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Diff markup

Differences between /Documentation/Changes (Version linux-6.12-rc7) and /Documentation/Changes (Version linux-6.7.12)


  1 .. _changes:                                        1 .. _changes:
  2                                                     2 
  3 Minimal requirements to compile the Kernel          3 Minimal requirements to compile the Kernel
  4 ++++++++++++++++++++++++++++++++++++++++++          4 ++++++++++++++++++++++++++++++++++++++++++
  5                                                     5 
  6 Intro                                               6 Intro
  7 =====                                               7 =====
  8                                                     8 
  9 This document is designed to provide a list of      9 This document is designed to provide a list of the minimum levels of
 10 software necessary to run the current kernel v     10 software necessary to run the current kernel version.
 11                                                    11 
 12 This document is originally based on my "Chang     12 This document is originally based on my "Changes" file for 2.0.x kernels
 13 and therefore owes credit to the same people a     13 and therefore owes credit to the same people as that file (Jared Mauch,
 14 Axel Boldt, Alessandro Sigala, and countless o     14 Axel Boldt, Alessandro Sigala, and countless other users all over the
 15 'net).                                             15 'net).
 16                                                    16 
 17 Current Minimal Requirements                       17 Current Minimal Requirements
 18 ****************************                       18 ****************************
 19                                                    19 
 20 Upgrade to at **least** these software revisio     20 Upgrade to at **least** these software revisions before thinking you've
 21 encountered a bug!  If you're unsure what vers     21 encountered a bug!  If you're unsure what version you're currently
 22 running, the suggested command should tell you     22 running, the suggested command should tell you.
 23                                                    23 
 24 Again, keep in mind that this list assumes you     24 Again, keep in mind that this list assumes you are already functionally
 25 running a Linux kernel.  Also, not all tools a     25 running a Linux kernel.  Also, not all tools are necessary on all
 26 systems; obviously, if you don't have any PC C     26 systems; obviously, if you don't have any PC Card hardware, for example,
 27 you probably needn't concern yourself with pcm     27 you probably needn't concern yourself with pcmciautils.
 28                                                    28 
 29 ====================== ===============  ======     29 ====================== ===============  ========================================
 30         Program        Minimal version       C     30         Program        Minimal version       Command to check the version
 31 ====================== ===============  ======     31 ====================== ===============  ========================================
 32 GNU C                  5.1              gcc --     32 GNU C                  5.1              gcc --version
 33 Clang/LLVM (optional)  13.0.1           clang  !!  33 Clang/LLVM (optional)  11.0.0           clang --version
 34 Rust (optional)        1.78.0           rustc  !!  34 Rust (optional)        1.73.0           rustc --version
 35 bindgen (optional)     0.65.1           bindge     35 bindgen (optional)     0.65.1           bindgen --version
 36 GNU make               4.0              make - !!  36 GNU make               3.82             make --version
 37 bash                   4.2              bash -     37 bash                   4.2              bash --version
 38 binutils               2.25             ld -v      38 binutils               2.25             ld -v
 39 flex                   2.5.35           flex -     39 flex                   2.5.35           flex --version
 40 bison                  2.0              bison      40 bison                  2.0              bison --version
 41 pahole                 1.16             pahole     41 pahole                 1.16             pahole --version
 42 util-linux             2.10o            mount  !!  42 util-linux             2.10o            fdformat --version
 43 kmod                   13               depmod     43 kmod                   13               depmod -V
 44 e2fsprogs              1.41.4           e2fsck     44 e2fsprogs              1.41.4           e2fsck -V
 45 jfsutils               1.1.3            fsck.j     45 jfsutils               1.1.3            fsck.jfs -V
 46 reiserfsprogs          3.6.3            reiser     46 reiserfsprogs          3.6.3            reiserfsck -V
 47 xfsprogs               2.6.0            xfs_db     47 xfsprogs               2.6.0            xfs_db -V
 48 squashfs-tools         4.0              mksqua     48 squashfs-tools         4.0              mksquashfs -version
 49 btrfs-progs            0.18             btrfsc     49 btrfs-progs            0.18             btrfsck
 50 pcmciautils            004              pccard     50 pcmciautils            004              pccardctl -V
 51 quota-tools            3.09             quota      51 quota-tools            3.09             quota -V
 52 PPP                    2.4.0            pppd -     52 PPP                    2.4.0            pppd --version
 53 nfs-utils              1.0.5            showmo     53 nfs-utils              1.0.5            showmount --version
 54 procps                 3.2.0            ps --v     54 procps                 3.2.0            ps --version
 55 udev                   081              udevd      55 udev                   081              udevd --version
 56 grub                   0.93             grub -     56 grub                   0.93             grub --version || grub-install --version
 57 mcelog                 0.6              mcelog     57 mcelog                 0.6              mcelog --version
 58 iptables               1.4.2            iptabl     58 iptables               1.4.2            iptables -V
 59 openssl & libcrypto    1.0.0            openss     59 openssl & libcrypto    1.0.0            openssl version
 60 bc                     1.06.95          bc --v     60 bc                     1.06.95          bc --version
 61 Sphinx\ [#f1]_         2.4.4            sphinx !!  61 Sphinx\ [#f1]_         1.7              sphinx-build --version
 62 cpio                   any              cpio -     62 cpio                   any              cpio --version
 63 GNU tar                1.28             tar --     63 GNU tar                1.28             tar --version
 64 gtags (optional)       6.6.5            gtags      64 gtags (optional)       6.6.5            gtags --version
 65 mkimage (optional)     2017.01          mkimag << 
 66 Python (optional)      3.5.x            python << 
 67 GNU AWK (optional)     5.1.0            gawk - << 
 68 ====================== ===============  ======     65 ====================== ===============  ========================================
 69                                                    66 
 70 .. [#f1] Sphinx is needed only to build the Ke     67 .. [#f1] Sphinx is needed only to build the Kernel documentation
 71                                                    68 
 72 Kernel compilation                                 69 Kernel compilation
 73 ******************                                 70 ******************
 74                                                    71 
 75 GCC                                                72 GCC
 76 ---                                                73 ---
 77                                                    74 
 78 The gcc version requirements may vary dependin     75 The gcc version requirements may vary depending on the type of CPU in your
 79 computer.                                          76 computer.
 80                                                    77 
 81 Clang/LLVM (optional)                              78 Clang/LLVM (optional)
 82 ---------------------                              79 ---------------------
 83                                                    80 
 84 The latest formal release of clang and LLVM ut     81 The latest formal release of clang and LLVM utils (according to
 85 `releases.llvm.org <https://releases.llvm.org>     82 `releases.llvm.org <https://releases.llvm.org>`_) are supported for building
 86 kernels. Older releases aren't guaranteed to w     83 kernels. Older releases aren't guaranteed to work, and we may drop workarounds
 87 from the kernel that were used to support olde     84 from the kernel that were used to support older versions. Please see additional
 88 docs on :ref:`Building Linux with Clang/LLVM <     85 docs on :ref:`Building Linux with Clang/LLVM <kbuild_llvm>`.
 89                                                    86 
 90 Rust (optional)                                    87 Rust (optional)
 91 ---------------                                    88 ---------------
 92                                                    89 
 93 A recent version of the Rust compiler is requi !!  90 A particular version of the Rust toolchain is required. Newer versions may or
                                                   >>  91 may not work because the kernel depends on some unstable Rust features, for
                                                   >>  92 the moment.
                                                   >>  93 
                                                   >>  94 Each Rust toolchain comes with several "components", some of which are required
                                                   >>  95 (like ``rustc``) and some that are optional. The ``rust-src`` component (which
                                                   >>  96 is optional) needs to be installed to build the kernel. Other components are
                                                   >>  97 useful for developing.
 94                                                    98 
 95 Please see Documentation/rust/quick-start.rst      99 Please see Documentation/rust/quick-start.rst for instructions on how to
 96 satisfy the build requirements of Rust support    100 satisfy the build requirements of Rust support. In particular, the ``Makefile``
 97 target ``rustavailable`` is useful to check wh    101 target ``rustavailable`` is useful to check why the Rust toolchain may not
 98 be detected.                                      102 be detected.
 99                                                   103 
100 bindgen (optional)                                104 bindgen (optional)
101 ------------------                                105 ------------------
102                                                   106 
103 ``bindgen`` is used to generate the Rust bindi    107 ``bindgen`` is used to generate the Rust bindings to the C side of the kernel.
104 It depends on ``libclang``.                       108 It depends on ``libclang``.
105                                                   109 
106 Make                                              110 Make
107 ----                                              111 ----
108                                                   112 
109 You will need GNU make 4.0 or later to build t !! 113 You will need GNU make 3.82 or later to build the kernel.
110                                                   114 
111 Bash                                              115 Bash
112 ----                                              116 ----
113                                                   117 
114 Some bash scripts are used for the kernel buil    118 Some bash scripts are used for the kernel build.
115 Bash 4.2 or newer is needed.                      119 Bash 4.2 or newer is needed.
116                                                   120 
117 Binutils                                          121 Binutils
118 --------                                          122 --------
119                                                   123 
120 Binutils 2.25 or newer is needed to build the     124 Binutils 2.25 or newer is needed to build the kernel.
121                                                   125 
122 pkg-config                                        126 pkg-config
123 ----------                                        127 ----------
124                                                   128 
125 The build system, as of 4.18, requires pkg-con    129 The build system, as of 4.18, requires pkg-config to check for installed
126 kconfig tools and to determine flags settings     130 kconfig tools and to determine flags settings for use in
127 'make {g,x}config'.  Previously pkg-config was    131 'make {g,x}config'.  Previously pkg-config was being used but not
128 verified or documented.                           132 verified or documented.
129                                                   133 
130 Flex                                              134 Flex
131 ----                                              135 ----
132                                                   136 
133 Since Linux 4.16, the build system generates l    137 Since Linux 4.16, the build system generates lexical analyzers
134 during build.  This requires flex 2.5.35 or la    138 during build.  This requires flex 2.5.35 or later.
135                                                   139 
136                                                   140 
137 Bison                                             141 Bison
138 -----                                             142 -----
139                                                   143 
140 Since Linux 4.16, the build system generates p    144 Since Linux 4.16, the build system generates parsers
141 during build.  This requires bison 2.0 or late    145 during build.  This requires bison 2.0 or later.
142                                                   146 
143 pahole                                         !! 147 pahole:
144 ------                                         !! 148 -------
145                                                   149 
146 Since Linux 5.2, if CONFIG_DEBUG_INFO_BTF is s    150 Since Linux 5.2, if CONFIG_DEBUG_INFO_BTF is selected, the build system
147 generates BTF (BPF Type Format) from DWARF in     151 generates BTF (BPF Type Format) from DWARF in vmlinux, a bit later from kernel
148 modules as well.  This requires pahole v1.16 o    152 modules as well.  This requires pahole v1.16 or later.
149                                                   153 
150 It is found in the 'dwarves' or 'pahole' distr    154 It is found in the 'dwarves' or 'pahole' distro packages or from
151 https://fedorapeople.org/~acme/dwarves/.          155 https://fedorapeople.org/~acme/dwarves/.
152                                                   156 
153 Perl                                              157 Perl
154 ----                                              158 ----
155                                                   159 
156 You will need perl 5 and the following modules    160 You will need perl 5 and the following modules: ``Getopt::Long``,
157 ``Getopt::Std``, ``File::Basename``, and ``Fil    161 ``Getopt::Std``, ``File::Basename``, and ``File::Find`` to build the kernel.
158                                                   162 
159 BC                                                163 BC
160 --                                                164 --
161                                                   165 
162 You will need bc to build kernels 3.10 and hig    166 You will need bc to build kernels 3.10 and higher
163                                                   167 
164                                                   168 
165 OpenSSL                                           169 OpenSSL
166 -------                                           170 -------
167                                                   171 
168 Module signing and external certificate handli    172 Module signing and external certificate handling use the OpenSSL program and
169 crypto library to do key creation and signatur    173 crypto library to do key creation and signature generation.
170                                                   174 
171 You will need openssl to build kernels 3.7 and    175 You will need openssl to build kernels 3.7 and higher if module signing is
172 enabled.  You will also need openssl developme    176 enabled.  You will also need openssl development packages to build kernels 4.3
173 and higher.                                       177 and higher.
174                                                   178 
175 Tar                                               179 Tar
176 ---                                               180 ---
177                                                   181 
178 GNU tar is needed if you want to enable access    182 GNU tar is needed if you want to enable access to the kernel headers via sysfs
179 (CONFIG_IKHEADERS).                               183 (CONFIG_IKHEADERS).
180                                                   184 
181 gtags / GNU GLOBAL (optional)                     185 gtags / GNU GLOBAL (optional)
182 -----------------------------                     186 -----------------------------
183                                                   187 
184 The kernel build requires GNU GLOBAL version 6    188 The kernel build requires GNU GLOBAL version 6.6.5 or later to generate
185 tag files through ``make gtags``.  This is due    189 tag files through ``make gtags``.  This is due to its use of the gtags
186 ``-C (--directory)`` flag.                        190 ``-C (--directory)`` flag.
187                                                   191 
188 mkimage                                        << 
189 -------                                        << 
190                                                << 
191 This tool is used when building a Flat Image T << 
192 platforms. The tool is available via the ``u-b << 
193 built from the U-Boot source code. See the ins << 
194 https://docs.u-boot.org/en/latest/build/tools. << 
195                                                << 
196 GNU AWK                                        << 
197 -------                                        << 
198                                                << 
199 GNU AWK is needed if you want kernel builds to << 
200 builtin modules (CONFIG_BUILTIN_MODULE_RANGES) << 
201                                                << 
202 System utilities                                  192 System utilities
203 ****************                                  193 ****************
204                                                   194 
205 Architectural changes                             195 Architectural changes
206 ---------------------                             196 ---------------------
207                                                   197 
208 DevFS has been obsoleted in favour of udev        198 DevFS has been obsoleted in favour of udev
209 (https://www.kernel.org/pub/linux/utils/kernel    199 (https://www.kernel.org/pub/linux/utils/kernel/hotplug/)
210                                                   200 
211 32-bit UID support is now in place.  Have fun!    201 32-bit UID support is now in place.  Have fun!
212                                                   202 
213 Linux documentation for functions is transitio    203 Linux documentation for functions is transitioning to inline
214 documentation via specially-formatted comments    204 documentation via specially-formatted comments near their
215 definitions in the source.  These comments can    205 definitions in the source.  These comments can be combined with ReST
216 files the Documentation/ directory to make enr    206 files the Documentation/ directory to make enriched documentation, which can
217 then be converted to PostScript, HTML, LaTex,     207 then be converted to PostScript, HTML, LaTex, ePUB and PDF files.
218 In order to convert from ReST format to a form    208 In order to convert from ReST format to a format of your choice, you'll need
219 Sphinx.                                           209 Sphinx.
220                                                   210 
221 Util-linux                                        211 Util-linux
222 ----------                                        212 ----------
223                                                   213 
224 New versions of util-linux provide ``fdisk`` s    214 New versions of util-linux provide ``fdisk`` support for larger disks,
225 support new options to mount, recognize more s    215 support new options to mount, recognize more supported partition
226 types, and similar goodies.                    !! 216 types, have a fdformat which works with 2.4 kernels, and similar goodies.
227 You'll probably want to upgrade.                  217 You'll probably want to upgrade.
228                                                   218 
229 Ksymoops                                          219 Ksymoops
230 --------                                          220 --------
231                                                   221 
232 If the unthinkable happens and your kernel oop    222 If the unthinkable happens and your kernel oopses, you may need the
233 ksymoops tool to decode it, but in most cases     223 ksymoops tool to decode it, but in most cases you don't.
234 It is generally preferred to build the kernel     224 It is generally preferred to build the kernel with ``CONFIG_KALLSYMS`` so
235 that it produces readable dumps that can be us    225 that it produces readable dumps that can be used as-is (this also
236 produces better output than ksymoops).  If for    226 produces better output than ksymoops).  If for some reason your kernel
237 is not build with ``CONFIG_KALLSYMS`` and you     227 is not build with ``CONFIG_KALLSYMS`` and you have no way to rebuild and
238 reproduce the Oops with that option, then you     228 reproduce the Oops with that option, then you can still decode that Oops
239 with ksymoops.                                    229 with ksymoops.
240                                                   230 
241 Mkinitrd                                          231 Mkinitrd
242 --------                                          232 --------
243                                                   233 
244 These changes to the ``/lib/modules`` file tre    234 These changes to the ``/lib/modules`` file tree layout also require that
245 mkinitrd be upgraded.                             235 mkinitrd be upgraded.
246                                                   236 
247 E2fsprogs                                         237 E2fsprogs
248 ---------                                         238 ---------
249                                                   239 
250 The latest version of ``e2fsprogs`` fixes seve    240 The latest version of ``e2fsprogs`` fixes several bugs in fsck and
251 debugfs.  Obviously, it's a good idea to upgra    241 debugfs.  Obviously, it's a good idea to upgrade.
252                                                   242 
253 JFSutils                                          243 JFSutils
254 --------                                          244 --------
255                                                   245 
256 The ``jfsutils`` package contains the utilitie    246 The ``jfsutils`` package contains the utilities for the file system.
257 The following utilities are available:            247 The following utilities are available:
258                                                   248 
259 - ``fsck.jfs`` - initiate replay of the transa    249 - ``fsck.jfs`` - initiate replay of the transaction log, and check
260   and repair a JFS formatted partition.           250   and repair a JFS formatted partition.
261                                                   251 
262 - ``mkfs.jfs`` - create a JFS formatted partit    252 - ``mkfs.jfs`` - create a JFS formatted partition.
263                                                   253 
264 - other file system utilities are also availab    254 - other file system utilities are also available in this package.
265                                                   255 
266 Reiserfsprogs                                     256 Reiserfsprogs
267 -------------                                     257 -------------
268                                                   258 
269 The reiserfsprogs package should be used for r    259 The reiserfsprogs package should be used for reiserfs-3.6.x
270 (Linux kernels 2.4.x). It is a combined packag    260 (Linux kernels 2.4.x). It is a combined package and contains working
271 versions of ``mkreiserfs``, ``resize_reiserfs`    261 versions of ``mkreiserfs``, ``resize_reiserfs``, ``debugreiserfs`` and
272 ``reiserfsck``. These utils work on both i386     262 ``reiserfsck``. These utils work on both i386 and alpha platforms.
273                                                   263 
274 Xfsprogs                                          264 Xfsprogs
275 --------                                          265 --------
276                                                   266 
277 The latest version of ``xfsprogs`` contains ``    267 The latest version of ``xfsprogs`` contains ``mkfs.xfs``, ``xfs_db``, and the
278 ``xfs_repair`` utilities, among others, for th    268 ``xfs_repair`` utilities, among others, for the XFS filesystem.  It is
279 architecture independent and any version from     269 architecture independent and any version from 2.0.0 onward should
280 work correctly with this version of the XFS ke    270 work correctly with this version of the XFS kernel code (2.6.0 or
281 later is recommended, due to some significant     271 later is recommended, due to some significant improvements).
282                                                   272 
283 PCMCIAutils                                       273 PCMCIAutils
284 -----------                                       274 -----------
285                                                   275 
286 PCMCIAutils replaces ``pcmcia-cs``. It properl    276 PCMCIAutils replaces ``pcmcia-cs``. It properly sets up
287 PCMCIA sockets at system startup and loads the    277 PCMCIA sockets at system startup and loads the appropriate modules
288 for 16-bit PCMCIA devices if the kernel is mod    278 for 16-bit PCMCIA devices if the kernel is modularized and the hotplug
289 subsystem is used.                                279 subsystem is used.
290                                                   280 
291 Quota-tools                                       281 Quota-tools
292 -----------                                       282 -----------
293                                                   283 
294 Support for 32 bit uid's and gid's is required    284 Support for 32 bit uid's and gid's is required if you want to use
295 the newer version 2 quota format.  Quota-tools    285 the newer version 2 quota format.  Quota-tools version 3.07 and
296 newer has this support.  Use the recommended v    286 newer has this support.  Use the recommended version or newer
297 from the table above.                             287 from the table above.
298                                                   288 
299 Intel IA32 microcode                              289 Intel IA32 microcode
300 --------------------                              290 --------------------
301                                                   291 
302 A driver has been added to allow updating of I    292 A driver has been added to allow updating of Intel IA32 microcode,
303 accessible as a normal (misc) character device    293 accessible as a normal (misc) character device.  If you are not using
304 udev you may need to::                            294 udev you may need to::
305                                                   295 
306   mkdir /dev/cpu                                  296   mkdir /dev/cpu
307   mknod /dev/cpu/microcode c 10 184               297   mknod /dev/cpu/microcode c 10 184
308   chmod 0644 /dev/cpu/microcode                   298   chmod 0644 /dev/cpu/microcode
309                                                   299 
310 as root before you can use this.  You'll proba    300 as root before you can use this.  You'll probably also want to
311 get the user-space microcode_ctl utility to us    301 get the user-space microcode_ctl utility to use with this.
312                                                   302 
313 udev                                              303 udev
314 ----                                              304 ----
315                                                   305 
316 ``udev`` is a userspace application for popula    306 ``udev`` is a userspace application for populating ``/dev`` dynamically with
317 only entries for devices actually present. ``u    307 only entries for devices actually present. ``udev`` replaces the basic
318 functionality of devfs, while allowing persist    308 functionality of devfs, while allowing persistent device naming for
319 devices.                                          309 devices.
320                                                   310 
321 FUSE                                              311 FUSE
322 ----                                              312 ----
323                                                   313 
324 Needs libfuse 2.4.0 or later.  Absolute minimu    314 Needs libfuse 2.4.0 or later.  Absolute minimum is 2.3.0 but mount
325 options ``direct_io`` and ``kernel_cache`` won    315 options ``direct_io`` and ``kernel_cache`` won't work.
326                                                   316 
327 Networking                                        317 Networking
328 **********                                        318 **********
329                                                   319 
330 General changes                                   320 General changes
331 ---------------                                   321 ---------------
332                                                   322 
333 If you have advanced network configuration nee    323 If you have advanced network configuration needs, you should probably
334 consider using the network tools from ip-route    324 consider using the network tools from ip-route2.
335                                                   325 
336 Packet Filter / NAT                               326 Packet Filter / NAT
337 -------------------                               327 -------------------
338 The packet filtering and NAT code uses the sam    328 The packet filtering and NAT code uses the same tools like the previous 2.4.x
339 kernel series (iptables).  It still includes b    329 kernel series (iptables).  It still includes backwards-compatibility modules
340 for 2.2.x-style ipchains and 2.0.x-style ipfwa    330 for 2.2.x-style ipchains and 2.0.x-style ipfwadm.
341                                                   331 
342 PPP                                               332 PPP
343 ---                                               333 ---
344                                                   334 
345 The PPP driver has been restructured to suppor    335 The PPP driver has been restructured to support multilink and to
346 enable it to operate over diverse media layers    336 enable it to operate over diverse media layers.  If you use PPP,
347 upgrade pppd to at least 2.4.0.                   337 upgrade pppd to at least 2.4.0.
348                                                   338 
349 If you are not using udev, you must have the d    339 If you are not using udev, you must have the device file /dev/ppp
350 which can be made by::                            340 which can be made by::
351                                                   341 
352   mknod /dev/ppp c 108 0                          342   mknod /dev/ppp c 108 0
353                                                   343 
354 as root.                                          344 as root.
355                                                   345 
356 NFS-utils                                         346 NFS-utils
357 ---------                                         347 ---------
358                                                   348 
359 In ancient (2.4 and earlier) kernels, the nfs     349 In ancient (2.4 and earlier) kernels, the nfs server needed to know
360 about any client that expected to be able to a    350 about any client that expected to be able to access files via NFS.  This
361 information would be given to the kernel by ``    351 information would be given to the kernel by ``mountd`` when the client
362 mounted the filesystem, or by ``exportfs`` at     352 mounted the filesystem, or by ``exportfs`` at system startup.  exportfs
363 would take information about active clients fr    353 would take information about active clients from ``/var/lib/nfs/rmtab``.
364                                                   354 
365 This approach is quite fragile as it depends o    355 This approach is quite fragile as it depends on rmtab being correct
366 which is not always easy, particularly when tr    356 which is not always easy, particularly when trying to implement
367 fail-over.  Even when the system is working we    357 fail-over.  Even when the system is working well, ``rmtab`` suffers from
368 getting lots of old entries that never get rem    358 getting lots of old entries that never get removed.
369                                                   359 
370 With modern kernels we have the option of havi    360 With modern kernels we have the option of having the kernel tell mountd
371 when it gets a request from an unknown host, a    361 when it gets a request from an unknown host, and mountd can give
372 appropriate export information to the kernel.     362 appropriate export information to the kernel.  This removes the
373 dependency on ``rmtab`` and means that the ker    363 dependency on ``rmtab`` and means that the kernel only needs to know about
374 currently active clients.                         364 currently active clients.
375                                                   365 
376 To enable this new functionality, you need to:    366 To enable this new functionality, you need to::
377                                                   367 
378   mount -t nfsd nfsd /proc/fs/nfsd                368   mount -t nfsd nfsd /proc/fs/nfsd
379                                                   369 
380 before running exportfs or mountd.  It is reco    370 before running exportfs or mountd.  It is recommended that all NFS
381 services be protected from the internet-at-lar    371 services be protected from the internet-at-large by a firewall where
382 that is possible.                                 372 that is possible.
383                                                   373 
384 mcelog                                            374 mcelog
385 ------                                            375 ------
386                                                   376 
387 On x86 kernels the mcelog utility is needed to    377 On x86 kernels the mcelog utility is needed to process and log machine check
388 events when ``CONFIG_X86_MCE`` is enabled. Mac    378 events when ``CONFIG_X86_MCE`` is enabled. Machine check events are errors
389 reported by the CPU. Processing them is strong    379 reported by the CPU. Processing them is strongly encouraged.
390                                                   380 
391 Kernel documentation                              381 Kernel documentation
392 ********************                              382 ********************
393                                                   383 
394 Sphinx                                            384 Sphinx
395 ------                                            385 ------
396                                                   386 
397 Please see :ref:`sphinx_install` in :ref:`Docu    387 Please see :ref:`sphinx_install` in :ref:`Documentation/doc-guide/sphinx.rst <sphinxdoc>`
398 for details about Sphinx requirements.            388 for details about Sphinx requirements.
399                                                   389 
400 rustdoc                                           390 rustdoc
401 -------                                           391 -------
402                                                   392 
403 ``rustdoc`` is used to generate the documentat    393 ``rustdoc`` is used to generate the documentation for Rust code. Please see
404 Documentation/rust/general-information.rst for    394 Documentation/rust/general-information.rst for more information.
405                                                   395 
406 Getting updated software                          396 Getting updated software
407 ========================                          397 ========================
408                                                   398 
409 Kernel compilation                                399 Kernel compilation
410 ******************                                400 ******************
411                                                   401 
412 gcc                                               402 gcc
413 ---                                               403 ---
414                                                   404 
415 - <ftp://ftp.gnu.org/gnu/gcc/>                    405 - <ftp://ftp.gnu.org/gnu/gcc/>
416                                                   406 
417 Clang/LLVM                                        407 Clang/LLVM
418 ----------                                        408 ----------
419                                                   409 
420 - :ref:`Getting LLVM <getting_llvm>`.             410 - :ref:`Getting LLVM <getting_llvm>`.
421                                                   411 
422 Rust                                              412 Rust
423 ----                                              413 ----
424                                                   414 
425 - Documentation/rust/quick-start.rst.             415 - Documentation/rust/quick-start.rst.
426                                                   416 
427 bindgen                                           417 bindgen
428 -------                                           418 -------
429                                                   419 
430 - Documentation/rust/quick-start.rst.             420 - Documentation/rust/quick-start.rst.
431                                                   421 
432 Make                                              422 Make
433 ----                                              423 ----
434                                                   424 
435 - <ftp://ftp.gnu.org/gnu/make/>                   425 - <ftp://ftp.gnu.org/gnu/make/>
436                                                   426 
437 Bash                                              427 Bash
438 ----                                              428 ----
439                                                   429 
440 - <ftp://ftp.gnu.org/gnu/bash/>                   430 - <ftp://ftp.gnu.org/gnu/bash/>
441                                                   431 
442 Binutils                                          432 Binutils
443 --------                                          433 --------
444                                                   434 
445 - <https://www.kernel.org/pub/linux/devel/binu    435 - <https://www.kernel.org/pub/linux/devel/binutils/>
446                                                   436 
447 Flex                                              437 Flex
448 ----                                              438 ----
449                                                   439 
450 - <https://github.com/westes/flex/releases>       440 - <https://github.com/westes/flex/releases>
451                                                   441 
452 Bison                                             442 Bison
453 -----                                             443 -----
454                                                   444 
455 - <ftp://ftp.gnu.org/gnu/bison/>                  445 - <ftp://ftp.gnu.org/gnu/bison/>
456                                                   446 
457 OpenSSL                                           447 OpenSSL
458 -------                                           448 -------
459                                                   449 
460 - <https://www.openssl.org/>                      450 - <https://www.openssl.org/>
461                                                   451 
462 System utilities                                  452 System utilities
463 ****************                                  453 ****************
464                                                   454 
465 Util-linux                                        455 Util-linux
466 ----------                                        456 ----------
467                                                   457 
468 - <https://www.kernel.org/pub/linux/utils/util    458 - <https://www.kernel.org/pub/linux/utils/util-linux/>
469                                                   459 
470 Kmod                                              460 Kmod
471 ----                                              461 ----
472                                                   462 
473 - <https://www.kernel.org/pub/linux/utils/kern    463 - <https://www.kernel.org/pub/linux/utils/kernel/kmod/>
474 - <https://git.kernel.org/pub/scm/utils/kernel    464 - <https://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git>
475                                                   465 
476 Ksymoops                                          466 Ksymoops
477 --------                                          467 --------
478                                                   468 
479 - <https://www.kernel.org/pub/linux/utils/kern    469 - <https://www.kernel.org/pub/linux/utils/kernel/ksymoops/v2.4/>
480                                                   470 
481 Mkinitrd                                          471 Mkinitrd
482 --------                                          472 --------
483                                                   473 
484 - <https://code.launchpad.net/initrd-tools/mai    474 - <https://code.launchpad.net/initrd-tools/main>
485                                                   475 
486 E2fsprogs                                         476 E2fsprogs
487 ---------                                         477 ---------
488                                                   478 
489 - <https://www.kernel.org/pub/linux/kernel/peo    479 - <https://www.kernel.org/pub/linux/kernel/people/tytso/e2fsprogs/>
490 - <https://git.kernel.org/pub/scm/fs/ext2/e2fs    480 - <https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/>
491                                                   481 
492 JFSutils                                          482 JFSutils
493 --------                                          483 --------
494                                                   484 
495 - <https://jfs.sourceforge.net/>                  485 - <https://jfs.sourceforge.net/>
496                                                   486 
497 Reiserfsprogs                                     487 Reiserfsprogs
498 -------------                                     488 -------------
499                                                   489 
500 - <https://git.kernel.org/pub/scm/linux/kernel    490 - <https://git.kernel.org/pub/scm/linux/kernel/git/jeffm/reiserfsprogs.git/>
501                                                   491 
502 Xfsprogs                                          492 Xfsprogs
503 --------                                          493 --------
504                                                   494 
505 - <https://git.kernel.org/pub/scm/fs/xfs/xfspr    495 - <https://git.kernel.org/pub/scm/fs/xfs/xfsprogs-dev.git>
506 - <https://www.kernel.org/pub/linux/utils/fs/x    496 - <https://www.kernel.org/pub/linux/utils/fs/xfs/xfsprogs/>
507                                                   497 
508 Pcmciautils                                       498 Pcmciautils
509 -----------                                       499 -----------
510                                                   500 
511 - <https://www.kernel.org/pub/linux/utils/kern    501 - <https://www.kernel.org/pub/linux/utils/kernel/pcmcia/>
512                                                   502 
513 Quota-tools                                       503 Quota-tools
514 -----------                                       504 -----------
515                                                   505 
516 - <https://sourceforge.net/projects/linuxquota    506 - <https://sourceforge.net/projects/linuxquota/>
517                                                   507 
518                                                   508 
519 Intel P6 microcode                                509 Intel P6 microcode
520 ------------------                                510 ------------------
521                                                   511 
522 - <https://downloadcenter.intel.com/>             512 - <https://downloadcenter.intel.com/>
523                                                   513 
524 udev                                              514 udev
525 ----                                              515 ----
526                                                   516 
527 - <https://www.freedesktop.org/software/system    517 - <https://www.freedesktop.org/software/systemd/man/udev.html>
528                                                   518 
529 FUSE                                              519 FUSE
530 ----                                              520 ----
531                                                   521 
532 - <https://github.com/libfuse/libfuse/releases    522 - <https://github.com/libfuse/libfuse/releases>
533                                                   523 
534 mcelog                                            524 mcelog
535 ------                                            525 ------
536                                                   526 
537 - <https://www.mcelog.org/>                       527 - <https://www.mcelog.org/>
538                                                   528 
539 cpio                                              529 cpio
540 ----                                              530 ----
541                                                   531 
542 - <https://www.gnu.org/software/cpio/>            532 - <https://www.gnu.org/software/cpio/>
543                                                   533 
544 Networking                                        534 Networking
545 **********                                        535 **********
546                                                   536 
547 PPP                                               537 PPP
548 ---                                               538 ---
549                                                   539 
550 - <https://download.samba.org/pub/ppp/>           540 - <https://download.samba.org/pub/ppp/>
551 - <https://git.ozlabs.org/?p=ppp.git>             541 - <https://git.ozlabs.org/?p=ppp.git>
552 - <https://github.com/paulusmack/ppp/>            542 - <https://github.com/paulusmack/ppp/>
553                                                   543 
554 NFS-utils                                         544 NFS-utils
555 ---------                                         545 ---------
556                                                   546 
557 - <https://sourceforge.net/project/showfiles.p    547 - <https://sourceforge.net/project/showfiles.php?group_id=14>
558 - <https://nfs.sourceforge.net/>                  548 - <https://nfs.sourceforge.net/>
559                                                   549 
560 Iptables                                          550 Iptables
561 --------                                          551 --------
562                                                   552 
563 - <https://netfilter.org/projects/iptables/ind    553 - <https://netfilter.org/projects/iptables/index.html>
564                                                   554 
565 Ip-route2                                         555 Ip-route2
566 ---------                                         556 ---------
567                                                   557 
568 - <https://www.kernel.org/pub/linux/utils/net/    558 - <https://www.kernel.org/pub/linux/utils/net/iproute2/>
569                                                   559 
570 OProfile                                          560 OProfile
571 --------                                          561 --------
572                                                   562 
573 - <https://oprofile.sf.net/download/>             563 - <https://oprofile.sf.net/download/>
574                                                   564 
575 Kernel documentation                              565 Kernel documentation
576 ********************                              566 ********************
577                                                   567 
578 Sphinx                                            568 Sphinx
579 ------                                            569 ------
580                                                   570 
581 - <https://www.sphinx-doc.org/>                   571 - <https://www.sphinx-doc.org/>
                                                      

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