs-driver-ppi
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13 changes: 0 additions & 13 deletions trunk/Documentation/ABI/testing/sysfs-driver-wacom
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WWhat: /sys/class/hidraw/hidraw*/device/oled*_img
Date: June 2012
Contact: linux-bluetooth@vger.kernel.org
Description:
The /sys/class/hidraw/hidraw*/device/oled*_img files control
OLED mocro displays on Intuos4 Wireless tablet. Accepted image
has to contain 256 bytes (64x32 px 1 bit colour). The format
is the same as PBM image 62x32px without header (64 bits per
horizontal line, 32 lines). An example of setting OLED No. 0:
dd bs=256 count=1 if=img_file of=[path to oled0_img]/oled0_img
The attribute is read only and no local copy of the image is
stored.

What: /sys/class/hidraw/hidraw*/device/speed
Date: April 2010
Kernel Version: 2.6.35
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13 changes: 0 additions & 13 deletions trunk/Documentation/ABI/testing/sysfs-fs-ext4
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Expand Up @@ -96,16 +96,3 @@ Contact: "Theodore Ts'o" <tytso@mit.edu>
Description:
The maximum number of megabytes the writeback code will
try to write out before move on to another inode.

What: /sys/fs/ext4/<disk>/extent_max_zeroout_kb
Date: August 2012
Contact: "Theodore Ts'o" <tytso@mit.edu>
Description:
The maximum number of kilobytes which will be zeroed
out in preference to creating a new uninitialized
extent when manipulating an inode's extent tree. Note
that using a larger value will increase the
variability of time necessary to complete a random
write operation (since a 4k random write might turn
into a much larger write due to the zeroout
operation).
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