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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 1.8 2004/07/02 09:56:48 swift Exp $ --> 2<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/gentoo-kernel.xml,v 1.59 2010/04/18 04:30:46 nightmorph Exp $ -->
3
4<!DOCTYPE guide SYSTEM "/dtd/guide.dtd"> 3<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
5<guide link="/doc/en/gentoo-kernel.xml"> 4
5<guide>
6<title>Gentoo Linux Kernel Guide</title> 6<title>Gentoo Linux Kernel Guide</title>
7
7<author title="Author"> 8<author title="Author">
8 <mail link="swift@gentoo.org">Sven Vermeulen</mail> 9 <mail link="swift@gentoo.org">Sven Vermeulen</mail>
9</author> 10</author>
10<author title="Contributor"> 11<author title="Contributor">
11 <mail link="lostlogic@gentoo.org">Brandon Low</mail> 12 <mail link="lostlogic@gentoo.org">Brandon Low</mail>
12</author> 13</author>
13<author title="Editor"> 14<author title="Editor">
15 <mail link="dsd@gentoo.org">Daniel Drake</mail>
16</author>
17<author title="Editor">
14 <mail link="carl@gentoo.org">Carl Anderson</mail> 18 <mail link="carl@gentoo.org">Carl Anderson</mail>
15</author> 19</author>
16<author title="Editor"> 20<author title="Editor">
17 <mail link="peesh@gentoo.org">Jorge Paulo</mail> 21 <mail link="peesh@gentoo.org">Jorge Paulo</mail>
22</author>
23<author title="Editor">
24 <mail link="bennyc@gentoo.org">Benny Chuang</mail>
25</author>
26<author title="Editor">
27 <mail link="greg_g@gentoo.org">Gregorio Guidi</mail>
28</author>
29<author title="Editor">
30 <mail link="fox2mike@gentoo.org">Shyam Mani</mail>
31</author>
32<author title="Editor">
33 <mail link="nightmorph@gentoo.org">Joshua Saddler</mail>
18</author> 34</author>
19 35
20<abstract> 36<abstract>
21This document gives you an overview on all kernelsources that Gentoo 37This document gives you an overview on all kernel sources that Gentoo
22provides through Portage. 38provides through Portage.
23</abstract> 39</abstract>
24 40
41<!-- The content of this document is licensed under the CC-BY-SA license -->
42<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
25<license/> 43<license/>
26 44
27<version>0.4</version> 45<version>1.25</version>
28<date>July 02, 2004</date> 46<date>2010-04-17</date>
29 47
30<chapter> 48<chapter>
31<title>Introduction</title> 49<title>Introduction</title>
32<section> 50<section>
33<body> 51<body>
34 52
35<p> 53<p>
36As with everything else in Gentoo Linux, the philosophy of the Gentoo 54As with everything else in Gentoo Linux, the philosophy of the Gentoo
37Kernel team is to give you, the user, as much freedom of choice as 55Kernel team is to give you, the user, as much freedom of choice as
38possible. If you take a look at the output of <c>emerge -s sources</c> 56possible. If you take a look at the output of <c>emerge -s sources</c>
39you see a large variety of kernels to choose from. In this document, 57you see a large variety of kernels to choose from. In this document,
40I will attempt to give you a brief rundown of the goals of each of the 58I will attempt to give you a brief rundown of the goals of each of the
41patch sets, which we at Gentoo design, and also explain the other kernel 59patch sets, which we at Gentoo design, and also explain the other kernel
42sources we make available to you. 60sources we make available to you.
43</p> 61</p>
44 62
63<p>
64Linux 2.4 is maintained by Willy Tarreau. Linus Torvalds, the original creator
65of Linux, handed maintainership of the Linux 2.4 branch over to Marcelo Tosatti
66when Linus went off to start developing the newer 2.6 kernel tree. Marcelo did a
67fine job of keeping 2.4 stable and secure, and has since handed over
68maintainership to Willy. Note that only security and bug fixes are accepted into
69the 2.4 kernel tree. Actual development happens in the Linux 2.6 kernel tree.
70</p>
71
72<p>
73Linux 2.6 is maintained by Andrew Morton, who works closely with Linus
74Torvalds to deliver a fast, powerful, and feature-packed Linux kernel.
75Development is happening at incredible pace and this kernel tree is now very
76mature.
77</p>
78
79<p>
80Some of the more uncommon system architectures are not fully compatible with
81Linux 2.6, and some users prefer the tried-and-tested Linux 2.4 kernel. However,
82please note that Linux 2.4 is currently not being developed further - only bug
83and security fixes are being included in the newer releases. If you are able to,
84we suggest that you upgrade to Linux 2.6. You may find the <uri
85link="/doc/en/migration-to-2.6.xml">migration document</uri> useful.
86</p>
87
45</body> 88</body>
46</section> 89</section>
47</chapter> 90</chapter>
48 91
49<chapter> 92<chapter>
50<title>The Choices, Part I</title> 93<title>Supported kernel packages</title>
51<section>
52<title>gentoo-sources</title>
53<body>
54
55<p>
56For most users, the recommended kernel sources are the
57<c>gentoo-sources</c>. The <c>gentoo-sources</c> package contains
58specially tuned performance kernel patches designed to optimize tasks
59such as compiling while listening to music and browsing the web. Most
60of you who are new to Gentoo have probably never run a system where you
61are regularly compiling many packages from source while you are doing your
62normal everyday tasks on your computer.
63You may find that if you use the <c>vanilla-sources</c> (the official
64kernel sources released from <uri>http://www.kernel.org</uri>) normal tasks --
65such as listening to music, moving your mouse and the like -- may appear
66jumpy when you are compiling packages.
67</p>
68
69<p>
70The <c>gentoo-sources</c> contain an updated ACPI subsystem and are based
71on Con Kolivas' high-performance kernel patches (<c>ck-sources</c>). We also
72support grSecurity (a set of security-related patches with support for
73ACLs), EVMS(2) (a highly flexible storage management filesystem with easy
74partition resizing), JFS (IBM's high-performance filesystem), the latest
75NTFS drivers, and more.
76</p>
77
78<p>
79Because the <c>gentoo-sources</c> are targeted at full performance, they are
80also very good for gaming purposes.
81</p>
82
83</body>
84</section> 94<section>
95<title>genkernel</title>
96<body>
97
98<p>
99<c>Genkernel</c> is a kernel toolset that can be used to autodetect your
100hardware and configure your kernel automatically. This is usually recommended
101for users who do not feel comfortable about compiling a kernel manually.
102</p>
103
104<p>
105For more information, please read the <uri link="/doc/en/genkernel.xml">Gentoo
106Linux Genkernel Guide</uri>.
107</p>
108
109</body>
85<section> 110</section>
86<title>vanilla-sources</title>
87<body>
88
89<p>
90The next kernel sources that many of you will probably be familiar with
91as Linux users are the <c>vanilla-sources</c>. As I mentioned briefly
92above, these are the official 2.4 kernel sources released on
93<uri>http://www.kernel.org/</uri>. These sources are maintained (contrary
94to popular belief) not by Linus Torvalds himself, but by Marcelo
95Tosatti. Linus is the leader of active kernel development, but as he is
96only one man, he passes off the maintenance of the stable 2.4 kernel branch
97to someone he can trust to handle it once it has stabilized. Thus, Alan
98Cox became the maintainer of the Linux-2.2 kernel series and Marcelo
99Tosatti became the maintainer of the Linux-2.4 kernel series. This is
100what all the other patch sets in the 2.4 series are based on. Marcelo has
101been doing an outstanding job with its maintenance and it can be
102counted on for stability and up-to-date (if not bleeding edge) hardware
103support.
104</p>
105
106<p>
107<c>vanilla-sources</c> are probably the most stable sources available
108since they are the most tested and all possible kernel sources are based
109on them. If you don't need any of the extras that the other kernels supply
110then the <c>vanilla-sources</c> are your thing.
111</p>
112
113</body>
114</section> 111<section>
112<title>General purpose: gentoo-sources</title>
113<body>
114
115<p>
116For most users, we recommend the <c>gentoo-sources</c> kernel.
117<c>gentoo-sources</c> is a kernel based on Linux 2.6, lightly patched to fix
118security problems, kernel bugs, and to increase compatibility with the more
119uncommon system architectures.
120</p>
121
122<p>
123The <c>gentoo-sources</c> package absorbs most of the resources of the Gentoo
124kernel team. They are brought to you by a group of talented developers, which
125can count on the expertise of popular kernel hacker Greg Kroah-Hartman,
126maintainer of udev and responsible for the USB and PCI subsystems of the
127official Linux kernel.
128</p>
129
130</body>
115<section> 131</section>
116<title>development-sources</title>
117<body>
118
119<p>
120The <c>development-sources</c> ebuild provides the stable 2.6 Linux kernel.
121As opposed to what the name might suggest this kernel source is completely
122stable and production-ready.
123</p>
124
125</body>
126</section> 132<section>
127<section> 133<title>For servers: hardened-sources</title>
128<title>gs-sources</title>
129<body>
130
131<p>
132For users to whom desktop interactive performance comes as a secondary
133priority to reliability and hardware support, we have the
134<c>gs-sources</c>. GS stands for Gentoo Stable (creative, aren't we?).
135This patch set is tuned and tested to provide the best support for the
136latest hardware and ensures that your mission critical servers will be
137up when you need them. This kernel doesn't have some of the most
138aggressive performance tuning patches from the <c>gentoo-sources</c>,
139but rest assured, the great performance that you know and love from the
140vanilla kernels are alive and well. Where possible and without
141compromising stability we add server related performance patches.
142</p>
143
144<p>
145This kernel provides support for the latest ACPI subsystem, EVMS, ECC
146(required for HA Linux systems), Encrypted Loopback devices, NTFS, Win4Lin
147and XFS. It also contains updates for IDE, ext3 and several network cards
148amongst other patches.
149</p>
150
151<p>
152In other words, these sources are perfect for servers and
153High-Availability systems.
154</p>
155
156<p>
157The following USE-flags can be set to select optional patches:
158</p>
159
160<table>
161<tr><th>Flags</th><th>Description</th></tr>
162<tr><ti>crypt</ti><ti>Apply cryptographic patches</ti></tr>
163</table>
164
165</body> 134<body>
166</section>
167<section>
168<title>gentoo-test-sources</title>
169<body>
170 135
171<p>
172<c>gentoo-test-sources</c> are what will become <c>gentoo-sources</c> after
173lots of testing and QA. Patches to the <c>gentoo-sources</c> are first
174added to <c>gentoo-test-sources</c> for testing. So if you want the
175performance of <c>gentoo-sources</c> with the most recent possible
176patches, use <c>gentoo-test-sources</c>.
177</p> 136<p>
178 137<c>hardened-sources</c> is based on the official Linux kernel and is targeted at
179</body> 138our users running Gentoo on server systems. It provides patches for the various
180</section> 139subprojects of Gentoo Hardened (such as support for <uri
181<section> 140link="http://www.nsa.gov/selinux/">LSM/SELinux</uri> and <uri
182<title>hardened-sources</title> 141link="http://grsecurity.net">grsecurity</uri>), together with
183<body>
184
185<p>
186<c>hardened-sources</c> provides patches for the various subprojects of
187Gentoo Hardened (such as support for LSM/SELinux and GRSecurity), together
188with stability/security-enhancements. Check 142stability/security-enhancements. Check
189<uri>http://www.gentoo.org/proj/en/hardened/</uri> for more information. 143<uri>http://www.gentoo.org/proj/en/hardened/</uri> for more information.
190</p> 144</p>
191 145
192<p> 146<impo>
193The following USE-flags can be set to select optional patches: 147This kernel provides powerful patches for enhanced security. Please read the
194</p> 148<uri link="/proj/en/hardened/">documentation</uri> before you use it.
195 149</impo>
196<table>
197<tr><th>Flags</th><th>Description</th></tr>
198<tr><ti>selinux</ti><ti>Substitute grSecurity with SELinux support</ti></tr>
199</table>
200
201</body>
202</section>
203<section>
204<title>xfs-sources</title>
205<body>
206
207<p>
208<c>xfs-sources</c> contains support for EVMS, ACPI, grSecurity and, what
209you probably already figured out by now, the latest XFS support patches
210from the XFS Development. Please note that XFS support has been merged
211into the regular 2.4 kernel tree.
212</p>
213
214<p>
215More information about XFS on <uri>http://oss.sgi.com/projects/xfs/</uri>.
216</p>
217 150
218</body> 151</body>
219</section> 152</section>
220<section> 153<section>
221<title>Architecture dependent kernels</title> 154<title>Architecture dependent kernels</title>
222<body> 155<body>
223 156
224<p> 157<p>
225<c>alpha-sources</c>, <c>hppa-sources</c>, <c>ia64-sources</c>, 158<c>cell-sources</c>, <c>mips-sources</c>, <c>sparc-sources</c>, and
226<c>mips-sources</c>, <c>ppc-sources</c> and
227<c>sparc-sources</c> are, as their names suggest, patched to run best on 159<c>xbox-sources</c> are, as their names suggest, patched to run best on specific
228specific architectures. They also contain some of the patches for hardware and 160architectures. They also contain some of the patches for hardware and features
229features support from the other patch sets mentioned above and below. 161support from the other patch sets mentioned above and below.
230</p>
231
232</body>
233</section>
234<section>
235<title>ppc-sources-benh</title>
236<body>
237
238<p>
239The <c>ppc-sources-benh</c> ebuilds provide additional hardware
240support for the <c>ppc-sources</c> kernel. It is slightly more
241experimental than the <c>ppc-sources</c>.
242</p>
243
244</body>
245</section>
246<section>
247<title>ppc-sources-crypto</title>
248<body>
249
250<p>
251The <c>ppc-sources-crypto</c> ebuilds provide CryptoAPI
252support for the Gentoo Linux PPC Kernel.
253</p>
254
255</body>
256</section>
257<section>
258<title>ppc-sources-dev</title>
259<body>
260
261<p>
262The <c>ppc-sources-dev</c> packages provide the development sources for
263<c>ppc-sources</c>. Every patch which should become part of
264<c>ppc-sources</c> has to go through <c>ppc-sources-dev</c> first.
265</p>
266
267</body>
268</section>
269<section>
270<title>compaq-sources</title>
271<body>
272
273<p>
274The <c>compaq-sources</c> provide RedHat's kernel sources for Alpha,
275maintained by Compaq.
276</p> 162</p>
277 163
278</body> 164</body>
279</section> 165</section>
280</chapter> 166</chapter>
281 167
282<chapter> 168<chapter>
283<title>The Choices, Part II</title> 169<title>Unsupported kernel packages</title>
284<section> 170<section>
285<body> 171<body>
286 172
287<p> 173<p>
288Now I'm going to try to briefly describe some of the other 174Now I'm going to try to briefly describe some of the other
289<path>sys-kernel/*-sources</path> which you saw scroll by when you ran 175<path>sys-kernel/*-sources</path> which you saw scroll by when you ran
290<c>emerge -s sources</c>. Lets take them in alphabetical order. 176<c>emerge -s sources</c>. Lets take them in alphabetical order. These
177kernels are provided as a courtesy only and the various patch sets are not
178supported by the Gentoo team.
291</p> 179</p>
292 180
293</body> 181</body>
294</section>
295<section> 182</section>
296<title>aa-sources</title>
297<body>
298
299<p>
300First we have <c>aa-sources</c>. This is Andrea Arcangeli's patch set.
301Andrea is known as an amazing coder by many other kernel hackers. His
302kernel patch set has some of the most aggressively tuned VM (Virtual
303Memory) patches known to mankind. When I last looked, it also contained
304SGI's XFS filesystem and the O(1) scheduler by Ingo Molar (which is
305the default scheduler for Linux 2.6).
306</p>
307
308<p>
309It also provides User Mode Linux support (check out our
310<uri link="/doc/en/uml.xml">UML Guide</uri> for more information) and
311the latest TUX Webserver (an in-kernel webserver).
312</p>
313
314<p>
315If you have Memory Management troubles with other kernels,
316<c>aa-sources</c> can be your solution. If you want to optimize Linux's
317Memory Management for your system, <c>aa-sources</c> is <e>definitely</e>
318what you need.
319</p>
320
321<p>
322Visit
323<uri>http://www.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4</uri>
324for more information about all the patches in these kernel sources.
325</p>
326
327</body>
328</section> 183<section>
329<section>
330<title>ck-sources</title> 184<title>git-sources</title>
331<body>
332
333<p>
334<c>ck-sources</c> is Con Kolivas's kernel patch set. This kernel is
335<e>HIGHLY</e> tuned for desktop performance at the expense of
336throughput and some of the scheduler's ability to prioritize
337applications. Con Kolivas benchmarks kernels to find the best
338combination of features for desktop use. See
339<uri>http://kernel.kolivas.org</uri> for more information on Con and his
340patches.
341</p>
342
343</body> 185<body>
344</section>
345<section>
346<title>gaming-sources</title>
347<body>
348 186
349<p>
350<c>gaming-sources</c> are based on <c>ck-sources</c> and are therefore
351tuned for high performance. They also contain patches for the latest
352game-related hardware (graphic cards, sound cards, and such).
353</p> 187<p>
354 188The <c>git-sources</c> package tracks daily snapshots of the upstream
355<p> 189development kernel tree. You should run these kernels if you are interested in
356If you are a hardcore gamer, this is your choice. 190kernel development or testing. Bugreports should go to the <uri
357</p> 191link="http://bugzilla.kernel.org/">Linux Kernel Bug Tracker</uri> or LKML
358 192(Linux Kernel Mailing List).
359</body>
360</section>
361<section>
362<title>grsec-sources</title>
363<body>
364
365<p>
366The <c>grsec-sources</c> kernel source is patched with the latest GRSecurity
367updates (GRSecurity version 1.9 and up) which includes, amongst other
368security-related patches, support for PaX.
369</p> 193</p>
370 194
371</body> 195</body>
372</section> 196</section>
373<section> 197<section>
374<title>mm-sources</title> 198<title>mm-sources</title>
375<body> 199<body>
376 200
377<p> 201<p>
378The <c>mm-sources</c> are based on the <c>development-sources</c> and 202The <c>mm-sources</c> are based on the <c>vanilla-sources</c> and contain
379contain Andrew Morton's patch set. It assembles several other patches, 203Andrew Morton's patch set. They include the experimental and bleeding-edge
380like ext2/3 Extended Attributes and Access Control Lists, Page Table 204features that are going to be included in the official kernel (or that are
381Sharing, the Orlov Allocator, non-linear mapping behaviour, etc into one 205going to be rejected because they set your box on fire). They are known to be
382patch set. 206always moving at a fast pace and can change radically from one week to the
383</p> 207other; kernel hackers use them as a testing ground for new stuff.
384
385<p> 208</p>
209
210<p>
386If you really want to live on the edge and you think 211If you really want to live on the edge and you think
387<c>development-sources</c> are for wussies, then try out 212<c>vanilla-sources</c> are for wussies, then try out
388<c>mm-sources</c>. 213<c>mm-sources</c>. Be warned that this kernel is highly experimental and
214doesn't always work as expected.
389</p> 215</p>
390 216
391</body> 217</body>
392</section>
393<section> 218</section>
394<title>openmosix-sources</title>
395<body>
396
397<p>
398The <c>openmosix-sources</c> are patched to support the openMosix system
399(like MOSIX but Open Source). For more information see
400<uri>http://www.openmosix.org</uri>.
401</p>
402
403</body>
404</section> 219<section>
220<title>openvz-sources</title>
221<body>
222
223<p>
224OpenVZ is a server virtualization solution built on Linux. OpenVZ creates
225isolated, secure virtual private servers (VPSs) or virtual environments on a
226single physical server enabling better server utilization and ensuring that
227applications do not conflict. For more information, see
228<uri>http://www.openvz.org</uri>.
229</p>
230
231</body>
405<section> 232</section>
406<title>pac-sources</title>
407<body>
408
409<p>
410The <c>pac-sources</c> kernel tree is patched with Bernhard Rosenkraenzer's
411(bero) patches.
412</p>
413
414</body>
415</section> 233<section>
416<section>
417<title>planet-ccrma-sources</title> 234<title>tuxonice-sources</title>
418<body>
419
420<p>
421This kernel source contains the Linux Kernel source for the version of the
422Redhat Linux Kernel modified by the Planet CCRMA (custom audio upgrade) project.
423</p>
424
425<p>
426More information can be found at <uri>http://ccrma-www.stanford.edu/</uri>.
427</p>
428
429</body> 235<body>
430</section>
431<section>
432<title>selinux-sources</title>
433<body>
434 236
237<p>
238The <c>tuxonice-sources</c> (formerly <c>suspend2-sources</c>) are patched with
239both genpatches which includes the patches found in gentoo-sources, and <uri
240link="http://www.tuxonice.net">TuxOnIce</uri> which is an improved
241implementation of suspend-to-disk for the Linux kernel, formerly known as
242<e>suspend2</e>.
435<p> 243</p>
436<c>selinux-sources</c> from <uri>http://www.nsa.gov/selinux</uri> are 244
437patches for the security conscious to support the LSM (Linux Security 245<p>
438Modules) and the Flask Security Architecture. 246This kernel is recommended for laptop users who often rely on being able
247to suspend their laptop and resume work elsewhere.
439</p> 248</p>
440 249
441</body> 250</body>
442</section> 251</section>
443<section> 252<section>
444<title>usermode-sources</title> 253<title>usermode-sources</title>
445<body> 254<body>
446 255
447<p> 256<p>
448<c>usermode-sources</c> are the User Mode Linux kernel patches. This 257<c>usermode-sources</c> are the User Mode Linux kernel patches. This
449kernel is designed to allow Linux to run within Linux to run within Linux 258kernel is designed to allow Linux to run within Linux to run within Linux
450to ... User Mode Linux is intended for testing and virtual server support. 259to ... User Mode Linux is intended for testing and virtual server support.
451For more information about this amazing tribute to the stability and 260For more information about this amazing tribute to the stability and
452scalability of Linux, see <uri>http://user-mode-linux.sourceforge.net</uri>. 261scalability of Linux, see <uri>http://user-mode-linux.sourceforge.net</uri>.
453</p>
454
455<p> 262</p>
263
264<p>
456For more information on UML and Gentoo, read the 265For more information on UML and Gentoo, read the
457<uri link="/doc/en/uml.xml">Gentoo UML Guide</uri>. 266<uri link="/doc/en/uml.xml">Gentoo UML Guide</uri>.
458</p> 267</p>
459 268
460</body> 269</body>
461</section> 270</section>
462<section> 271<section>
272<title>vanilla-sources</title>
273<body>
274
275<p>
276The next kernel sources that many of you will probably be familiar with as Linux
277users are the <c>vanilla-sources</c>. These are the official kernel sources
278released on <uri>http://www.kernel.org/</uri>. Please note that we do not patch
279these kernels at all - these are purely for people who wish to run a completely
280unmodified Linux kernel. We recommend that you use <c>gentoo-sources</c>
281instead.
282</p>
283
284<p>
285Two versions of the kernel can be found under this package: 2.4 and 2.6.
286</p>
287
288</body>
289</section>
290<section>
291<title>zen-sources</title>
292<body>
293
294<p>
295<c>zen-sources</c> is designed for desktop systems. It includes code not found
296in the mainline kernel. The zen kernel has patches that add new features,
297support additional hardware, and contain various tweaks for desktops.
298</p>
299
300</body>
301</section>
302<section>
303<title>ck-sources</title>
304<body>
305
306<p>
307<c>ck-sources</c> is Con Kolivas's kernel patch set. This patchset is primarily
308designed to improve system responsiveness and interactivity and is configurable
309for varying workloads (from servers to desktops). The patchset includes a
310different scheduler, BFS, designed to keep systems responsive and smooth even
311when under heavy load. Support and information is available at
312<uri>http://kernel.kolivas.org</uri> and in <c>#ck</c> on <c>irc.oftc.net</c>.
313</p>
314
315</body>
316</section>
317</chapter>
318
319<chapter>
320<title>Previously provided kernel packages</title>
321<section>
322<title>aa-sources</title>
323<body>
324
325<p>
326<c>aa-sources</c> was a heavily modified kernel with all kinds of patches.
327The upstream maintainer has stopped releasing kernel patchsets, this package
328was removed as it went out of date.
329</p>
330
331</body>
332</section>
333<section>
334<title>alpha-sources</title>
335<body>
336
337<p>
338<c>alpha-sources</c> was a 2.4 kernel with patches applied to improve hardware
339compatibility for the Alpha architecture. These patches have been developed
340and included in the mainline kernel. Alpha users can now run any recent kernel
341with no need for extra patches.
342</p>
343
344</body>
345</section>
346<section>
347<title>development-sources</title>
348<body>
349
350<p>
351<c>development-sources</c>, the official 2.6 kernel from kernel.org, can now
352be found under the <c>vanilla-sources</c> package.
353</p>
354
355</body>
356</section>
357<section>
358<title>gentoo-dev-sources</title>
359<body>
360
361<p>
362<c>gentoo-dev-sources</c>, a 2.6 kernel patched with bug, security and
363stability fixes, can now be found under the <c>gentoo-sources</c> package.
364</p>
365
366</body>
367</section>
368<section>
369<title>grsec-sources</title>
370<body>
371
372<p>
373The <c>grsec-sources</c> kernel source used to be patched with the latest
374grsecurity updates (grsecurity version 2.0 and up) which included, amongst
375other security-related patches, support for PaX. As grsecurity patches are
376included in <c>hardened-sources</c>, this package is no longer in Portage.
377</p>
378
379</body>
380</section>
381<section>
382<title>hardened-dev-sources</title>
383<body>
384
385<p>
386<c>hardened-dev-sources</c> can now be found under the <c>hardened-sources</c>
387package.
388</p>
389
390</body>
391</section>
392<section>
393<title>hppa-sources</title>
394<body>
395
396<p>
397<c>hppa-sources</c> was a 2.6 kernel with patches applied to improve hardware
398compatibility for the HPPA architecture. These patches have been developed
399and included in the mainline kernel. HPPA users can now run any recent kernel
400with no need for extra patches.
401</p>
402
403</body>
404</section>
405<section>
406<title>rsbac-dev-sources</title>
407<body>
408
409<p>
410The <c>rsbac-dev-sources</c> kernels can now be found under the
411<c>rsbac-sources</c> package.
412</p>
413
414</body>
415</section>
416<section>
417<title>rsbac-sources</title>
418<body>
419
420<p>
421<c>rsbac-sources</c> was a 2.6-based kernel. It contained patches to use Rule
422Set Based Access Controls (<uri link="http://www.rsbac.org">RSBAC</uri>). It has
423been removed due to lack of maintainers. Use <c>hardened-sources</c> if you need
424additional security features.
425</p>
426
427</body>
428</section>
429<section>
430<title>selinux-sources</title>
431<body>
432
433<p>
434<c>selinux-sources</c>, a 2.4 kernel including lots of security enhancements,
435has been obsoleted by security development in the 2.6 tree. SELinux
436functionality can be found in the <c>hardened-sources</c> package.
437</p>
438
439</body>
440</section>
441<section>
442<title>sh-sources</title>
443<body>
444
445<p>
446<c>sh-sources</c> was a 2.6 kernel with patches applied to improve hardware
447compatibility for the SuperH architecture. These patches have been developed
448and included in the mainline kernel. SuperH users can now run any recent kernel
449with no need for extra patches.
450</p>
451
452</body>
453</section>
454<section>
455<title>uclinux-sources</title>
456<body>
457
458<p>
459The <c>uclinux-sources</c> are meant for CPUs without MMUs as well as embedded
460devices. For more information, see <uri>http://www.uclinux.org</uri>. Lack of
461security patches as well as hardware to test on were the reasons this is no
462longer in the tree.
463</p>
464
465</body>
466</section>
467<section>
463<title>win4lin-sources</title> 468<title>win4lin-sources</title>
464<body> 469<body>
465 470
466<p> 471<p>
467<c>win4lin-sources</c> are patched to support the userland win4lin tools 472<c>win4lin-sources</c> were patched to support the userland win4lin tools
468that allow Linux users to run many Microsoft Windows (TM) applications 473that allow Linux users to run many Microsoft Windows (TM) applications
469at almost native speeds. See <uri>http://www.netraverse.com/</uri> for more 474at almost native speeds. This was removed due to security issues.
470information.
471</p>
472
473</body>
474</section>
475<section>
476<title>wolk-sources</title>
477<body>
478
479<p>
480<c>wolk-sources</c> contains the <e>Working Overloaded Linux Kernel</e> from
481<uri>http://sourceforge.net/projects/wolk</uri>. This kernel contains
482many patches of a wide variety, all combined into the kernel with
483extreme care. This allows you to configure nearly every one into and out
484of the kernel at compile time -- so the kernel will work with nearly any
485combination of the patches.
486</p>
487
488<p>
489If you need a certain combination of patches that you cannot find in other
490kernel sources, WOLK is definitely worth a shot.
491</p> 475</p>
492 476
493</body> 477</body>
494</section> 478</section>
495</chapter> 479</chapter>

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