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2019-02-28notes: initrd: add information about /init and /dev/consoleJohn Ogness
Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-28notes: uio.txtJohn Ogness
This text document goes through examples of how to use the uio_pdrv_genirq driver for UIO drivers. It covers the device tree entries for various scenarios as well as userspace code using libuio to access/map the devices. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-28notes: initrd.txt: add information about initrd vs initramfsJohn Ogness
There are some big differences between initrd and initramfs. This text document lists them and the advantages/disadvantages. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-28HOWTO-uboot-qemu: add a quickstart referenceJohn Ogness
The knowledge base article does a much better job of explaining this, but sometimes we just want a quick script to get things going. This HOWTO is actually a script that goes from u-boot source to running u-boot in qemu. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-28kernel-debugging: lots of minor fixups discovered during trainingJohn Ogness
- update dynamic printk format - update addr2line for kernels by using script - update qemu lines for vexpress - add note about kaslr with qemu gdbserver - use uart0 for console and uart1 for kgdb - use 127.0.0.1 instead of localhost (otherwise qemu and gdb get confused about IPv4 or IPv6) Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-28linux-mm-basics: show the ulimit -s helpJohn Ogness
The stack size is also an important parameter for memory. Show it as well. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-28embedded-devel: remove unnecessary "cut" in commandJohn Ogness
The -dM argument shows the built-in macros. Cutting the #define from the output not only make the command unnecessarily complex, but also works against illustrating that they are macros. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-28linux-processes: also mention clone() syscallJohn Ogness
Since these days fork() is just a wrapper for the clone() syscall, it makes sense to at least mention it on the slide. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-28lx-trainer-vm: add kernel debugging symbolsJohn Ogness
This is useful when demonstrating crash kernels with the Debian kernel. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-28lx-trainer-vm: add required preseeding for jackd2John Ogness
When installing jackd2, it is required that the user choose if realtime options are allowed. Say "yes" in the preseeding. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-28app/debugging: add address sanitizer exampleKurt Kanzenbach
The address sanitizer is a useful tool for debugging lots of memory related bugs such as heap/stack overflows, user after frees and much more. Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
2019-02-28app/debugging: remove trailing whitespacesKurt Kanzenbach
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
2019-02-28kernel/tracing: removed double named section tracersKurt Kanzenbach
There are two sections named tracers. Probably a copy and paste error. Fix it. Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
2019-02-26rt-tests: test your idle system as wellKurt Kanzenbach
Reason: An Idle system may make use of power management features and introduce large latencies. This should be also tested. Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
2019-02-26rt-basics: translate german word in english presJohn Ogness
Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-26fastboot: add kconfig option for presJohn Ogness
Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-25lx-trainer-vm: add debconf-utilsJohn Ogness
It is nice to have debconf-get-selections so that the preseeding values can be investigated. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-25lx-trainer-vm: install lots of new packagesJohn Ogness
(helps for a comfortable vmware experience) open-vm-tools-desktop (requested from training participants) vim-gtk3 terminator iotop bash-completion (compression tools for building LZ4-compressed kernel/initramfs) liblz4-tool (realtime stress testing) stress-ng (fastboot tool) prelink (tool for devel/debugging) clang (packages for building new kernelshark) tig cmake libjson-c-dev freeglut3-dev libxmu-dev libxi-dev Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-25fastboot: add english translated fastboot slidesJohn Ogness
The german slides are still there but they will not get built. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-25boot-process-basics: fix various typos from translationJohn Ogness
Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-18fastboot: add (german) fastboot slidesJohn Ogness
Taken from Jan's 2010 talk. These need to be converted to english! Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-18boot-process-basics: translate to englishJohn Ogness
The german version file is still there but it will no longer be built by the Makefile. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-15lx-trainer-vm: add manpages from stretch-backportsJohn Ogness
With commit 80aaf492("lx-trainer-vm: take manpages from stretch-backports"), elbe was no longer able to build the rootfs because manpages-dev also requires manpages from backports. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-15lx-trainer-vm: add graphvizJohn Ogness
This has the "dot" tool for visualizing systemd boot stats. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-15linux/processes: add description of why the "cat"John Ogness
Since the "cat" part isn't really about setting, also mention that we are verifying. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-15linux/processes: fix maxcpus kernel parameter and irq affitinityKurt Kanzenbach
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de> [jogness: fixed up to show both set and check of affinity] Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-15schulung_tools: drivers: remove modules subdirJohn Ogness
There is no need for the extra directory level. Move all the example modules to the parent "drivers" directory and delete the modules directory. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-15schulung_tools: hellodriver: relocate and minimize kernel build patchJohn Ogness
There is no reason the the kernel build patch needs to duplicate the entire hello driver. Just show the parts relating to kbuild integration. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-15schulung_tools: hellodriver: add patches for use with ledsJohn Ogness
These patches are based heavily on the work by Manu to make the driver lessons more interesting. Rather than create a new driver, I took his work and created a series of patches that do interesting modifications to the hello driver. These patches can be used together with the "leds" program to do live blinking demonstrations. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-15schulung_tools: hellodriver: update patch-add-sysfsJohn Ogness
Since hello.c changed, the patch for adding custom sysfs files needed to be updated. While at it, make the patch into a form that can be used with "git am". Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-15schulung_tools: hellodriver: cleanup codeJohn Ogness
- add SPDX license identifier - cleanup goto target names - remove an obsolete setting of owner to THIS_MODULE - update the module version Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-15schulung_tools: hellodriver: set to find Debian kernel buildJohn Ogness
The default build directory needed manual adjustment when the driver was to be built. Change it to use the Debian build path so this driver can be built immediately for the native Debian system without any changes. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-15schulung_tools: leds: add Qt leds application for hostJohn Ogness
The leds application runs on the host and is used to simulate PCI hardware with 3 LEDs. See the README for information about how to build and use it. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-14schulung_tools: matrix: add instructions counterJohn Ogness
The amount of instructions should be the same regardless what method you use (1 or 2) but the cache misses will be very different. Looking at these statistics side by side clearly illustrate the problem. Update the README to also include the instruction count. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-07fix various typos and wrong commands in slidesHolger Dengler
Fixes for: - missing variable definition in Makefile - wrong serial device in kernel parameters - missing trace-cmd subcmd and wrong parameter (sched_switch is an event, not a plugin) - missing #include in example code - fix copy&paste leftover Signed-off-by: Holger Dengler <dengler@linutronix.de> Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de>
2019-02-01ipc_tcp: fix output message in senderJohn Ogness
Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-01ipc_tcp: add tcpdump commands to READMEJohn Ogness
Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-01ipc_tcp: add new ipc example using loopback socketsJohn Ogness
This demo should (hopefully serve) as a basis for overlaying pcap and ftrace data within trace compass. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-01lx-trainer-vm: take manpages from stretch-backportsJohn Ogness
We want pthread_mutex_consistent, which is not in stretch. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-01dd-multi.sh: add sleep for caution, copy vmdk in parallelJohn Ogness
After calling partprobe, userspace may need a moment to delete any previously existing device nodes. Sleep a second to give userspace a chance to do this before checking for the nodes to appear. Also, copy the vmdk files in parallel. Otherwise it takes forever to setup the USB disks. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-02-01lx-trainer-vm: add qtbase5-devJohn Ogness
The qt5 base dev files allow building of the ivshmem software device. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-01-31filesystems: change recommendations for sd-cardsJohn Ogness
ext2 is recommended for flash-based block devices? Why?! I have changed it to F2FS and EXT4. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-01-31add klist slidesManuel Traut
very basic version of slides for kernel lists Signed-off-by: Manuel Traut <manut@linutronix.de>
2019-01-29rt-basics: use more descriptive prio-inheritance imagesJohn Ogness
Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-01-28dd-multi: create vmdk partition instead of /home paritionJohn Ogness
As of 6f5bc54("lx-trainer-vm: increase image size to 64GiB") the root filesystem is now large enough for all layers and training work. So there is no reason to create a separate /home partition. Change the dd-multi.sh script to instead: - create an exfat partition - convert the image to VMDK format and copy to exfat partition This allows participants who cannot boot from USB to be able to use VMware or VirtualBox during the training. They need only to create a virtual machine and set the "training-hd.vmdk" file as the hard drive. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-01-28dd-multi: rename HOMEPT to EXTRAPTJohn Ogness
Rename the variable representing the extra partition. Until now this was /home but it will be changed to be an extra partition. Signed-off-by: John Ogness <john.ogness@linutronix.de>
2019-01-28profiling - gprof: use no PIE compiler and linker optionManuel Traut
PIE is enabled in the gcc of Debian/stretch by default. However the gprof in stretch isn't able to produce any output if PIE is enabled. This is also documented here: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=854704 Disable PIE for the moment to get some gprof output. However i'm not able to find out how to disable PIE if compiling and linking is done in two steps. Therefore this is just removed. Signed-off-by: Manuel Traut <manut@linutronix.de>
2019-01-28schulung_tools/notes add some kernel notesManuel Traut
they should be converted to a 'Kernel API' slideset. Signed-off-by: Manuel Traut <manut@linutronix.de>
2019-01-28schulung_tools: add klist kernel moduleManuel Traut
this module can be used to show the usage of klist Signed-off-by: Manuel Traut <manut@linutronix.de>
2019-01-28Device Tree: initial versionManuel Traut
This is the initial version of a Device Tree Presentation. The Presentation includes Background, Scope and Advantages of Device Tree usage as well as a short explanation of the Syntax and Usage. It ends with information about current developments and references to further information. Also an excercise for the attendees is defined. Signed-off-by: Manuel Traut <manut@linutronix.de>
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