aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation/Changes
blob: 07c75d18154e7608f9368caaf6fbbca2baa6aafd (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
Intro
=====

This document is designed to provide a list of the minimum levels of
software necessary to run the 3.0 kernels.

This document is originally based on my "Changes" file for 2.0.x kernels
and therefore owes credit to the same people as that file (Jared Mauch,
Axel Boldt, Alessandro Sigala, and countless other users all over the
'net).

Current Minimal Requirements
============================

Upgrade to at *least* these software revisions before thinking you've
encountered a bug!  If you're unsure what version you're currently
running, the suggested command should tell you.

Again, keep in mind that this list assumes you are already functionally
running a Linux kernel.  Also, not all tools are necessary on all
systems; obviously, if you don't have any ISDN hardware, for example,
you probably needn't concern yourself with isdn4k-utils.

o  Gnu C                  3.2                     # gcc --version
o  Gnu make               3.80                    # make --version
o  binutils               2.12                    # ld -v
o  util-linux             2.10o                   # fdformat --version
o  module-init-tools      0.9.10                  # depmod -V
o  e2fsprogs              1.41.4                  # e2fsck -V
o  jfsutils               1.1.3                   # fsck.jfs -V
o  reiserfsprogs          3.6.3                   # reiserfsck -V
o  xfsprogs               2.6.0                   # xfs_db -V
o  squashfs-tools         4.0                     # mksquashfs -version
o  btrfs-progs            0.18                    # btrfsck
o  pcmciautils            004                     # pccardctl -V
o  quota-tools            3.09                    # quota -V
o  PPP                    2.4.0                   # pppd --version
o  isdn4k-utils           3.1pre1                 # isdnctrl 2>&1|grep version
o  nfs-utils              1.0.5                   # showmount --version
o  procps                 3.2.0                   # ps --version
o  oprofile               0.9                     # oprofiled --version
o  udev                   081                     # udevd --version
o  grub                   0.93                    # grub --version || grub-install --version
o  mcelog                 0.6                     # mcelog --version
o  iptables               1.4.2                   # iptables -V


Kernel compilation
==================

GCC
---

The gcc version requirements may vary depending on the type of CPU in your
computer.

Make
----

You will need Gnu make 3.80 or later to build the kernel.

Binutils
--------

Linux on IA-32 has recently switched from using as86 to using gas for
assembling the 16-bit boot code, removing the need for as86 to compile
your kernel.  This change does, however, mean that you need a recent
release of binutils.

Perl
----

You will need perl 5 and the following modules: Getopt::Long, Getopt::Std,
File::Basename, and File::Find to build the kernel.


System utilities
================

Architectural changes
---------------------

DevFS has been obsoleted in favour of udev
(http://www.kernel.org/pub/linux/utils/kernel/hotplug/)

32-bit UID support is now in place.  Have fun!

Linux documentation for functions is transitioning to inline
documentation via specially-formatted comments near their
definitions in the source.  These comments can be combined with the
SGML templates in the Documentation/DocBook directory to make DocBook
files, which can then be converted by DocBook stylesheets to PostScript,
HTML, PDF files, and several other formats.  In order to convert from
DocBook format to a format of your choice, you'll need to install Jade as
well as the desired DocBook stylesheets.

Util-linux
----------

New versions of util-linux provide *fdisk support for larger disks,
support new options to mount, recognize more supported partition
types, have a fdformat which works with 2.4 kernels, and similar goodies.
You'll probably want to upgrade.

Ksymoops
--------

If the unthinkable happens and your kernel oopses, you may need the
ksymoops tool to decode it, but in most cases you don't.
It is generally preferred to build the kernel with CONFIG_KALLSYMS so
that it produces readable dumps that can be used as-is (this also
produces better output than ksymoops).  If for some reason your kernel
is not build with CONFIG_KALLSYMS and you have no way to rebuild and
reproduce the Oops with that option, then you can still decode that Oops
with ksymoops.

Module-Init-Tools
-----------------

A new module loader is now in the kernel that requires module-init-tools
to use.  It is backward compatible with the 2.4.x series kernels.

Mkinitrd
--------

These changes to the /lib/modules file tree layout also require that
mkinitrd be upgraded.

E2fsprogs
---------

The latest version of e2fsprogs fixes several bugs in fsck and
debugfs.  Obviously, it's a good idea to upgrade.

JFSutils
--------

The jfsutils package contains the utilities for the file system.
The following utilities are available:
o fsck.jfs - initiate replay of the transaction log, and check
  and repair a JFS formatted partition.
o mkfs.jfs - create a JFS formatted partition.
o other file system utilities are also available in this package.

Reiserfsprogs
-------------

The reiserfsprogs package should be used for reiserfs-3.6.x
(Linux kernels 2.4.x). It is a combined package and contains working
versions of mkreiserfs, resize_reiserfs, debugreiserfs and
reiserfsck. These utils work on both i386 and alpha platforms.

Xfsprogs
--------

The latest version of xfsprogs contains mkfs.xfs, xfs_db, and the
xfs_repair utilities, among others, for the XFS filesystem.  It is
architecture independent and any version from 2.0.0 onward should
work correctly with this version of the XFS kernel code (2.6.0 or
later is recommended, due to some significant improvements).

PCMCIAutils
-----------

PCMCIAutils replaces pcmcia-cs (see below). It properly sets up
PCMCIA sockets at system startup and loads the appropriate modules
for 16-bit PCMCIA devices if the kernel is modularized and the hotplug
subsystem is used.

Pcmcia-cs
---------

PCMCIA (PC Card) support is now partially implemented in the main
kernel source. The "pcmciautils" package (see above) replaces pcmcia-cs
for newest kernels.

Quota-tools
-----------

Support for 32 bit uid's and gid's is required if you want to use
the newer version 2 quota format.  Quota-tools version 3.07 and
newer has this support.  Use the recommended version or newer
from the table above.

Intel IA32 microcode
--------------------

A driver has been added to allow updating of Intel IA32 microcode,
accessible as a normal (misc) character device.  If you are not using
udev you may need to:

mkdir /dev/cpu
mknod /dev/cpu/microcode c 10 184
chmod 0644 /dev/cpu/microcode

as root before you can use this.  You'll probably also want to
get the user-space microcode_ctl utility to use with this.

udev
----
udev is a userspace application for populating /dev dynamically with
only entries for devices actually present.  udev replaces the basic
functionality of devfs, while allowing persistent device naming for
devices.

FUSE
----

Needs libfuse 2.4.0 or later.  Absolute minimum is 2.3.0 but mount
options 'direct_io' and 'kernel_cache' won't work.

Networking
==========

General changes
---------------

If you have advanced network configuration needs, you should probably
consider using the network tools from ip-route2.

Packet Filter / NAT
-------------------
The packet filtering and NAT code uses the same tools like the previous 2.4.x
kernel series (iptables).  It still includes backwards-compatibility modules
for 2.2.x-style ipchains and 2.0.x-style ipfwadm.

PPP
---

The PPP driver has been restructured to support multilink and to
enable it to operate over diverse media layers.  If you use PPP,
upgrade pppd to at least 2.4.0.

If you are not using udev, you must have the device file /dev/ppp
which can be made by:

mknod /dev/ppp c 108 0

as root.

Isdn4k-utils
------------

Due to changes in the length of the phone number field, isdn4k-utils
needs to be recompiled or (preferably) upgraded.

NFS-utils
---------

In ancient (2.4 and earlier) kernels, the nfs server needed to know
about any client that expected to be able to access files via NFS.  This
information would be given to the kernel by "mountd" when the client
mounted the filesystem, or by "exportfs" at system startup.  exportfs
would take information about active clients from /var/lib/nfs/rmtab.

This approach is quite fragile as it depends on rmtab being correct
which is not always easy, particularly when trying to implement
fail-over.  Even when the system is working well, rmtab suffers from
getting lots of old entries that never get removed.

With modern kernels we have the option of having the kernel tell mountd
when it gets a request from an unknown host, and mountd can give
appropriate export information to the kernel.  This removes the
dependency on rmtab and means that the kernel only needs to know about
currently active clients.

To enable this new functionality, you need to:

  mount -t nfsd nfsd /proc/fs/nfsd

before running exportfs or mountd.  It is recommended that all NFS
services be protected from the internet-at-large by a firewall where
that is possible.

mcelog
------

In Linux 2.6.31+ the i386 kernel needs to run the mcelog utility
as a regular cronjob similar to the x86-64 kernel to process and log
machine check events when CONFIG_X86_NEW_MCE is enabled. Machine check
events are errors reported by the CPU. Processing them is strongly encouraged.
All x86-64 kernels since 2.6.4 require the mcelog utility to
process machine checks.

Getting updated software
========================

Kernel compilation
******************

gcc
---
o  <ftp://ftp.gnu.org/gnu/gcc/>

Make
----
o  <ftp://ftp.gnu.org/gnu/make/>

Binutils
--------
o  <ftp://ftp.kernel.org/pub/linux/devel/binutils/>

System utilities
****************

Util-linux
----------
o  <ftp://ftp.kernel.org/pub/linux/utils/util-linux/>

Ksymoops
--------
o  <ftp://ftp.kernel.org/pub/linux/utils/kernel/ksymoops/v2.4/>

Module-Init-Tools
-----------------
o  <ftp://ftp.kernel.org/pub/linux/kernel/people/rusty/modules/>

Mkinitrd
--------
o  <https://code.launchpad.net/initrd-tools/main>

E2fsprogs
---------
o  <http://prdownloads.sourceforge.net/e2fsprogs/e2fsprogs-1.29.tar.gz>

JFSutils
--------
o  <http://jfs.sourceforge.net/>

Reiserfsprogs
-------------
o  <http://www.kernel.org/pub/linux/utils/fs/reiserfs/>

Xfsprogs
--------
o  <ftp://oss.sgi.com/projects/xfs/>

Pcmciautils
-----------
o  <ftp://ftp.kernel.org/pub/linux/utils/kernel/pcmcia/>

Pcmcia-cs
---------
o  <http://pcmcia-cs.sourceforge.net/>

Quota-tools
----------
o  <http://sourceforge.net/projects/linuxquota/>

DocBook Stylesheets
-------------------
o  <http://nwalsh.com/docbook/dsssl/>

XMLTO XSLT Frontend
-------------------
o  <http://cyberelk.net/tim/xmlto/>

Intel P6 microcode
------------------
o  <http://www.urbanmyth.org/microcode/>

udev
----
o <http://www.kernel.org/pub/linux/utils/kernel/hotplug/udev.html>

FUSE
----
o <http://sourceforge.net/projects/fuse>

mcelog
------
o <ftp://ftp.kernel.org/pub/linux/utils/cpu/mce/>

Networking
**********

PPP
---
o  <ftp://ftp.samba.org/pub/ppp/>

Isdn4k-utils
------------
o  <ftp://ftp.isdn4linux.de/pub/isdn4linux/utils/>

NFS-utils
---------
o  <http://sourceforge.net/project/showfiles.php?group_id=14>

Iptables
--------
o  <http://www.iptables.org/downloads.html>

Ip-route2
---------
o  <ftp://ftp.tux.org/pub/net/ip-routing/iproute2-2.2.4-now-ss991023.tar.gz>

OProfile
--------
o  <http://oprofile.sf.net/download/>

NFS-Utils
---------
o  <http://nfs.sourceforge.net/>