This is a brief list of all the files in ./linux/Documentation and what they contain. If you add a documentation file, please list it here in alphabetical order as well, or risk being hunted down like a rabid dog. Please keep the descriptions small enough to fit on one line. Thanks -- Paul G. Following translations are available on the WWW: - Japanese, maintained by the JF Project (jf@listserv.linux.or.jp), at http://linuxjf.sourceforge.jp/ 00-INDEX - this file. ABI/ - info on kernel <-> userspace ABI and relative interface stability. CodingStyle - nothing here, just a pointer to process/coding-style.rst. DMA-API.txt - DMA API, pci_ API & extensions for non-consistent memory machines. DMA-API-HOWTO.txt - Dynamic DMA mapping Guide DMA-ISA-LPC.txt - How to do DMA with ISA (and LPC) devices. DMA-attributes.txt - listing of the various possible attributes a DMA region can have EDID/ - directory with info on customizing EDID for broken gfx/displays. IPMI.txt - info on Linux Intelligent Platform Management Interface (IPMI) Driver. IRQ-affinity.txt - how to select which CPU(s) handle which interrupt events on SMP. IRQ-domain.txt - info on interrupt numbering and setting up IRQ domains. IRQ.txt - description of what an IRQ is. Intel-IOMMU.txt - basic info on the Intel IOMMU virtualization support. Makefile - It's not of interest for those who aren't touching the build system. PCI/ - info related to PCI drivers. RCU/ - directory with info on RCU (read-copy update). SAK.txt - info on Secure Attention Keys. SM501.txt - Silicon Motion SM501 multimedia companion chip SubmittingPatches - nothing here, just a pointer to process/coding-style.rst. accounting/ - documentation on accounting and taskstats. acpi/ - info on ACPI-specific hooks in the kernel. admin-guide/ - info related to Linux users and system admins. aoe/ - description of AoE (ATA over Ethernet) along with config examples. arm/ - directory with info about Linux on the ARM architecture. arm64/ - directory with info about Linux on the 64 bit ARM architecture. auxdisplay/ - misc. LCD driver documentation (cfag12864b, ks0108). backlight/ - directory with info on controlling backlights in flat panel displays bcache.txt - Block-layer cache on fast SSDs to improve slow (raid) I/O performance. blackfin/ - directory with documentation for the Blackfin arch. block/ - info on the Block I/O (BIO) layer. blockdev/ - info on block devices & drivers bt8xxgpio.txt - info on how to modify a bt8xx video card for GPIO usage. btmrvl.txt - info on Marvell Bluetooth driver usage. bus-devices/ - directory with info on TI GPMC (General Purpose Memory Controller) bus-virt-phys-mapping.txt - how to access I/O mapped memory from within device drivers. cachetlb.txt - describes the cache/TLB flushing interfaces Linux uses. cdrom/ - directory with information on the CD-ROM drivers that Linux has. cgroup-v1/ - cgroups v1 features, including cpusets and memory controller. cgroup-v2.txt - cgroups v2 features, including cpusets and memory controller. circular-buffers.txt - how to make use of the existing circular buffer infrastructure clk.txt - info on the common clock framework cma/ - Continuous Memory Area (CMA) debugfs interface. conf.py - It's not of interest for those who aren't touching the build system. connector/ - docs on the netlink based userspace<->kernel space communication mod. console/ - documentation on Linux console drivers. core-api/ - documentation on kernel core components. cpu-freq/ - info on CPU frequency and voltage scaling. cpu-hotplug.txt - document describing CPU hotplug support in the Linux kernel. cpu-load.txt - document describing how CPU load statistics are collected. cpuidle/ - info on CPU_IDLE, CPU idle state management subsystem. cputopology.txt - documentation on how CPU topology info is exported via sysfs. crc32.txt - brief tutorial on CRC computation cris/ - directory with info about Linux on CRIS architecture. crypto/ - directory with info on the Crypto API. dcdbas.txt - information on the Dell Systems Management Base Driver. debugging-modules.txt - some notes on debugging modules after Linux 2.6.3. debugging-via-ohci1394.txt - how to use firewire like a hardware debugger memory reader. dell_rbu.txt - document demonstrating the use of the Dell Remote BIOS Update driver. dev-tools/ - directory with info on development tools for the kernel. device-mapper/ - directory with info on Device Mapper. dmaengine/ - the DMA engine and controller API guides. devicetree/ - directory with info on device tree files used by OF/PowerPC/ARM digsig.txt -info on the Digital Signature Verification API dma-buf-sharing.txt - the DMA Buffer Sharing API Guide docutils.conf - nothing here. Just a configuration file for docutils. dontdiff - file containing a list of files that should never be diff'ed. driver-api/ - the Linux driver implementer's API guide. driver-model/ - directory with info about Linux driver model. early-userspace/ - info about initramfs, klibc, and userspace early during boot. efi-stub.txt - How to use the EFI boot stub to bypass GRUB or elilo on EFI systems. eisa.txt - info on EISA bus support. extcon/ - directory with porting guide for Android kernel switch driver. isa.txt - info on EISA bus support. fault-injection/ - dir with docs about the fault injection capabilities infrastructure. fb/ - directory with info on the frame buffer graphics abstraction layer. features/ - status of feature implementation on different architectures. filesystems/ - info on the vfs and the various filesystems that Linux supports. firmware_class/ - request_firmware() hotplug interface info. flexible-arrays.txt - how to make use of flexible sized arrays in linux fmc/ - information about the FMC bus abstraction fpga/ - FPGA Manager Core. futex-requeue-pi.txt - info on requeueing of tasks from a non-PI futex to a PI futex gcc-plugins.txt - GCC plugin infrastructure. gpio/ - gpio related documentation gpu/ - directory with information on GPU driver developer's guide. hid/ - directory with information on human interface devices highuid.txt - notes on the change from 16 bit to 32 bit user/group IDs. hwspinlock.txt - hardware spinlock provides hardware assistance for synchronization timers/ - info on the timer related topics hw_random.txt - info on Linux support for random number generator in i8xx chipsets. hwmon/ - directory with docs on various hardware monitoring drivers. i2c/ - directory with info about the I2C bus/protocol (2 wire, kHz speed). x86/i386/ - directory with info about Linux on Intel 32 bit architecture. ia64/ - directory with info about Linux on Intel 64 bit architecture. ide/ - Information regarding the Enhanced IDE drive. iio/ - info on industrial IIO configfs support. index.rst - main index for the documentation at ReST format. infiniband/ - directory with documents concerning Linux InfiniBand support. input/ - info on Linux input device support. intel_txt.txt - info on intel Trusted Execution Technology (intel TXT). io-mapping.txt - description of io_mapping functions in linux/io-mapping.h io_ordering.txt - info on ordering I/O writes to memory-mapped addresses. ioctl/ - directory with documents describing various IOCTL calls. iostats.txt - info on I/O statistics Linux kernel provides. irqflags-tracing.txt - how to use the irq-flags tracing feature. isapnp.txt - info on Linux ISA Plug & Play support. isdn/ - directory with info on the Linux ISDN support, and supported cards. kbuild/ - directory with info about the kernel build process. kdump/ - directory with mini HowTo on getting the crash dump code to work. doc-guide/ - how to write and format reStructuredText kernel documentation kernel-per-CPU-kthreads.txt - List of all per-CPU kthreads and how they introduce jitter. kobject.txt - info of the kobject infrastructure of the Linux kernel. kprobes.txt - documents the kernel probes debugging feature. kref.txt - docs on adding reference counters (krefs) to kernel objects. laptops/ - directory with laptop related info and laptop driver documentation. ldm.txt - a brief description of LDM (Windows Dynamic Disks). leds/ - directory with info about LED handling under Linux. livepatch/ - info on kernel live patching. locking/ - directory with info about kernel locking primitives lockup-watchdogs.txt - info on soft and hard lockup detectors (aka nmi_watchdog). logo.gif - full colour GIF image of Linux logo (penguin - Tux). logo.txt - info on creator of above logo & site to get additional images from. lsm.txt - Linux Security Modules: General Security Hooks for Linux lzo.txt - kernel LZO decompressor input formats m68k/ - directory with info about Linux on Motorola 68k architecture. mailbox.txt - How to write drivers for the common mailbox framework (IPC). md/ - directory with info about Linux Software RAID media/ - info on media drivers: uAPI, kAPI and driver documentation. memory-barriers.txt - info on Linux kernel memory barriers. memory-devices/ - directory with info on parts like the Texas Instruments EMIF driver memory-hotplug.txt - Hotpluggable memory support, how to use and current status. men-chameleon-bus.txt - info on MEN chameleon bus. mic/ - Intel Many Integrated Core (MIC) architecture device driver. mips/ - directory with info about Linux on MIPS architecture. misc-devices/ - directory with info about devices using the misc dev subsystem mmc/ - directory with info about the MMC subsystem mtd/ - directory with info about memory technology devices (flash) namespaces/ - directory with various information about namespaces netlabel/ - directory with information on the NetLabel subsystem. networking/ - directory with info on various aspects of networking with Linux. nfc/ - directory relating info about Near Field Communications support. nios2/ - Linux on the Nios II architecture. nommu-mmap.txt - documentation about no-mmu memory mapping support. numastat.txt - info on how to read Numa policy hit/miss statistics in sysfs. ntb.txt - info on Non-Transparent Bridge (NTB) drivers. nvdimm/ - info on non-volatile devices. nvmem/ - info on non volatile memory framework. output/ - default directory where html/LaTeX/pdf files will be written. padata.txt - An introduction to the "padata" parallel execution API parisc/ - directory with info on using Linux on PA-RISC architecture. parport-lowlevel.txt - description and usage of the low level parallel port functions. pcmcia/ - info on the Linux PCMCIA driver. percpu-rw-semaphore.txt - RCU based read-write semaphore optimized for locking for reading perf/ - info about the APM X-Gene SoC Performance Monitoring Unit (PMU). phy/ - ino on Samsung USB 2.0 PHY adaptation layer. phy.txt - Description of the generic PHY framework. pi-futex.txt - documentation on lightweight priority inheritance futexes. pinctrl.txt - info on pinctrl subsystem and the PINMUX/PINCONF and drivers platform/ - List of supported hardware by compal and Dell laptop. pnp.txt - Linux Plug and Play documentation. power/ - directory with info on Linux PCI power management. powerpc/ - directory with info on using Linux with the PowerPC. prctl/ - directory with info on the priveledge control subsystem preempt-locking.txt - info on locking under a preemptive kernel. process/ - how to work with the mainline kernel development process. pps/ - directory with information on the pulse-per-second support pti/ - directory with info on Intel MID PTI. ptp/ - directory with info on support for IEEE 1588 PTP clocks in Linux. pwm.txt - info on the pulse width modulation driver subsystem rapidio/ - directory with info on RapidIO packet-based fabric interconnect rbtree.txt - info on what red-black trees are and what they are for. remoteproc.txt - info on how to handle remote processor (e.g. AMP) offloads/usage. rfkill.txt - info on the radio frequency kill switch subsystem/support. robust-futex-ABI.txt - documentation of the robust futex ABI. robust-futexes.txt - a description of what robust futexes are. rpmsg.txt - info on the Remote Processor Messaging (rpmsg) Framework rtc.txt - notes on how to use the Real Time Clock (aka CMOS clock) driver. s390/ - directory with info on using Linux on the IBM S390. scheduler/ - directory with info on the scheduler. scsi/ - directory with info on Linux scsi support. security/ - directory that contains security-related info serial/ - directory with info on the low level serial API. sgi-ioc4.txt - description of the SGI IOC4 PCI (multi function) device. sh/ - directory with info on porting Linux to a new architecture. smsc_ece1099.txt -info on the smsc Keyboard Scan Expansion/GPIO Expansion device. sound/ - directory with info on sound card support. spi/ - overview of Linux kernel Serial Peripheral Interface (SPI) support. sphinx/ - no documentation here, just files required by Sphinx toolchain. sphinx-static/ - no documentation here, just files required by Sphinx toolchain. static-keys.txt - info on how static keys allow debug code in hotpaths via patching svga.txt - short guide on selecting video modes at boot via VGA BIOS. sync_file.txt - Sync file API guide. sysctl/ - directory with info on the /proc/sys/* files. target/ - directory with info on generating TCM v4 fabric .ko modules tee.txt - info on the TEE subsystem and drivers this_cpu_ops.txt - List rationale behind and the way to use this_cpu operations. thermal/ - directory with information on managing thermal issues (CPU/temp) trace/ - directory with info on tracing technologies within linux translations/ - translations of this document from English to another language unaligned-memory-access.txt - info on how to avoid arch breaking unaligned memory access in code. unshare.txt - description of the Linux unshare system call. usb/ - directory with info regarding the Universal Serial Bus. vfio.txt - info on Virtual Function I/O used in guest/hypervisor instances. video-output.txt - sysfs class driver interface to enable/disable a video output device. virtual/ - directory with information on the various linux virtualizations. vm/ - directory with info on the Linux vm code. w1/ - directory with documents regarding the 1-wire (w1) subsystem. watchdog/ - how to auto-reboot Linux if it has "fallen and can't get up". ;-) wimax/ - directory with info about Intel Wireless Wimax Connections core-api/workqueue.rst - information on the Concurrency Managed Workqueue implementation x86/x86_64/ - directory with info on Linux support for AMD x86-64 (Hammer) machines. xillybus.txt - Overview and basic ui of xillybus driver xtensa/ - directory with documents relating to arch/xtensa port/implementation xz.txt - how to make use of the XZ data compression within linux kernel zorro.txt - info on writing drivers for Zorro bus devices found on Amigas.