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dm-linear

jrj317 — Sun, 10 Apr 2011 00:16:34 +0000

dm-linear ========= Device-Mapper's "linear" target maps a linear range of the Device-Mapper device onto a linear range of another device. This is the basic building block of logical volume managers. Parameters: : Full pathnam ...

kcopyd

jrj317 — Sun, 10 Apr 2011 00:15:09 +0000

kcopyd ====== Kcopyd provides the ability to copy a range of sectors from one block-device to one or more other block-devices, with an asynchronous completion notification. It is used by dm-snapshot and dm-mirror. Users of kcopyd must first create a client and indicate how many memory pages t ...

KERNEL THREADS

jrj317 — Sun, 10 Apr 2011 00:11:01 +0000

KERNEL THREADS Freezer Upon entering a suspended state the system will freeze all tasks. This is done by delivering pseudosignals. This affects kernel threads, too. To successfully freeze a kernel thread the thread has to check for the pseudosignal and enter the refrigerator. Code to do this ...

Power Management Interface

jrj317 — Sun, 10 Apr 2011 00:09:56 +0000

Power Management Interface The power management subsystem provides a unified sysfs interface to userspace, regardless of what architecture or platform one is running. The interface exists in /sys/power/ directory (assuming sysfs is mounted at /sys). /sys/power/state controls system power s ...

System Power Management States

jrj317 — Sun, 10 Apr 2011 00:08:15 +0000

System Power Management States The kernel supports three power management states generically, though each is dependent on platform support code to implement the low-level details for each state. This file describes each state, what they are commonly called, what ACPI state they map to, and wha ...

swsusp/S3 tricks

jrj317 — Sun, 10 Apr 2011 00:07:18 +0000

swsusp/S3 tricks ~~~~~~~~~~~~~~~~ Pavel Machek < pavel@suse.cz > If you want to trick swsusp/S3 into working, you might want to try: * go with minimal config, turn off drivers like USB, AGP you don't really need * turn off APIC and preempt * use ext2. At least it ...

Device Power Management

jrj317 — Sun, 10 Apr 2011 00:06:17 +0000

Device Power Management Device power management encompasses two areas - the ability to save state and transition a device to a low-power state when the system is entering a low-power state; and the ability to transition a device to a low-power state while the system is running (and independent ...

Platform Devices and Drivers

jrj317 — Sun, 10 Apr 2011 00:04:59 +0000

Platform Devices and Drivers ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Platform devices ~~~~~~~~~~~~~~~~ Platform devices are devices that typically appear as autonomous entities in the system. This includes legacy port-based devices and host bridges to peripheral buses. Platform drivers ~~~~~~~~~~~~~~~ ...

Bus Types

jrj317 — Sun, 10 Apr 2011 00:03:53 +0000

Bus Types Definition ~~~~~~~~~~ struct bus_type { char * name; struct subsystem subsys; struct kset drivers; struct kset devices; struct bus_attribute * bus_attrs; struct device_attribute * dev_a ...

Device Classes

jrj317 — Sun, 10 Apr 2011 00:02:55 +0000

Device Classes Introduction ~~~~~~~~~~~~ A device class describes a type of device, like an audio or network device. The following device classes have been identified: Each device class defines a set of semantics and a programming interface that ...

The Basic Device Structure

jrj317 — Sun, 10 Apr 2011 00:01:54 +0000

The Basic Device Structure ~~~~~~~~~~~~~~~~~~~~~~~~~~ struct device { struct list_head g_list; struct list_head node; struct list_head bus_list; &nb ...

Device Drivers

jrj317 — Sat, 09 Apr 2011 23:59:52 +0000

Device Drivers struct device_driver { char * name; struct bus_type ...

Device Interfaces

jrj317 — Sat, 09 Apr 2011 23:58:53 +0000

Device Interfaces Introduction ~~~~~~~~~~~~ Device interfaces are the logical interfaces of device classes that correlate directly to userspace interfaces, like device nodes. Each device class may have multiple interfaces through which you can access the same device. An input ...

Ext3 Filesystem

jrj317 — Sat, 09 Apr 2011 23:56:35 +0000

Ext3 Filesystem =============== ext3 was originally released in September 1999. Written by Stephen Tweedie for 2.2 branch, and ported to 2.4 kernels by Peter Braam, Andreas Dilger, Andrew Morton, Alexander Viro, Ted Ts'o and Stephen Tweedie. ext3 is ext2 filesystem enhanced with journalling ...

The Second Extended Filesystem

jrj317 — Sat, 09 Apr 2011 23:54:58 +0000

The Second Extended Filesystem ============================== ext2 was originally released in January 1993. Written by R\'emy Card, Theodore Ts'o and Stephen Tweedie, it was a major rewrite of the Extended Filesystem. It is currently still (April 2001) the predominant filesystem in ...

Overview of Amiga Filesystems

jrj317 — Sat, 09 Apr 2011 23:53:42 +0000

Overview of Amiga Filesystems ============================= Not all varieties of the Amiga filesystems are supported for reading and writing. The Amiga currently knows six different filesystems: DOS\0 The old or original filesystem, not really suited for hard disks and ...

ROMFS - ROM FILE SYSTEM

jrj317 — Sat, 09 Apr 2011 23:52:24 +0000

ROMFS - ROM FILE SYSTEM This is a quite dumb, read only filesystem, mainly for initial RAM disks of installation disks. It has grown up by the need of having modules linked at boot time. Using this filesystem, you get a very similar feature, and even the possibility of a small kernel ...

S3C24XX Suspend Support

jrj317 — Sat, 09 Apr 2011 23:50:08 +0000

S3C24XX Suspend Support ======================= Introduction ------------ The S3C2410 supports a low-power suspend mode, where the SDRAM is kept in Self-Refresh mode, and all but the essential peripheral blocks are powered down. For mo ...

S3C24XX ARM Linux Overview

jrj317 — Sat, 09 Apr 2011 23:48:40 +0000

S3C24XX ARM Linux Overview ========================== Introduction ------------ The Samsung S3C24XX range of ARM9 System-on-Chip CPUs are supported by the 's3c2410' architecture of ARM Linux. Currently the S3C2410 and the S3C2 ...

S3C2410 GPIO Control

jrj317 — Sat, 09 Apr 2011 23:47:18 +0000

S3C2410 GPIO Control ==================== Introduction ------------ The s3c2410 kernel provides an interface to configure and manipulate the state of the GPIO pins, and find out other information about them. There are a number ...

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