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![Linus Torvalds](/assets/img/avatar_default.png)
some new CAN driver documentation. Beyond that, we have kernel-doc fixes, a bit more work to support reproducible builds, and the usual collection of small fixes. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJWO6HiAAoJEI3ONVYwIuV6ihwQAK0KC72h0706bdwDJ1p1/aJU QLuPeiKYWgGAXq2zgOyw3Povj4bkMwkiq1IGHLyK0Id4tg3ngxOXjimk4YKrqarI BD5HdpOm7IyQEe66ZU9b1RFDVst+bg3yp6ZIZsH5vQxl/KnyJ6AyaaDk8TPYId8S 1+CykJzxyi7GyT/jlLpHbKtBKrraoVke+cNPMAvOf0NjSyO7Ix5B+qH50sttG6Eu 9qcQ8hlKXOdZRTiGW6P+jeZNA+e5+CRpnG9VHBquHy4lI85kQThhWq41UMH690PP eRbLipeUybb0FwW2KwuMjGKEMDkMvrGJh0TzSXX9lGHd+5/41v7zcyKh8vJcpLjh bNQ2WOAKUBd2d15EP1MNoKXDLGJXusJczLwOjigWiSCQvgouAWwMrpWEw+Obv8Yl rdoH1oQqDFfDnk6mnKrSaqLWGNuLxDtkEl/1P0jsGSK6lM3FDkOgTuNPYXTJJgxN rXuGmPhyUlS2srERUeQJw2rISN0WRBvcKJGkMX6IpvrXHkItbelqK+yY1DeKPmcm qgbIx9ZWNqtltFpG22VVByqAVwucO5Nu8cAIQ2ysJsTnKOvQCQmhu5UKTjBCkEJM VpeMm32BfNiJFLuLTQGWBZ8bkRl2shQyXhOaR3uyqG4T+rpPD3qJi6dtFRpsAzOB q1nZuJCpOaxJFzjSKvpJ =emZ7 -----END PGP SIGNATURE----- Merge tag 'docs-for-linus' of git://git.lwn.net/linux Pull documentation update from Jon Corbet: "There is a nice new document from Neil on how pathname lookups work and some new CAN driver documentation. Beyond that, we have kernel-doc fixes, a bit more work to support reproducible builds, and the usual collection of small fixes" * tag 'docs-for-linus' of git://git.lwn.net/linux: (34 commits) Documentation: add new description of path-name lookup. Documentation/vm/slub.txt: document slabinfo-gnuplot.sh Doc: ABI/stable: Fix typo in ABI/stable doc: Clarify that nmi_watchdog param is for hardlockups Typo correction for description in gpio document. DocBook: Fix kernel-doc to be case-insensitive for private: kernel-docs.txt: update kernelnewbies reference Doc:kvm: Fix typo in Doc/virtual/kvm Documentation/Changes: Add bc in "Current Minimal Requirements" section Documentation/email-clients.txt: remove trailing whitespace DocBook: Use a fixed encoding for output MAINTAINERS: The docs tree has moved Docs/kernel-parameters: Add earlycon devicetree usage SubmittingPatches: make Subject examples match the de facto standard Documentation: gpio: mention that <function>-gpio has been deprecated Documentation: cgroups: just fix a few typos Documentation: Update kselftest.txt Documentation: DMA API: Be more explicit that nents is always the same Documentation: Update the default value of crashkernel low zram: update documentation ...
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411 lines
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Intro
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=====
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This document is designed to provide a list of the minimum levels of
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software necessary to run the 3.0 kernels.
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This document is originally based on my "Changes" file for 2.0.x kernels
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and therefore owes credit to the same people as that file (Jared Mauch,
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Axel Boldt, Alessandro Sigala, and countless other users all over the
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'net).
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Current Minimal Requirements
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============================
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Upgrade to at *least* these software revisions before thinking you've
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encountered a bug! If you're unsure what version you're currently
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running, the suggested command should tell you.
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Again, keep in mind that this list assumes you are already functionally
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running a Linux kernel. Also, not all tools are necessary on all
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systems; obviously, if you don't have any ISDN hardware, for example,
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you probably needn't concern yourself with isdn4k-utils.
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o GNU C 3.2 # gcc --version
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o GNU make 3.80 # make --version
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o binutils 2.12 # ld -v
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o util-linux 2.10o # fdformat --version
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o module-init-tools 0.9.10 # depmod -V
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o e2fsprogs 1.41.4 # e2fsck -V
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o jfsutils 1.1.3 # fsck.jfs -V
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o reiserfsprogs 3.6.3 # reiserfsck -V
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o xfsprogs 2.6.0 # xfs_db -V
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o squashfs-tools 4.0 # mksquashfs -version
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o btrfs-progs 0.18 # btrfsck
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o pcmciautils 004 # pccardctl -V
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o quota-tools 3.09 # quota -V
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o PPP 2.4.0 # pppd --version
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o isdn4k-utils 3.1pre1 # isdnctrl 2>&1|grep version
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o nfs-utils 1.0.5 # showmount --version
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o procps 3.2.0 # ps --version
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o oprofile 0.9 # oprofiled --version
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o udev 081 # udevd --version
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o grub 0.93 # grub --version || grub-install --version
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o mcelog 0.6 # mcelog --version
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o iptables 1.4.2 # iptables -V
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o openssl & libcrypto 1.0.0 # openssl version
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o bc 1.06.95 # bc --version
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Kernel compilation
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==================
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GCC
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---
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The gcc version requirements may vary depending on the type of CPU in your
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computer.
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Make
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----
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You will need GNU make 3.80 or later to build the kernel.
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Binutils
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--------
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Linux on IA-32 has recently switched from using as86 to using gas for
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assembling the 16-bit boot code, removing the need for as86 to compile
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your kernel. This change does, however, mean that you need a recent
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release of binutils.
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Perl
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----
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You will need perl 5 and the following modules: Getopt::Long, Getopt::Std,
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File::Basename, and File::Find to build the kernel.
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BC
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--
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You will need bc to build kernels 3.10 and higher
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OpenSSL
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-------
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Module signing and external certificate handling use the OpenSSL program and
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crypto library to do key creation and signature generation.
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You will need openssl to build kernels 3.7 and higher if module signing is
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enabled. You will also need openssl development packages to build kernels 4.3
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and higher.
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System utilities
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================
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Architectural changes
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---------------------
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DevFS has been obsoleted in favour of udev
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(http://www.kernel.org/pub/linux/utils/kernel/hotplug/)
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32-bit UID support is now in place. Have fun!
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Linux documentation for functions is transitioning to inline
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documentation via specially-formatted comments near their
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definitions in the source. These comments can be combined with the
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SGML templates in the Documentation/DocBook directory to make DocBook
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files, which can then be converted by DocBook stylesheets to PostScript,
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HTML, PDF files, and several other formats. In order to convert from
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DocBook format to a format of your choice, you'll need to install Jade as
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well as the desired DocBook stylesheets.
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Util-linux
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----------
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New versions of util-linux provide *fdisk support for larger disks,
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support new options to mount, recognize more supported partition
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types, have a fdformat which works with 2.4 kernels, and similar goodies.
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You'll probably want to upgrade.
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Ksymoops
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--------
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If the unthinkable happens and your kernel oopses, you may need the
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ksymoops tool to decode it, but in most cases you don't.
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It is generally preferred to build the kernel with CONFIG_KALLSYMS so
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that it produces readable dumps that can be used as-is (this also
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produces better output than ksymoops). If for some reason your kernel
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is not build with CONFIG_KALLSYMS and you have no way to rebuild and
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reproduce the Oops with that option, then you can still decode that Oops
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with ksymoops.
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Module-Init-Tools
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-----------------
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A new module loader is now in the kernel that requires module-init-tools
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to use. It is backward compatible with the 2.4.x series kernels.
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Mkinitrd
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--------
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These changes to the /lib/modules file tree layout also require that
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mkinitrd be upgraded.
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E2fsprogs
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---------
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The latest version of e2fsprogs fixes several bugs in fsck and
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debugfs. Obviously, it's a good idea to upgrade.
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JFSutils
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--------
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The jfsutils package contains the utilities for the file system.
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The following utilities are available:
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o fsck.jfs - initiate replay of the transaction log, and check
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and repair a JFS formatted partition.
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o mkfs.jfs - create a JFS formatted partition.
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o other file system utilities are also available in this package.
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Reiserfsprogs
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-------------
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The reiserfsprogs package should be used for reiserfs-3.6.x
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(Linux kernels 2.4.x). It is a combined package and contains working
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versions of mkreiserfs, resize_reiserfs, debugreiserfs and
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reiserfsck. These utils work on both i386 and alpha platforms.
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Xfsprogs
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--------
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The latest version of xfsprogs contains mkfs.xfs, xfs_db, and the
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xfs_repair utilities, among others, for the XFS filesystem. It is
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architecture independent and any version from 2.0.0 onward should
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work correctly with this version of the XFS kernel code (2.6.0 or
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later is recommended, due to some significant improvements).
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PCMCIAutils
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-----------
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PCMCIAutils replaces pcmcia-cs. It properly sets up
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PCMCIA sockets at system startup and loads the appropriate modules
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for 16-bit PCMCIA devices if the kernel is modularized and the hotplug
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subsystem is used.
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Quota-tools
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-----------
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Support for 32 bit uid's and gid's is required if you want to use
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the newer version 2 quota format. Quota-tools version 3.07 and
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newer has this support. Use the recommended version or newer
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from the table above.
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Intel IA32 microcode
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--------------------
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A driver has been added to allow updating of Intel IA32 microcode,
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accessible as a normal (misc) character device. If you are not using
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udev you may need to:
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mkdir /dev/cpu
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mknod /dev/cpu/microcode c 10 184
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chmod 0644 /dev/cpu/microcode
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as root before you can use this. You'll probably also want to
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get the user-space microcode_ctl utility to use with this.
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udev
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----
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udev is a userspace application for populating /dev dynamically with
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only entries for devices actually present. udev replaces the basic
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functionality of devfs, while allowing persistent device naming for
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devices.
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FUSE
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----
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Needs libfuse 2.4.0 or later. Absolute minimum is 2.3.0 but mount
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options 'direct_io' and 'kernel_cache' won't work.
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Networking
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==========
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General changes
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---------------
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If you have advanced network configuration needs, you should probably
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consider using the network tools from ip-route2.
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Packet Filter / NAT
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-------------------
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The packet filtering and NAT code uses the same tools like the previous 2.4.x
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kernel series (iptables). It still includes backwards-compatibility modules
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for 2.2.x-style ipchains and 2.0.x-style ipfwadm.
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PPP
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---
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The PPP driver has been restructured to support multilink and to
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enable it to operate over diverse media layers. If you use PPP,
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upgrade pppd to at least 2.4.0.
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If you are not using udev, you must have the device file /dev/ppp
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which can be made by:
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mknod /dev/ppp c 108 0
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as root.
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Isdn4k-utils
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------------
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Due to changes in the length of the phone number field, isdn4k-utils
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needs to be recompiled or (preferably) upgraded.
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NFS-utils
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---------
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In ancient (2.4 and earlier) kernels, the nfs server needed to know
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about any client that expected to be able to access files via NFS. This
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information would be given to the kernel by "mountd" when the client
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mounted the filesystem, or by "exportfs" at system startup. exportfs
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would take information about active clients from /var/lib/nfs/rmtab.
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This approach is quite fragile as it depends on rmtab being correct
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which is not always easy, particularly when trying to implement
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fail-over. Even when the system is working well, rmtab suffers from
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getting lots of old entries that never get removed.
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With modern kernels we have the option of having the kernel tell mountd
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when it gets a request from an unknown host, and mountd can give
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appropriate export information to the kernel. This removes the
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dependency on rmtab and means that the kernel only needs to know about
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currently active clients.
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To enable this new functionality, you need to:
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mount -t nfsd nfsd /proc/fs/nfsd
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before running exportfs or mountd. It is recommended that all NFS
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services be protected from the internet-at-large by a firewall where
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that is possible.
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mcelog
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------
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On x86 kernels the mcelog utility is needed to process and log machine check
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events when CONFIG_X86_MCE is enabled. Machine check events are errors reported
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by the CPU. Processing them is strongly encouraged.
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Getting updated software
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========================
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Kernel compilation
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******************
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gcc
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---
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o <ftp://ftp.gnu.org/gnu/gcc/>
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Make
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----
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o <ftp://ftp.gnu.org/gnu/make/>
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Binutils
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--------
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o <ftp://ftp.kernel.org/pub/linux/devel/binutils/>
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OpenSSL
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-------
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o <https://www.openssl.org/>
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System utilities
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****************
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Util-linux
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----------
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o <ftp://ftp.kernel.org/pub/linux/utils/util-linux/>
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Ksymoops
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--------
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o <ftp://ftp.kernel.org/pub/linux/utils/kernel/ksymoops/v2.4/>
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Module-Init-Tools
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-----------------
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o <ftp://ftp.kernel.org/pub/linux/kernel/people/rusty/modules/>
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Mkinitrd
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--------
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o <https://code.launchpad.net/initrd-tools/main>
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E2fsprogs
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---------
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o <http://prdownloads.sourceforge.net/e2fsprogs/e2fsprogs-1.29.tar.gz>
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JFSutils
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--------
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o <http://jfs.sourceforge.net/>
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Reiserfsprogs
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-------------
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o <http://www.kernel.org/pub/linux/utils/fs/reiserfs/>
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Xfsprogs
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--------
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o <ftp://oss.sgi.com/projects/xfs/>
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Pcmciautils
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-----------
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o <ftp://ftp.kernel.org/pub/linux/utils/kernel/pcmcia/>
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Quota-tools
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----------
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o <http://sourceforge.net/projects/linuxquota/>
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DocBook Stylesheets
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-------------------
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o <http://sourceforge.net/projects/docbook/files/docbook-dsssl/>
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XMLTO XSLT Frontend
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-------------------
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o <http://cyberelk.net/tim/xmlto/>
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Intel P6 microcode
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------------------
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o <https://downloadcenter.intel.com/>
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udev
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----
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o <http://www.freedesktop.org/software/systemd/man/udev.html>
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FUSE
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----
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o <http://sourceforge.net/projects/fuse>
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mcelog
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------
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o <http://www.mcelog.org/>
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Networking
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**********
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PPP
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---
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o <ftp://ftp.samba.org/pub/ppp/>
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Isdn4k-utils
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------------
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o <ftp://ftp.isdn4linux.de/pub/isdn4linux/utils/>
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NFS-utils
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---------
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o <http://sourceforge.net/project/showfiles.php?group_id=14>
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Iptables
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--------
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o <http://www.iptables.org/downloads.html>
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Ip-route2
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---------
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o <https://www.kernel.org/pub/linux/utils/net/iproute2/>
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OProfile
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--------
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o <http://oprofile.sf.net/download/>
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NFS-Utils
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---------
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o <http://nfs.sourceforge.net/>
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