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1<?xml version="1.0" encoding="UTF-8"?> 1<?xml version="1.0" encoding="UTF-8"?>
2<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/gentoo-kernel.xml,v 1.39 2006/01/31 01:15:42 flammie Exp $ --> 2<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/gentoo-kernel.xml,v 1.48 2006/12/18 11:53:12 nightmorph Exp $ -->
3 3
4<!DOCTYPE guide SYSTEM "/dtd/guide.dtd"> 4<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
5<guide link="/doc/en/gentoo-kernel.xml"> 5<guide link="/doc/en/gentoo-kernel.xml">
6<title>Gentoo Linux Kernel Guide</title> 6<title>Gentoo Linux Kernel Guide</title>
7<author title="Author"> 7<author title="Author">
26 <mail link="greg_g@gentoo.org">Gregorio Guidi</mail> 26 <mail link="greg_g@gentoo.org">Gregorio Guidi</mail>
27</author> 27</author>
28<author title="Editor"> 28<author title="Editor">
29 <mail link="fox2mike@gentoo.org">Shyam Mani</mail> 29 <mail link="fox2mike@gentoo.org">Shyam Mani</mail>
30</author> 30</author>
31<author title="Editor">
32 <mail link="nightmorph@gentoo.org">Joshua Saddler</mail>
33</author>
31 34
32<abstract> 35<abstract>
33This document gives you an overview on all kernel sources that Gentoo 36This document gives you an overview on all kernel sources that Gentoo
34provides through Portage. 37provides through Portage.
35</abstract> 38</abstract>
36 39
37<!-- The content of this document is licensed under the CC-BY-SA license --> 40<!-- The content of this document is licensed under the CC-BY-SA license -->
38<!-- See http://creativecommons.org/licenses/by-sa/2.5 --> 41<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
39<license/> 42<license/>
40 43
41<version>1.13</version> 44<version>1.17</version>
42<date>2006-01-30</date> 45<date>2006-12-04</date>
43 46
44<chapter> 47<chapter>
45<title>Introduction</title> 48<title>Introduction</title>
46<section> 49<section>
47<body> 50<body>
54I will attempt to give you a brief rundown of the goals of each of the 57I will attempt to give you a brief rundown of the goals of each of the
55patch sets, which we at Gentoo design, and also explain the other kernel 58patch sets, which we at Gentoo design, and also explain the other kernel
56sources we make available to you. 59sources we make available to you.
57</p> 60</p>
58 61
62<p>
63Linux 2.4 is maintained by Willy Tarreau. Linus Torvalds, the original creator
64of Linux, handed maintainership of the Linux 2.4 branch over to Marcelo Tosatti
65when Linus went off to start developing the newer 2.6 kernel tree. Marcelo did a
66fine job of keeping 2.4 stable and secure, and has since handed over
67maintainership to Willy. Note that only security and bug fixes are accepted into
68the 2.4 kernel tree. Actual development happens in the Linux 2.6 kernel tree.
69</p>
70
71<p>
72Linux 2.6 is maintained by Andrew Morton, who works closely with Linus
73Torvalds to deliver a fast, powerful, and feature-packed Linux kernel.
74Development is happening at incredible pace and this kernel tree is now very
75mature.
76</p>
77
78<p>
79Some of the more uncommon system architectures are not fully compatible with
80Linux 2.6, and some users prefer the tried-and-tested Linux 2.4 kernel. However,
81please note that Linux 2.4 is currently not being developed further - only bug
82and security fixes are being included in the newer releases. If you are able to,
83we suggest that you upgrade to Linux 2.6. You may find the <uri
84link="/doc/en/migration-to-2.6.xml">migration document</uri> useful.
85</p>
86
59</body> 87</body>
60</section> 88</section>
61</chapter> 89</chapter>
62 90
63<chapter> 91<chapter>
89specifically using the 2.4 profile, <c>gentoo-sources</c> will be a 2.6 kernel 117specifically using the 2.4 profile, <c>gentoo-sources</c> will be a 2.6 kernel
90on <e>most</e> architectures. 118on <e>most</e> architectures.
91</p> 119</p>
92 120
93<p> 121<p>
94<c>gentoo-sources</c> is a kernel based on Linux 2.6, with various kernel 122<c>gentoo-sources</c> is a kernel based on Linux 2.6, lightly patched to fix
95patches included to fix security problems, kernel bugs, and to increase 123security problems, kernel bugs, and to increase compatibility with the more
96compatibility with the more uncommon system architectures. Linux 2.6 is 124uncommon system architectures. Linux 2.6 is the current official stable kernel
97the current official stable kernel tree, and development is progressing 125tree, and development is progressing rapidly. For highest performance, best
98rapidly. For highest performance, best hardware support, and its large 126hardware support, and its large new feature set, we recommend 2.6 over its older
99new feature set, we recommend 2.6 over its older 2.4 counterpart. 1272.4 counterpart.
100</p>
101
102<p> 128</p>
103Some of the more uncommon system architectures are not fully compatible with 129
104Linux 2.6, and some users prefer to the tried-and-tested Linux 2.4 kernel; 130<p>
105for this reason we provide <c>gentoo-sources</c> (the 2.4 version). The 131The 2.4 <c>gentoo-sources</c> kernel patches are similar to those included in
106patches included in this kernel are similar to those included in its 2.6
107counterpart, plus a number of patches designed to add functionality and 132its 2.6 counterpart, plus a number of patches designed to add functionality and
108improve performance. Linux 2.4 is currently not being developed further - only 133improve performance.
109bug and security fixes are being included in the newer releases. If you are
110able to, we suggest that you upgrade to Linux 2.6. You may find the
111<uri link="/doc/en/migration-to-2.6.xml">migration document</uri> useful.
112</p> 134</p>
113 135
114<p> 136<p>
115The <c>gentoo-sources</c> package absorbs most of the resources of the Gentoo 137The <c>gentoo-sources</c> package absorbs most of the resources of the Gentoo
116kernel team. They are brought to you by a group of talented developers, which 138kernel team. They are brought to you by a group of talented developers, which
119official Linux kernel. 141official Linux kernel.
120</p> 142</p>
121 143
122</body> 144</body>
123</section> 145</section>
124<section>
125<title>Plain kernels: vanilla-sources</title>
126<body>
127
128<p>
129The next kernel sources that many of you will probably be familiar with
130as Linux users are the <c>vanilla-sources</c>. These are the official kernel
131sources released on <uri>http://www.kernel.org/</uri>. Please note that we do
132not patch these kernels at all - these are purely for people who wish to run
133a completely unmodified Linux kernel.
134</p>
135
136<p>
137Similar to <c>gentoo-sources</c>, two versions of the kernel can be found
138under this package: 2.4 and 2.6.
139</p>
140
141<p>
142Linux 2.4 is maintained by Marcelo Tosatti. Linus Torvalds, the original
143creator of Linux, handed maintainership of the Linux 2.4 branch over to
144Marcelo when Linus went off to start developing the newer 2.6 kernel tree.
145Marcelo has done a fine job of keeping 2.4 stable and secure, and is now
146only accepting security and bug fixes into the 2.4 kernel tree. Actual
147development happens in the Linux 2.6 kernel tree.
148</p>
149
150<p>
151Linux 2.6 is maintained by Andrew Morton, who works closely with Linus
152Torvalds to deliver a fast, powerful, and feature-packed Linux kernel.
153Development is happening at incredible pace and this kernel tree is now very
154mature.
155</p>
156
157</body>
158</section>
159
160<section> 146<section>
161<title>For servers: hardened-sources and rsbac-sources</title> 147<title>For servers: hardened-sources and rsbac-sources</title>
162<body> 148<body>
163 149
164<p> 150<p>
189<section> 175<section>
190<title>Architecture dependent kernels</title> 176<title>Architecture dependent kernels</title>
191<body> 177<body>
192 178
193<p> 179<p>
194<c>alpha-sources</c>, <c>hppa-sources</c>,<c>mips-sources</c>, <c>sh-sources</c> 180<c>hppa-sources</c>, <c>mips-sources</c>, <c>sh-sources</c>,
195<c>sparc-sources</c> and <c>xbox-sources</c> are, as their names suggest, 181<c>sparc-sources</c>, and <c>xbox-sources</c> are, as their names suggest,
196patched to run best on specific architectures. They also contain some of the 182patched to run best on specific architectures. They also contain some of the
197patches for hardware and features support from the other patch sets mentioned 183patches for hardware and features support from the other patch sets mentioned
198above and below. 184above and below.
199</p> 185</p>
200 186
312</p> 298</p>
313 299
314</body> 300</body>
315</section> 301</section>
316<section> 302<section>
317<title>uclinux-sources</title>
318<body>
319
320<p>
321The <c>uclinux-sources</c> are meant for CPUs without MMUs as well as embedded
322devices. For more information, see <uri>http://www.uclinux.org</uri>.
323</p>
324
325</body>
326</section>
327<section>
328<title>usermode-sources</title> 303<title>usermode-sources</title>
329<body> 304<body>
330 305
331<p> 306<p>
332<c>usermode-sources</c> are the User Mode Linux kernel patches. This 307<c>usermode-sources</c> are the User Mode Linux kernel patches. This
341<uri link="/doc/en/uml.xml">Gentoo UML Guide</uri>. 316<uri link="/doc/en/uml.xml">Gentoo UML Guide</uri>.
342</p> 317</p>
343 318
344</body> 319</body>
345</section> 320</section>
321<section>
322<title>vanilla-sources</title>
323<body>
324
325<p>
326The next kernel sources that many of you will probably be familiar with as Linux
327users are the <c>vanilla-sources</c>. These are the official kernel sources
328released on <uri>http://www.kernel.org/</uri>. Please note that we do not patch
329these kernels at all - these are purely for people who wish to run a completely
330unmodified Linux kernel. We recommend that you use <c>gentoo-sources</c>
331instead.
332</p>
333
334<p>
335Similar to <c>gentoo-sources</c>, two versions of the kernel can be found
336under this package: 2.4 and 2.6.
337</p>
338
339</body>
340</section>
346</chapter> 341</chapter>
347 342
348<chapter> 343<chapter>
349<title>Previously provided kernel packages</title> 344<title>Previously provided kernel packages</title>
350<section> 345<section>
440</p> 435</p>
441 436
442</body> 437</body>
443</section> 438</section>
444<section> 439<section>
440<title>uclinux-sources</title>
441<body>
442
443<p>
444The <c>uclinux-sources</c> are meant for CPUs without MMUs as well as embedded
445devices. For more information, see <uri>http://www.uclinux.org</uri>. Lack of
446security patches as well as hardware to test on were the reasons this is no longer
447in the tree.
448</p>
449
450</body>
451</section>
452<section>
445<title>win4lin-sources</title> 453<title>win4lin-sources</title>
446<body> 454<body>
447 455
448<p> 456<p>
449<c>win4lin-sources</c> were patched to support the userland win4lin tools 457<c>win4lin-sources</c> were patched to support the userland win4lin tools

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