doc/en/gentoo-kernel.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/gentoo-kernel.xml,v 1.12 2004/08/01 15:01:17 cam Exp $ -->

<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
<guide link="/doc/en/gentoo-kernel.xml">
<title>Gentoo Linux Kernel Guide</title>
<author title="Author">
    <mail link="swift@gentoo.org">Sven Vermeulen</mail>
</author>
<author title="Contributor">
    <mail link="lostlogic@gentoo.org">Brandon Low</mail>
</author>
<author title="Editor">
    <mail link="carl@gentoo.org">Carl Anderson</mail>
</author>
<author title="Editor">
    <mail link="peesh@gentoo.org">Jorge Paulo</mail>
</author>
<author title="Editor">
  <mail link="bennyc@gentoo.org">Benny Chuang</mail>
</author>
<author title="Editor">
  <mail link="g.guidi@sns.it">Gregorio Guidi</mail>
</author>

<abstract>
This document gives you an overview on all kernel sources that Gentoo
provides through Portage.
</abstract>

<license/>

<version>0.7.1</version>
<date>August 2, 2004</date>

<chapter>
<title>Introduction</title>
<section>
<body>

<p>
As with everything else in Gentoo Linux, the philosophy of the Gentoo 
Kernel team is to give you, the user, as much freedom of choice as 
possible.  If you take a look at the output of <c>emerge -s sources</c> 
you see a large variety of kernels to choose from.  In this document, 
I will attempt to give you a brief rundown of the goals of each of the 
patch sets, which we at Gentoo design, and also explain the other kernel
sources we make available to you.
</p>

</body>
</section>
</chapter>

<chapter>
<title>The Choices, Part I</title>
<section>
<title>genkernel</title>
<body>

<p>
<c>Genkernel</c> is a kernel toolset that can be used to autodetect your
hardware and configure your kernel automatically. This is usually recommended
for users who do not feel comfortable about compiling a kernel manually.
</p>

<p>
For more information, please read the <uri link="/doc/en/genkernel.xml">Gentoo
Linux Genkernel Guide</uri>.
</p>

</body>
</section>
<section>
<title>gentoo-sources</title>
<body>

<p>
For most users, the recommended kernel sources are the 
<c>gentoo-sources</c>. The <c>gentoo-sources</c> package contains various
kernel patches, designed to improve user experience with respect to different
areas. Speaking of <e>security</e>: you can find support for
<uri link="http://www.grsecurity.net">grsecurity</uri>, together with other
security enhancements and, naturally, all the recent fixes for known
vulnerabilities. The included patches deal also with <e>performance</e>
(including tweaks for desktop usage and support for recent hardware) and
<e>features</e> (supermount, bootsplash, the latest NTFS drivers, and more).
</p>

<p>
The <c>gentoo-sources</c> (together with <c>gentoo-dev-sources</c>) absorb
most of the resources of the Gentoo kernel team. They are brought to you by a
group of talented developers, which can count on the expertise of popular
kernel hacker Greg Kroah-Hartman, maintainer of udev and responsible for the
USB and PCI subsystems of the official linux kernel.
</p>

</body>
</section>
<section>
<title>vanilla-sources</title>
<body>

<p>
The next kernel sources that many of you will probably be familiar with 
as Linux users are the <c>vanilla-sources</c>. These are the official 2.4
kernel sources released on <uri>http://www.kernel.org/</uri>, maintained
(contrary to popular belief) not by Linus Torvalds himself, but by Marcelo
Tosatti. Linus is the leader of active kernel development, but as he is
only one man, he passes off the maintenance of the stable 2.4 kernel branch
to someone he can trust to handle it once it has stabilized.  Thus, Alan
Cox became the maintainer of the Linux-2.2 kernel series and Marcelo 
Tosatti became the maintainer of the Linux-2.4 kernel series. This is 
what all the other patch sets in the 2.4 series are based on. Marcelo has
been doing an outstanding job with its maintenance and it can be 
counted on for stability and up-to-date (if not bleeding edge) hardware
support.
</p>

<p>
<c>vanilla-sources</c> are probably the most stable sources available
since they are the most tested and all possible kernel sources are based 
on them. If you don't need any of the extras that the other kernels supply 
then the <c>vanilla-sources</c> are your thing.
</p>

</body>
</section>
<section>
<title>gentoo-dev-sources</title>
<body>

<p>
The <c>gentoo-dev-sources</c> ebuild includes the most up-to-date 2.6 kernel
with Gentoo's optimized performance patches.
</p>

</body>
</section>
<section>
<title>development-sources</title>
<body>

<p>
The <c>development-sources</c> ebuild provides the stable 2.6 Linux kernel.  As
opposed to what the name might suggest, this kernel source is completely stable
and production-ready. This is the official 2.6 kernel released on
<uri>http://www.kernel.org/</uri>.
</p>

</body>
</section>
<section>
<title>gs-sources</title>
<body>

<p>
For users to whom desktop interactive performance comes as a secondary 
priority to reliability and hardware support, we have the 
<c>gs-sources</c>.  GS stands for Gentoo Stable (creative, aren't we?).  
This patch set is tuned and tested to provide the best support for the 
latest hardware and ensures that your mission critical servers will be 
up when you need them.  This kernel doesn't have some of the most 
aggressive performance tuning patches from the <c>gentoo-sources</c>, 
but rest assured, the great performance that you know and love from the
vanilla kernels are alive and well. Where possible and without 
compromising stability we add server related performance patches.
</p>

<p>
This kernel provides support for the latest ACPI subsystem, EVMS, ECC
(required for HA Linux systems), Encrypted Loopback devices, NTFS, Win4Lin
and XFS. It also contains updates for IDE, ext3 and several network cards
amongst other patches.
</p>

<p>
In other words, these sources are perfect for servers and
High-Availability systems.
</p>

<p>
The following USE-flags can be set to select optional patches:
</p>

<table>
<tr><th>Flags</th><th>Description</th></tr>
<tr><ti>crypt</ti><ti>Apply cryptographic patches</ti></tr>
</table>

</body>
</section>
<section>
<title>hardened-sources</title>
<body>

<p>
<c>hardened-sources</c> provides patches for the various subprojects of
Gentoo Hardened (such as support for LSM/SELinux and GRSecurity), together 
with stability/security-enhancements. Check 
<uri>http://www.gentoo.org/proj/en/hardened/</uri> for more information.
</p>

<p>
The following USE-flags can be set to select optional patches:
</p>

<table>
<tr><th>Flags</th><th>Description</th></tr>
<tr><ti>selinux</ti><ti>Substitute grSecurity with SELinux support</ti></tr>
</table>

</body>
</section>
<section>
<title>hardened-dev-sources</title>
<body>

<p>
<c>hardened-dev-sources</c> use the 2.6 kernel with the patches provided by the
various subprojects of Gentoo Hardened.
</p>

</body>
</section>
<section>
<title>Architecture dependent kernels</title>
<body>

<p>
<c>alpha-sources</c>, <c>hppa-sources</c>, <c>hppa-dev-sources</c>,
<c>ia64-sources</c>, <c>mips-sources</c>, <c>ppc-sources</c>,
<c>pegasos-sources</c>, <c>pegasos-dev-sources</c>, <c>sparc-sources</c>
and <c>xbox-sources</c> are, as their names suggest, patched to run best on 
specific architectures.  They also contain some of the patches for hardware and 
features support from the other patch sets mentioned above and below. Kernel
sources that contains a "-dev-" means that the sources use the 2.6 kernel
instead of the 2.4 kernel.
</p>

<p>
The <c>compaq-sources</c> provide RedHat's kernel sources for Alpha, 
maintained by Compaq.
</p>

</body>
</section>
</chapter>

<chapter>
<title>The Choices, Part II</title>
<section>
<body>

<p>
Now I'm going to try to briefly describe some of the other 
<path>sys-kernel/*-sources</path> which you saw scroll by when you ran 
<c>emerge -s sources</c>. Lets take them in alphabetical order.  
</p>

</body>
</section>
<section>
<title>aa-sources</title>
<body>

<p>
First we have <c>aa-sources</c>. This is Andrea Arcangeli's patch set.  
Andrea is known as an amazing coder by many other kernel hackers.  His 
kernel patch set has some of the most aggressively tuned VM (Virtual 
Memory) patches known to mankind.
</p>

<p>
It also provides User Mode Linux support (check out our 
<uri link="/doc/en/uml.xml">UML Guide</uri> for more information) and 
the latest TUX Webserver (an in-kernel webserver).
</p>

<p>
If you have Memory Management troubles with other kernels, 
<c>aa-sources</c> can be your solution. If you want to optimize Linux's
Memory Management for your system, <c>aa-sources</c> is <e>definitely</e>
what you need.
</p>

<p>
Visit 
<uri>http://www.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.6</uri>
for more information about all the patches in these kernel sources.
</p>

</body>
</section>
<section>
<title>ck-sources</title>
<body>

<p>
<c>ck-sources</c> is Con Kolivas's kernel patch set.  This kernel is 
<e>HIGHLY</e> tuned for desktop performance at the expense of 
throughput and some of the scheduler's ability to prioritize 
applications.  Con Kolivas benchmarks kernels to find the best 
combination of features for desktop use.  See 
<uri>http://kernel.kolivas.org</uri> for more information on Con and his
patches.
</p>

</body>
</section>
<section>
<title>grsec-sources</title>
<body>

<p>
The <c>grsec-sources</c> kernel source is patched with the latest GRSecurity
updates (GRSecurity version 2.0 and up) which includes, amongst other
security-related patches, support for PaX.
</p>

</body>
</section>
<section>
<title>mm-sources</title>
<body>

<p>
The <c>mm-sources</c> are based on the <c>development-sources</c> and contain
Andrew Morton's patch set. They include the experimental and bleeding-edge
features that are going to be included in the official kernel (or that are
going to be rejected because they set your box on fire). They are known to be
always moving at a fast pace and can change radically from one week to the
other; kernel hackers use them as a testing ground for new stuff.
</p>

<p>
If you really want to live on the edge and you think 
<c>development-sources</c> are for wussies, then try out
<c>mm-sources</c>.
</p>

</body>
</section>
<section>
<title>openmosix-sources</title>
<body>

<p>
The <c>openmosix-sources</c> are patched to support the openMosix system 
(like MOSIX but Open Source).  For more information see 
<uri>http://www.openmosix.org</uri>.
</p>

</body>
</section>
<section>
<title>pac-sources</title>
<body>

<p>
The <c>pac-sources</c> kernel tree is patched with Bernhard Rosenkraenzer's
(bero) patches.
</p>

</body>
</section>
<section>
<title>planet-ccrma-sources</title>
<body>

<p>
This kernel source contains the Linux Kernel source for the version of the
Redhat Linux Kernel modified by the Planet CCRMA (custom audio upgrade) project.
</p>

<p>
More information can be found at <uri>http://ccrma-www.stanford.edu/</uri>.
</p>

</body>
</section>
<section>
<title>selinux-sources</title>
<body>

<p>
<c>selinux-sources</c> from <uri>http://www.nsa.gov/selinux</uri> are 
patches for the security conscious to support the LSM (Linux Security 
Modules) and the Flask Security Architecture.
</p>

</body>
</section>
<section>
<title>usermode-sources</title>
<body>

<p>
<c>usermode-sources</c> are the User Mode Linux kernel patches.  This 
kernel is designed to allow Linux to run within Linux to run within Linux
to ... User Mode Linux is intended for testing and virtual server support.
For more information about this amazing tribute to the stability and 
scalability of Linux, see <uri>http://user-mode-linux.sourceforge.net</uri>. 
</p>

<p>
For more information on UML and Gentoo, read the 
<uri link="/doc/en/uml.xml">Gentoo UML Guide</uri>.
</p>

</body>
</section>
<section>
<title>win4lin-sources</title>
<body>

<p>
<c>win4lin-sources</c> are patched to support the userland win4lin tools 
that allow Linux users to run many Microsoft Windows (TM) applications
at almost native speeds.  See <uri>http://www.netraverse.com/</uri> for more 
information.
</p>

</body>
</section>
<section>
<title>wolk-sources</title>
<body>

<p>
<c>wolk-sources</c> contains the <e>Working Overloaded Linux Kernel</e> from 
<uri>http://sourceforge.net/projects/wolk</uri>. This kernel contains
many patches of a wide variety, all combined into the kernel with
extreme care. This allows you to configure nearly every one into and out
of the kernel at compile time -- so the kernel will work with nearly any
combination of the patches.
</p>

<p>
If you need a certain combination of patches that you cannot find in other
kernel sources, WOLK is definitely worth a shot.
</p>

</body>
</section>
</chapter>
</guide>
1	<?xml version="1.0" encoding="UTF-8"?>
2	<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/gentoo-kernel.xml,v 1.12 2004/08/01 15:01:17 cam Exp $ -->
3
4	<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
5	<guide link="/doc/en/gentoo-kernel.xml">
6	<title>Gentoo Linux Kernel Guide</title>
7	<author title="Author">
8	<mail link="swift@gentoo.org">Sven Vermeulen</mail>
9	</author>
10	<author title="Contributor">
11	<mail link="lostlogic@gentoo.org">Brandon Low</mail>
12	</author>
13	<author title="Editor">
14	<mail link="carl@gentoo.org">Carl Anderson</mail>
15	</author>
16	<author title="Editor">
17	<mail link="peesh@gentoo.org">Jorge Paulo</mail>
18	</author>
19	<author title="Editor">
20	<mail link="bennyc@gentoo.org">Benny Chuang</mail>
21	</author>
22	<author title="Editor">
23	<mail link="g.guidi@sns.it">Gregorio Guidi</mail>
24	</author>
25
26	<abstract>
27	This document gives you an overview on all kernel sources that Gentoo
28	provides through Portage.
29	</abstract>
30
31	<license/>
32
33	<version>0.7.1</version>
34	<date>August 2, 2004</date>
35
36	<chapter>
37	<title>Introduction</title>
38	<section>
39	<body>
40
41	<p>
42	As with everything else in Gentoo Linux, the philosophy of the Gentoo
43	Kernel team is to give you, the user, as much freedom of choice as
44	possible. If you take a look at the output of <c>emerge -s sources</c>
45	you see a large variety of kernels to choose from. In this document,
46	I will attempt to give you a brief rundown of the goals of each of the
47	patch sets, which we at Gentoo design, and also explain the other kernel
48	sources we make available to you.
49	</p>
50
51	</body>
52	</section>
53	</chapter>
54
55	<chapter>
56	<title>The Choices, Part I</title>
57	<section>
58	<title>genkernel</title>
59	<body>
60
61	<p>
62	<c>Genkernel</c> is a kernel toolset that can be used to autodetect your
63	hardware and configure your kernel automatically. This is usually recommended
64	for users who do not feel comfortable about compiling a kernel manually.
65	</p>
66
67	<p>
68	For more information, please read the <uri link="/doc/en/genkernel.xml">Gentoo
69	Linux Genkernel Guide</uri>.
70	</p>
71
72	</body>
73	</section>
74	<section>
75	<title>gentoo-sources</title>
76	<body>
77
78	<p>
79	For most users, the recommended kernel sources are the
80	<c>gentoo-sources</c>. The <c>gentoo-sources</c> package contains various
81	kernel patches, designed to improve user experience with respect to different
82	areas. Speaking of <e>security</e>: you can find support for
83	<uri link="http://www.grsecurity.net">grsecurity</uri>, together with other
84	security enhancements and, naturally, all the recent fixes for known
85	vulnerabilities. The included patches deal also with <e>performance</e>
86	(including tweaks for desktop usage and support for recent hardware) and
87	<e>features</e> (supermount, bootsplash, the latest NTFS drivers, and more).
88	</p>
89
90	<p>
91	The <c>gentoo-sources</c> (together with <c>gentoo-dev-sources</c>) absorb
92	most of the resources of the Gentoo kernel team. They are brought to you by a
93	group of talented developers, which can count on the expertise of popular
94	kernel hacker Greg Kroah-Hartman, maintainer of udev and responsible for the
95	USB and PCI subsystems of the official linux kernel.
96	</p>
97
98	</body>
99	</section>
100	<section>
101	<title>vanilla-sources</title>
102	<body>
103
104	<p>
105	The next kernel sources that many of you will probably be familiar with
106	as Linux users are the <c>vanilla-sources</c>. These are the official 2.4
107	kernel sources released on <uri>http://www.kernel.org/</uri>, maintained
108	(contrary to popular belief) not by Linus Torvalds himself, but by Marcelo
109	Tosatti. Linus is the leader of active kernel development, but as he is
110	only one man, he passes off the maintenance of the stable 2.4 kernel branch
111	to someone he can trust to handle it once it has stabilized. Thus, Alan
112	Cox became the maintainer of the Linux-2.2 kernel series and Marcelo
113	Tosatti became the maintainer of the Linux-2.4 kernel series. This is
114	what all the other patch sets in the 2.4 series are based on. Marcelo has
115	been doing an outstanding job with its maintenance and it can be
116	counted on for stability and up-to-date (if not bleeding edge) hardware
117	support.
118	</p>
119
120	<p>
121	<c>vanilla-sources</c> are probably the most stable sources available
122	since they are the most tested and all possible kernel sources are based
123	on them. If you don't need any of the extras that the other kernels supply
124	then the <c>vanilla-sources</c> are your thing.
125	</p>
126
127	</body>
128	</section>
129	<section>
130	<title>gentoo-dev-sources</title>
131	<body>
132
133	<p>
134	The <c>gentoo-dev-sources</c> ebuild includes the most up-to-date 2.6 kernel
135	with Gentoo's optimized performance patches.
136	</p>
137
138	</body>
139	</section>
140	<section>
141	<title>development-sources</title>
142	<body>
143
144	<p>
145	The <c>development-sources</c> ebuild provides the stable 2.6 Linux kernel. As
146	opposed to what the name might suggest, this kernel source is completely stable
147	and production-ready. This is the official 2.6 kernel released on
148	<uri>http://www.kernel.org/</uri>.
149	</p>
150
151	</body>
152	</section>
153	<section>
154	<title>gs-sources</title>
155	<body>
156
157	<p>
158	For users to whom desktop interactive performance comes as a secondary
159	priority to reliability and hardware support, we have the
160	<c>gs-sources</c>. GS stands for Gentoo Stable (creative, aren't we?).
161	This patch set is tuned and tested to provide the best support for the
162	latest hardware and ensures that your mission critical servers will be
163	up when you need them. This kernel doesn't have some of the most
164	aggressive performance tuning patches from the <c>gentoo-sources</c>,
165	but rest assured, the great performance that you know and love from the
166	vanilla kernels are alive and well. Where possible and without
167	compromising stability we add server related performance patches.
168	</p>
169
170	<p>
171	This kernel provides support for the latest ACPI subsystem, EVMS, ECC
172	(required for HA Linux systems), Encrypted Loopback devices, NTFS, Win4Lin
173	and XFS. It also contains updates for IDE, ext3 and several network cards
174	amongst other patches.
175	</p>
176
177	<p>
178	In other words, these sources are perfect for servers and
179	High-Availability systems.
180	</p>
181
182	<p>
183	The following USE-flags can be set to select optional patches:
184	</p>
185
186	<table>
187	<tr><th>Flags</th><th>Description</th></tr>
188	<tr><ti>crypt</ti><ti>Apply cryptographic patches</ti></tr>
189	</table>
190
191	</body>
192	</section>
193	<section>
194	<title>hardened-sources</title>
195	<body>
196
197	<p>
198	<c>hardened-sources</c> provides patches for the various subprojects of
199	Gentoo Hardened (such as support for LSM/SELinux and GRSecurity), together
200	with stability/security-enhancements. Check
201	<uri>http://www.gentoo.org/proj/en/hardened/</uri> for more information.
202	</p>
203
204	<p>
205	The following USE-flags can be set to select optional patches:
206	</p>
207
208	<table>
209	<tr><th>Flags</th><th>Description</th></tr>
210	<tr><ti>selinux</ti><ti>Substitute grSecurity with SELinux support</ti></tr>
211	</table>
212
213	</body>
214	</section>
215	<section>
216	<title>hardened-dev-sources</title>
217	<body>
218
219	<p>
220	<c>hardened-dev-sources</c> use the 2.6 kernel with the patches provided by the
221	various subprojects of Gentoo Hardened.
222	</p>
223
224	</body>
225	</section>
226	<section>
227	<title>Architecture dependent kernels</title>
228	<body>
229
230	<p>
231	<c>alpha-sources</c>, <c>hppa-sources</c>, <c>hppa-dev-sources</c>,
232	<c>ia64-sources</c>, <c>mips-sources</c>, <c>ppc-sources</c>,
233	<c>pegasos-sources</c>, <c>pegasos-dev-sources</c>, <c>sparc-sources</c>
234	and <c>xbox-sources</c> are, as their names suggest, patched to run best on
235	specific architectures. They also contain some of the patches for hardware and
236	features support from the other patch sets mentioned above and below. Kernel
237	sources that contains a "-dev-" means that the sources use the 2.6 kernel
238	instead of the 2.4 kernel.
239	</p>
240
241	<p>
242	The <c>compaq-sources</c> provide RedHat's kernel sources for Alpha,
243	maintained by Compaq.
244	</p>
245
246	</body>
247	</section>
248	</chapter>
249
250	<chapter>
251	<title>The Choices, Part II</title>
252	<section>
253	<body>
254
255	<p>
256	Now I'm going to try to briefly describe some of the other
257	<path>sys-kernel/*-sources</path> which you saw scroll by when you ran
258	<c>emerge -s sources</c>. Lets take them in alphabetical order.
259	</p>
260
261	</body>
262	</section>
263	<section>
264	<title>aa-sources</title>
265	<body>
266
267	<p>
268	First we have <c>aa-sources</c>. This is Andrea Arcangeli's patch set.
269	Andrea is known as an amazing coder by many other kernel hackers. His
270	kernel patch set has some of the most aggressively tuned VM (Virtual
271	Memory) patches known to mankind.
272	</p>
273
274	<p>
275	It also provides User Mode Linux support (check out our
276	<uri link="/doc/en/uml.xml">UML Guide</uri> for more information) and
277	the latest TUX Webserver (an in-kernel webserver).
278	</p>
279
280	<p>
281	If you have Memory Management troubles with other kernels,
282	<c>aa-sources</c> can be your solution. If you want to optimize Linux's
283	Memory Management for your system, <c>aa-sources</c> is <e>definitely</e>
284	what you need.
285	</p>
286
287	<p>
288	Visit
289	<uri>http://www.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.6</uri>
290	for more information about all the patches in these kernel sources.
291	</p>
292
293	</body>
294	</section>
295	<section>
296	<title>ck-sources</title>
297	<body>
298
299	<p>
300	<c>ck-sources</c> is Con Kolivas's kernel patch set. This kernel is
301	<e>HIGHLY</e> tuned for desktop performance at the expense of
302	throughput and some of the scheduler's ability to prioritize
303	applications. Con Kolivas benchmarks kernels to find the best
304	combination of features for desktop use. See
305	<uri>http://kernel.kolivas.org</uri> for more information on Con and his
306	patches.
307	</p>
308
309	</body>
310	</section>
311	<section>
312	<title>grsec-sources</title>
313	<body>
314
315	<p>
316	The <c>grsec-sources</c> kernel source is patched with the latest GRSecurity
317	updates (GRSecurity version 2.0 and up) which includes, amongst other
318	security-related patches, support for PaX.
319	</p>
320
321	</body>
322	</section>
323	<section>
324	<title>mm-sources</title>
325	<body>
326
327	<p>
328	The <c>mm-sources</c> are based on the <c>development-sources</c> and contain
329	Andrew Morton's patch set. They include the experimental and bleeding-edge
330	features that are going to be included in the official kernel (or that are
331	going to be rejected because they set your box on fire). They are known to be
332	always moving at a fast pace and can change radically from one week to the
333	other; kernel hackers use them as a testing ground for new stuff.
334	</p>
335
336	<p>
337	If you really want to live on the edge and you think
338	<c>development-sources</c> are for wussies, then try out
339	<c>mm-sources</c>.
340	</p>
341
342	</body>
343	</section>
344	<section>
345	<title>openmosix-sources</title>
346	<body>
347
348	<p>
349	The <c>openmosix-sources</c> are patched to support the openMosix system
350	(like MOSIX but Open Source). For more information see
351	<uri>http://www.openmosix.org</uri>.
352	</p>
353
354	</body>
355	</section>
356	<section>
357	<title>pac-sources</title>
358	<body>
359
360	<p>
361	The <c>pac-sources</c> kernel tree is patched with Bernhard Rosenkraenzer's
362	(bero) patches.
363	</p>
364
365	</body>
366	</section>
367	<section>
368	<title>planet-ccrma-sources</title>
369	<body>
370
371	<p>
372	This kernel source contains the Linux Kernel source for the version of the
373	Redhat Linux Kernel modified by the Planet CCRMA (custom audio upgrade) project.
374	</p>
375
376	<p>
377	More information can be found at <uri>http://ccrma-www.stanford.edu/</uri>.
378	</p>
379
380	</body>
381	</section>
382	<section>
383	<title>selinux-sources</title>
384	<body>
385
386	<p>
387	<c>selinux-sources</c> from <uri>http://www.nsa.gov/selinux</uri> are
388	patches for the security conscious to support the LSM (Linux Security
389	Modules) and the Flask Security Architecture.
390	</p>
391
392	</body>
393	</section>
394	<section>
395	<title>usermode-sources</title>
396	<body>
397
398	<p>
399	<c>usermode-sources</c> are the User Mode Linux kernel patches. This
400	kernel is designed to allow Linux to run within Linux to run within Linux
401	to ... User Mode Linux is intended for testing and virtual server support.
402	For more information about this amazing tribute to the stability and
403	scalability of Linux, see <uri>http://user-mode-linux.sourceforge.net</uri>.
404	</p>
405
406	<p>
407	For more information on UML and Gentoo, read the
408	<uri link="/doc/en/uml.xml">Gentoo UML Guide</uri>.
409	</p>
410
411	</body>
412	</section>
413	<section>
414	<title>win4lin-sources</title>
415	<body>
416
417	<p>
418	<c>win4lin-sources</c> are patched to support the userland win4lin tools
419	that allow Linux users to run many Microsoft Windows (TM) applications
420	at almost native speeds. See <uri>http://www.netraverse.com/</uri> for more
421	information.
422	</p>
423
424	</body>
425	</section>
426	<section>
427	<title>wolk-sources</title>
428	<body>
429
430	<p>
431	<c>wolk-sources</c> contains the <e>Working Overloaded Linux Kernel</e> from
432	<uri>http://sourceforge.net/projects/wolk</uri>. This kernel contains
433	many patches of a wide variety, all combined into the kernel with
434	extreme care. This allows you to configure nearly every one into and out
435	of the kernel at compile time -- so the kernel will work with nearly any
436	combination of the patches.
437	</p>
438
439	<p>
440	If you need a certain combination of patches that you cannot find in other
441	kernel sources, WOLK is definitely worth a shot.
442	</p>
443
444	</body>
445	</section>
446	</chapter>
447	</guide>