path: root/index.txt

Linux Kernelprogrammierung

Linuxtag:
=========
Mi 11. - Sa 14. Mai Messe Berlin - Vorlesung entfällt

Excursion from 11th to 15th of May.
Conference Schedule online

Costs:
Hotel:  about 30 EUR / night = 120 EUR
Train:  150 .. 200 EUR
Ticket: 16 EUR (four day ticket), LinuxNacht 38 EUR (incl. Drinks and Meals)

~300 EUR - grant from University

Plesae mail me until Monday if you want to join. (manut@mecka.net)

I try to get there as cheap as possible, however I cannot say, how much the trip
will cost. You can include a constraints in your mail, e.g. maximum costs. ;-)

weitere Termine:
================
11. - 14. April Exkursionswoche??


LWN - summary:
==============

01.04.2011:
^^^^^^^^^^^

- GCC 4.6.0 is out  support for the Go language, improved C++0x support, many
		optimization improvements including a "scalable whole program optimizer"
		which is said to be stable enough to use, a new -Ofast option, and more..

- 2.6.39-rc1 is out

There have been just over 2,200 non-merge changesets pulled into the mainline
since last week; that makes 8,757 total changes for this development cycle.

- an option to force all interrupt handlers to run as threads

- The media controller subsystem

- The CHOKe packet scheduler

- There is a new "mtdswap" block device which allows swapping directly to
		memory technology devices.

- printk() and friends have a new "%pB" format specifier which prints a
		backtrace symbol and its offset.

- Jump Label reworked

    #include <linux/jump_label.h>

    struct jump_label_key my_key;
Enabling and disabling the key is a simple matter of calling:

    jump_label_inc(struct jump_label_key *key);
    jump_label_dec(struct jump_label_key *key);
And using the key to control the execution of rarely-needed code becomes:

    if (static_branch(&my_key)) {
	/* Unlikely stuff happens here */
    }

The 2.6.39 kernel now goes into the stabilization phase of the development
cycle. If the usual pattern holds, we can expect to see on the order of 2000
fixes merged between now and the final release, which is likely to happen in
early June.


Quotes of the week

The C preprocessor... It is ugly, inelegant, painful, annoying, and should have
been strangled at birth -- but it is always there when you need it!
-- Paul McKenney

Make Linux Software presents the fastest ever embedded Linux boot for 720 MHz
ARM and NAND flash memory. Linux boot time is 300 milliseconds from boot loader
to shell.
-- Constantine Shulyupin



25.03.2011:
^^^^^^^^^^^

- As always lots of new drivers :))

Processors and systems: VIA/WonderMedia VT8500/WM85xx System-on-Chips,
IMX27 IPCAM boards, and MX51 Genesi Efika Smartbook systems.

Block: Broadcom NetXtreme II FCoE controllers and
Freescale MXS Multimedia Card interfaces.

Graphics: Intel GMA500 controllers (2D acceleration only),
USB-connected graphics devices, MXS LCD framebuffer devices,
and LD9040 AMOLED panels.

Input: Hyper-V virtualized mice, Roccat Kova[+] mouse devices,
Roccat Arvo keyboards, Wolfson WM831x PMIC touchscreen controllers,
Atmel AT42QT1070 touch sensor chips, and
Texas Instruments TSC2005 touchscreen controllers.

Networking: Texas Instruments WiLink7 bluetooth controllers (from staging),
Bosch C_CAN controllers, Faraday FTMAC100 10/100 Ethernet controllers,
and the Xen "netback" back-end driver.

Miscellaneous: Faraday FUSB300 USB peripheral controllers,
OMAP USBHS host controllers, NVIDIA Tegra USB host controllers,
Texas Instruments PRUSS-connected devices, MSM UARTs,
Maxim MAX517/518/519 DACs, RealTek PCI-E card readers,
Analog Devices ad7606, ad7606-6, and ad7606-4 analog to digital converters,
Maxim MAX6639 temperature monitors, Maxim MAX8688, MAX16064, MAX34440 and
MAX34441 hardware monitoring chips,
Lineage compact power line power entry modules,
PMBus-compliant hardware monitoring devices,
Linear Technology LTC4151 is high voltage I2C current and voltage monitors,
Intel SCU watchdog devices, Ingenic jz4740 SoC hardware watchdogs,
Xen watchdog devices, NVIDIA Tegra internal I2C controllers,
Freescale i.MX28 I2C interfaces, MXS Application UART (AUART) ports,
SuperH SPI controllers, Altera SPI controllers, OpenCores tiny SPI controllers,
SMSC SCH5627 Super-I/O hardware monitoring chips,
Texas Instruments ADS1015 12-bit 4-input ADC devices,
Diolan U2C-12 USB adapters, SPEAr13XX PCIe controllers (in "gadget" mode),
and Freescale MXS-based SoC i.MX23/28 DMA engines.

Sound: Firewire-connected sound devices, Wolfson Micro WM8991 codecs,
Cirrus CS4271 codecs, Freescale SGTL5000 codecs, TI tlv320aic32x4 codecs,
Maxim MAX9850 codecs, and TerraTec 6fire DMX USB interfaces.

Outgoing: A number of TTY drivers
(epca, ip2, istallion, riscom8, serial167, specialix, stallion, generic_serial,
rio, ser_a2232, sx, and vme_scc) have been moved to the staging tree in
anticipation of removal in 2.6.41.

The smbfs and autofs3 filesystems, which were moved to staging in 2.6.37, have
now been moved out of the kernel entirely.

- BKL http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=4ba8216cd90560bc402f52076f64d8546e8aefcb

- New syscall: int syncfs(int fd);

- The USB core has gained support for USB 3.0 hubs

- New Dynamic Debugging Features

	tpm_nsc.c
	346: dev_dbg(&pdev->dev, "NSC TPM detected\n");

	echo file tpm_nsc.c line 346 +p > .../dynamic_debug/control
	echo file tpm_nsc.c line 346-373 +p > .../dynamic_debug/control
	echo file tpm_nsc.c function init_nsc +p > .../dynamic_debug/control

- new set of string-to-integer converters which is expected to be used in
		preference to all others.

		Unsigned conversions can be done with any of
		kstrtoull(), kstrtoul(), kstrtouint(), kstrtou64(), kstrtou32(),
		kstrtou16(), kstrtou8().

		Conversions to signed integers can be done with
		kstrtoll(), kstrtol(), kstrtoint(), kstrtos64(), kstrtos32(), kstrtos16(),
		or kstrtos8().

	All of these functions are marked __must_check, so callers are expected to
	check to ensure that the conversion happened successfully. The older
	functions are marked deprecated, and will eventually be removed. These new
	kstrto*() functions are now the Official Best Way To Convert Strings, so
	developers need wonder no longer.

Prüfung:
========
schriftlich, 60 Minuten

Material:
=========
http://manut.eu/hswgt

Script:
=======
Mitschriebe gerne an
manut@mecka.net

Literatur:
==========
http://lwn.net
http://heise.de/open <-- Kernel Log
http://kernelnewbies.org
http://beagleboard.org

Corbet, Rubini, Kroah-Hartmann: Linux Device Drivers 3rd Edition
  http://lwn.net/Kernel/LDD3

Kroah-Hartmann: Linux Kernel In A Nutshell
  http://www.kroah.com/lkn

Bovet, Cesati: Understanding The Linux Kernel (34,95)

Love: Linux Kernel Development (29,95 EUR)

Bewertung:
==========
http://www.meinprof.de/uni/prof/51131

Linuxtag:
=========
Mi 11. - Sa 14. Mai Messe Berlin - Vorlesung entfällt

weitere Termine:
================
11. - 14. April Exkursionswoche??
03. Juni Blutfreitag Vorlesung entfällt
17. Juni Pfingsten Vorlesung entfällt
01. Juli letzte Vorlesung

geplante Themen:
================

UE0 - what is linux:
--------------------
Linux Desktop vs. embedded Linux:
 - Kernel vs. Userspace
 - Fedora, Debian, ubuntu ..
 - Android
 - KDE / GNOME
 - CPU Architekturen
 - cross

UE1 - kernel basics, kernel best practices, kernel api:
-------------------------------------------------------
Kernelentwicklung
  - Mainline / Maintainer
  - syscalls (stabil)
  - interne API (instabil)
  Versionskontrolle:
    - diff / patch
    - quilt
    - git

UE2 - kernel build, bootloader:
-------------------------------
Board Bringup:
 - Bootloader
 - grub vs. IPL vs. u-boot

Kernel:
 - Kernel konfigurieren
 - Kernel kompilieren (auch cross)
 - Kernel Dokumentation

UE3:
----
Dateisysteme:
  Desktop:
  - ext2/3/4 - xfs
  Embedded:
  - jffs2 - ubifs
  Flash:
  - SDCard, CF vs. NAND
  Netzwerk:
  - NFS

UE4:
----
Userspace:
 - RFS generieren
 - busybox / cross
 - read only RFS
 - 'kein' RFS vs. full-featured Debian

UE5:
----
Kernelarchitektur:
  - Core
  - Driver
  - Arch
  - Coding Style

UE6:
----
Kernelmodule:
  - 1. Kernelmodul 'Hello world'
  registrieren bei Subsystemen:
  - char dev

UE7:
----
Tracing

UE8:
----
Kernelkonzepte:
  Review eines Treibers:
    - IRQ Handling
    - MM
    - Timer

UE9:
----
Echtzeit:
  - RTAI vs. RT_PREEMPT
  - Grenzen
  - cyclictest
 
UE10:
----
UIO:
  - UIO LPT Beispiel
  - RT Performance messen

UE11:
-----
MIDI:
  - Basics
  - Midi & Linux

UE12:
-----
IRQ Handling, Locking, ..

UE13:
-----
ALSA:
  - Kernel-/Userspace-Architektur
  - Tools
  - Synthesizer

UE14:
-----
Linux & Grafik oder ein anderes aktuelles Thema

UE15:
-----
Q&A tglx