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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 3
3<!DOCTYPE guide SYSTEM "/dtd/guide.dtd"> 4<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
4<guide link="/doc/en/gentoo-kernel.xml"> 5<guide link="/doc/en/gentoo-kernel.xml">
5<title>Gentoo Linux Kernel Guide</title> 6<title>Gentoo Linux Kernel Guide</title>
6<author title="Author"> 7<author title="Author">
7 <mail link="swift@gentoo.org">Sven Vermeulen</mail> 8 <mail link="swift@gentoo.org">Sven Vermeulen</mail>
8</author> 9</author>
9<author title="Contributor"> 10<author title="Contributor">
10 <mail link="lostlogic@gentoo.org">Brandon Low</mail> 11 <mail link="lostlogic@gentoo.org">Brandon Low</mail>
11</author> 12</author>
12<author title="Editor"> 13<author title="Editor">
14 <mail link="dsd@gentoo.org">Daniel Drake</mail>
15</author>
16<author title="Editor">
13 <mail link="carl@gentoo.org">Carl Anderson</mail> 17 <mail link="carl@gentoo.org">Carl Anderson</mail>
14</author> 18</author>
15<author title="Editor"> 19<author title="Editor">
16 <mail link="peesh@gentoo.org">Jorge Paulo</mail> 20 <mail link="peesh@gentoo.org">Jorge Paulo</mail>
21</author>
22<author title="Editor">
23 <mail link="bennyc@gentoo.org">Benny Chuang</mail>
24</author>
25<author title="Editor">
26 <mail link="greg_g@gentoo.org">Gregorio Guidi</mail>
27</author>
28<author title="Editor">
29 <mail link="fox2mike@gentoo.org">Shyam Mani</mail>
17</author> 30</author>
18 31
19<abstract> 32<abstract>
20This document gives you an overview on all kernelsources that Gentoo 33This document gives you an overview on all kernel sources that Gentoo
21provides through Portage. 34provides through Portage.
22</abstract> 35</abstract>
23 36
37<!-- The content of this document is licensed under the CC-BY-SA license -->
38<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
39<license/>
40
24<version>0.1</version> 41<version>1.13</version>
25<date>16 May 2003</date> 42<date>2006-01-30</date>
26 43
27<chapter> 44<chapter>
28<title>Introduction</title> 45<title>Introduction</title>
29<section> 46<section>
30<body> 47<body>
42</body> 59</body>
43</section> 60</section>
44</chapter> 61</chapter>
45 62
46<chapter> 63<chapter>
47<title>The Choices, Part I</title> 64<title>Supported kernel packages</title>
48<section>
49<title>gentoo-sources</title>
50<body>
51
52<p>
53For most users, the recommended kernel sources are the
54<c>gentoo-sources</c>. The <c>gentoo-sources</c> package contains
55specially tuned performance kernel patches designed to optimize tasks
56such as compiling while listening to music and browsing the web. Most
57of you who are new to Gentoo have probably never run a system where you
58are regularly compiling many packages from source while you are doing your
59normal everyday tasks on your computer.
60You may find that if you use the <c>vanilla-sources</c> (the official
61kernel sources released from <uri>http://www.kernel.org</uri>) normal tasks --
62such as listening to music, moving your mouse and the like -- may appear
63jumpy when you are compiling packages.
64</p>
65
66<p>
67The <c>gentoo-sources</c> contain an updated ACPI subsystem and are based
68on Con Kolivas' high-performance kernel patches (<c>ck-sources</c>). We also
69support grSecurity (a set of security-related patches with support for
70ACLs), EVMS(2) (a highly flexible storage management filesystem with easy
71partition resizing), JFS (IBM's high-performance filesystem), the latest
72NTFS drivers, and more.
73</p>
74
75<p>
76Because the <c>gentoo-sources</c> are targeted at full performance, they are
77also very good for gaming purposes.
78</p>
79
80<p>
81The following USE-flags can be set to select optional patches:
82</p>
83
84<table>
85<tr><th>Flag</th><th>Description</th></tr>
86<tr><ti>aavm</ti><ti>Use Andrea Arcangeli's memory management</ti></tr>
87<tr><ti>evms2</ti><ti>Use EVMS 2.0.1 instead of EVMS 1.2.1</ti></tr>
88<tr><ti>crypt</ti><ti>Apply Cryptographic patches</ti></tr>
89<tr><ti>usagi</ti><ti>Keep USAGI, drop superfreeswan, patch-int, loop-jari</ti></tr>
90</table>
91
92
93</body>
94</section> 65<section>
66<title>genkernel</title>
67<body>
68
69<p>
70<c>Genkernel</c> is a kernel toolset that can be used to autodetect your
71hardware and configure your kernel automatically. This is usually recommended
72for users who do not feel comfortable about compiling a kernel manually.
73</p>
74
75<p>
76For more information, please read the <uri link="/doc/en/genkernel.xml">Gentoo
77Linux Genkernel Guide</uri>.
78</p>
79
80</body>
95<section> 81</section>
82<section>
83<title>General purpose: gentoo-sources</title>
84<body>
85
86<p>
87For most users, we recommend the <c>gentoo-sources</c> kernel. Since the
882005.0 release, Gentoo Linux uses 2.6 as the default kernel. Unless you are
89specifically using the 2.4 profile, <c>gentoo-sources</c> will be a 2.6 kernel
90on <e>most</e> architectures.
91</p>
92
93<p>
94<c>gentoo-sources</c> is a kernel based on Linux 2.6, with various kernel
95patches included to fix security problems, kernel bugs, and to increase
96compatibility with the more uncommon system architectures. Linux 2.6 is
97the current official stable kernel tree, and development is progressing
98rapidly. For highest performance, best hardware support, and its large
99new feature set, we recommend 2.6 over its older 2.4 counterpart.
100</p>
101
102<p>
103Some of the more uncommon system architectures are not fully compatible with
104Linux 2.6, and some users prefer to the tried-and-tested Linux 2.4 kernel;
105for this reason we provide <c>gentoo-sources</c> (the 2.4 version). The
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
108improve performance. Linux 2.4 is currently not being developed further - only
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>
113
114<p>
115The <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
117can count on the expertise of popular kernel hacker Greg Kroah-Hartman,
118maintainer of udev and responsible for the USB and PCI subsystems of the
119official Linux kernel.
120</p>
121
122</body>
123</section>
124<section>
96<title>vanilla-sources</title> 125<title>Plain kernels: vanilla-sources</title>
97<body> 126<body>
98 127
99<p> 128<p>
100The next kernel sources that many of you will probably be familiar with 129The next kernel sources that many of you will probably be familiar with
101as Linux users are the <c>vanilla-sources</c>. As I mentioned briefly 130as Linux users are the <c>vanilla-sources</c>. These are the official kernel
102above, these are the official kernel sources released on 131sources released on <uri>http://www.kernel.org/</uri>. Please note that we do
103<uri>http://www.kernel.org/</uri>. These sources are maintained (contrary 132not patch these kernels at all - these are purely for people who wish to run
104to popular belief) not by Linus Torvalds himself, but by Marcelo 133a completely unmodified Linux kernel.
105Tosatti. Linus is the leader of active kernel development, but as he is
106only one man, he passes off the maintenance of the stable kernel branch
107to someone he can trust to handle it once it has stabilized. Thus, Alan
108Cox became the maintainer of the Linux-2.2 kernel series and Marcelo
109Tosatti became the maintainer of the Linux-2.4 kernel series. This is
110what all the other patch sets in the 2.4 series are based on. Marcelo has
111been doing an outstanding job with its maintenance and it can be
112counted on for stability and up-to-date (if not bleeding edge) hardware
113support.
114</p>
115
116<p> 134</p>
117<c>vanilla-sources</c> are probably the most stable sources available 135
118since they are the most tested and all possible kernel sources are based
119on them. If you don't need any of the extras that the other kernels supply
120then the <c>vanilla-sources</c> are your thing.
121</p> 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>
122 140
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
123</body> 157</body>
124</section>
125<section> 158</section>
126<title>gs-sources</title>
127<body>
128 159
129<p>
130For users to whom desktop interactive performance comes as a secondary
131priority to reliability and hardware support, we have the
132<c>gs-sources</c>. GS stands for Gentoo Stable (creative, aren't we?).
133This patch set is tuned and tested to provide the best support for the
134latest hardware and ensures that your mission critical servers will be
135up when you need them. This kernel doesn't have some of the most
136aggressive performance tuning patches from the <c>gentoo-sources</c>,
137but rest assured, the great performance that you know and love from the
138vanilla kernels are alive and well. Where possible and without
139compromising stability we add server related performance patches.
140</p>
141
142<p>
143This kernel provides support for the latest ACPI subsystem, EVMS, ECC
144(required for HA Linux systems), Encrypted Loopback devices, NTFS, Win4Lin
145and XFS. It also contains updates for IDE, ext3 and several network cards
146amongst other patches.
147</p>
148
149<p>
150In other words, these sources are perfect for servers and
151High-Availability systems.
152</p>
153
154<p>
155The following USE-flags can be set to select optional patches:
156</p>
157
158<table>
159<tr><th>Flags</th><th>Description</th></tr>
160<tr><ti>crypt</ti><ti>Apply cryptographic patches</ti></tr>
161</table>
162
163</body>
164</section> 160<section>
165<section> 161<title>For servers: hardened-sources and rsbac-sources</title>
166<title>pfeifer-sources</title>
167<body>
168
169<p>
170<c>pfeifer-sources</c> are what will become <c>gentoo-sources</c> after
171lots of testing and QA. Patches to the <c>gentoo-sources</c> are first
172added to <c>pfeifer-sources</c> for testing. So if you want the
173performance of <c>gentoo-sources</c> with the most recent possible
174patches, use <c>pfeifer-sources</c>.
175</p>
176
177<p>
178The following USE-flags can be set to select optional patches:
179</p>
180
181<table>
182<tr><th>Flag</th><th>Description</th></tr>
183<tr><ti>aavm</ti><ti>Use Andrea Arcangeli's memory management</ti></tr>
184<tr><ti>evms2</ti><ti>Use EVMS 2.0.1 instead of EVMS 1.2.1</ti></tr>
185<tr><ti>crypt</ti><ti>Apply Cryptographic patches</ti></tr>
186<tr><ti>usagi</ti><ti>Keep USAGI, drop superfreeswan, patch-int, loop-jari</ti></tr>
187</table>
188
189</body> 162<body>
190</section>
191<section>
192<title>hardened-sources</title>
193<body>
194 163
195<p>
196<c>hardened-sources</c> provides patches for the various subprojects of
197Gentoo Hardened, together with stability/security-enhancements. Check
198<uri>http://www.gentoo.org/proj/en/hardened/</uri> for more information.
199</p> 164<p>
200 165<c>hardened-sources</c> is based on the official Linux kernel and is targeted
166at our users running Gentoo on server systems. It provides patches for the
167various subprojects of Gentoo Hardened (such as support for
168<uri link="http://www.nsa.gov/selinux/">LSM/SELinux</uri> and
169<uri link="http://grsecurity.net">grsecurity</uri>), together with
170stability/security-enhancements. Like <c>gentoo-sources</c> it comes in 2.6
171and 2.4 versions. Check <uri>http://www.gentoo.org/proj/en/hardened/</uri> for
172more information.
201<p> 173</p>
202The following USE-flags can be set to select optional patches: 174
203</p> 175<p>
204 176<c>rsbac-sources</c> contains patches to use Rule Set Based Access Controls
205<table> 177(<uri link="http://www.rsbac.org">RSBAC</uri>) and comes in 2.4 and 2.6
206<tr><th>Flags</th><th>Description</th></tr> 178flavours. It is maintained by the <uri link="/proj/en/hardened/rsbac/">RSBAC
207<tr><ti>selinux</ti><ti>Substitute grSecurity with SELinux support</ti></tr> 179project</uri>, a sub-project of Gentoo Hardened.
208</table>
209
210</body>
211</section>
212<section>
213<title>xfs-sources</title>
214<body>
215
216<p> 180</p>
217<c>xfs-sources</c> contains support for EVMS, ACPI, grSecurity and, what
218you probably already figured out by now, the latest XFS support patches
219from the XFS Development. The Gentoo LiveCD uses <c>xfs-sources</c>, if
220you must know :-)
221</p>
222 181
223<p> 182<impo>
224More information about XFS on <uri>http://oss.sgi.com/projects/xfs/</uri>. 183These kernels provide powerful patches for enhanced security. Please read the
225</p> 184<uri link="/proj/en/hardened/">documentation</uri> before you use them.
226 185</impo>
227<p>
228You can select the following USE-flags to select optional patches:
229</p>
230
231<table>
232<tr><th>Flags</th><th>Description</th></tr>
233<tr><ti>crypt</ti><ti>Apply cryptographic patches</ti></tr>
234</table>
235 186
236</body> 187</body>
237</section> 188</section>
238<section> 189<section>
239<title>Architecture dependent kernels</title> 190<title>Architecture dependent kernels</title>
240<body> 191<body>
241 192
242<p> 193<p>
243<c>alpha-sources</c>, <c>arm-sources</c>, <c>hppa-sources</c>, 194<c>alpha-sources</c>, <c>hppa-sources</c>,<c>mips-sources</c>, <c>sh-sources</c>
244<c>mips-sources</c>, <c>ppc-sources</c> and <c>sparc-sources</c> are, as 195<c>sparc-sources</c> and <c>xbox-sources</c> are, as their names suggest,
245their names suggest, patched to run best on specific architectures. They 196patched to run best on specific architectures. They also contain some of the
246also contain some of the patches for hardware and features support from 197patches for hardware and features support from the other patch sets mentioned
247the other patch sets mentioned above and below. 198above and below.
248</p>
249
250</body>
251</section>
252<section>
253<title>ppc-sources-benh</title>
254<body>
255
256<p>
257The <c>ppc-sources-benh</c> ebuilds provide additional hardware
258support for the <c>ppc-sources</c> kernel. It is slightly more
259experimental than the <c>ppc-sources</c>.
260</p>
261
262</body>
263</section>
264<section>
265<title>ppc-sources-crypto</title>
266<body>
267
268<p>
269The <c>ppc-sources-crypto</c> ebuilds provide CryptoAPI
270support for the Gentoo Linux PPC Kernel. More information about
271CryptoAPI can be found on <uri>http://www.kerneli.org/about/</uri>.
272</p>
273
274</body>
275</section>
276<section>
277<title>ppc-sources-dev</title>
278<body>
279
280<p>
281The <c>ppc-sources-dev</c> packages provide the development sources for
282<c>ppc-sources</c>. Every patch which should become part of
283<c>ppc-sources</c> has to go through <c>ppc-sources-dev</c> first.
284</p>
285
286</body>
287</section>
288<section>
289<title>compaq-sources</title>
290<body>
291
292<p>
293The <c>compaq-sources</c> provide RedHat's kernel sources for Alpha,
294maintained by Compaq.
295</p> 199</p>
296 200
297</body> 201</body>
298</section> 202</section>
299</chapter> 203</chapter>
300 204
301<chapter> 205<chapter>
302<title>The Choices, Part II</title> 206<title>Unsupported kernel packages</title>
303<section> 207<section>
304<body> 208<body>
305 209
306<p> 210<p>
307Now I'm going to try to briefly describe some of the other 211Now I'm going to try to briefly describe some of the other
308<path>sys-kernel/*-sources</path> which you saw scroll by when you ran 212<path>sys-kernel/*-sources</path> which you saw scroll by when you ran
309<c>emerge -s sources</c>. Lets take them in alphabetical order. 213<c>emerge -s sources</c>. Lets take them in alphabetical order. These
310</p> 214kernels are provided as a courtesy only and the various patch sets are not
311 215supported by the Gentoo team.
312</body>
313</section>
314<section>
315<title>aa-sources</title>
316<body>
317
318<p>
319First we have <c>aa-sources</c>. This is Andrea Arcangeli's patch set.
320Andrea is known as an amazing coder by many other kernel hackers. His
321kernel patch set has some of the most aggressively tuned VM (Virtual
322Memory) patches known to mankind. When I last looked, it also contained
323SGI's XFS filesystem and the O(1) scheduler by Ingo Molar (which will
324become the default scheduler for Linux 2.6).
325</p>
326
327<p>
328It also provides User Mode Linux support (check out our
329<uri link="/doc/en/uml.xml">UML Guide</uri> for more information) and
330the latest TUX Webserver (an in-kernel webserver).
331</p>
332
333<p>
334If you have Memory Management troubles with other kernels,
335<c>aa-sources</c> can be your solution. If you want to optimize Linux's
336Memory Management for your system, <c>aa-sources</c> is <e>definitely</e>
337what you need.
338</p>
339
340<p>
341Visit
342<uri>http://www.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4</uri>
343for more information about all the patches in these kernel sources.
344</p>
345
346</body>
347</section>
348<section>
349<title>ac-sources</title>
350<body>
351
352<p>
353Next we have the <c>ac-sources</c>. This is Alan Cox's patch set against
354the 2.4 kernel series. In this patch set you will find the O(1)
355scheduler, the latest updates to the 2.4 IDE system and many other
356patches that are waiting for possible inclusion in the 2.4 kernel
357series.
358</p>
359
360<p>
361This kernel is known to have very decent support for several additional
362hardware and may be a candidate for you if you need a stable but less
363conservative kernel than the <c>vanilla-sources</c>.
364</p>
365
366<p>
367Check out
368<uri>http://www.kernel.org/pub/linux/kernel/people/alan/linux-2.4/</uri>
369to get a look at what Alan is working on.
370</p> 216</p>
371 217
372</body> 218</body>
373</section> 219</section>
374<section> 220<section>
375<title>ck-sources</title> 221<title>ck-sources</title>
376<body> 222<body>
377 223
378<p> 224<p>
379<c>ck-sources</c> is Con Kolivas's kernel patch set. This kernel is 225<c>ck-sources</c> is Con Kolivas's kernel patch set. This patchset is
380<e>HIGHLY</e> tuned for desktop performance at the expense of 226primarily designed to improve system responsiveness and interactivity and is
381throughput and some of the scheduler's ability to prioritize 227configurable for varying workloads (from servers to desktops). The patchset is
382applications. Con Kolivas benchmarks kernels to find the best 228also quite mature and has been put through numerous iterations of development
383combination of features for desktop use. See 229and tuning. The emphasis of each release is on stability and security. Support
384<uri>http://kernel.kolivas.org</uri> for more information on Con and his 230and information is available at <uri>http://kernel.kolivas.org</uri> and in
385patches. 231<c>#ck</c> on <c>irc.oftc.net</c>.
386</p> 232</p>
387 233
388</body> 234</body>
389</section>
390<section> 235</section>
391<title>development-sources</title>
392<body>
393
394<p>
395<c>development-sources</c> is the current unstable kernel branch. This
396is the branch of the Linux kernel that Linus himself maintains. This
397rapidly changing playground is where the features for the next stable
398branch are implemented, enhanced and tested before they are released
399to the vast majority of Linux users.
400</p>
401
402<p>
403If you want the latest, bleeding edge support and experimental core-system
404changes, this is what you want. Note however that these are <e>highly</e>
405experimental kernel sources and it is advised <e>not</e> to use them on mission
406critical or production systems.
407</p>
408
409<warn>
410Do note that Gentoo Linux does not support issues with or related
411to the <c>development-sources</c> or derivatives as it changes too often
412and is known to break things occasionally.
413</warn>
414
415</body>
416</section> 236<section>
417<section>
418<title>gaming-sources</title> 237<title>git-sources</title>
419<body> 238<body>
420 239
421<p>
422<c>gaming-sources</c> are based on <c>ck-sources</c> and are therefore
423tuned for high performance. They also contain patches for the latest
424game-related hardware (graphic cards, sound cards, and such).
425</p> 240<p>
426 241The <c>git-sources</c> package tracks daily snapshots of the upstream
427<p> 242development kernel tree. You should run these kernels if you are interested in
428If you are a hardcore gamer, this is your choice. 243kernel development or testing. Bugreports should go to the <uri
244link="http://bugme.osdl.org/">Linux Kernel Bug Tracker</uri> or LKML (Linux
245Kernel Mailing List).
429</p> 246</p>
430 247
431</body> 248</body>
432</section> 249</section>
433<section> 250<section>
434<title>mm-sources</title> 251<title>mm-sources</title>
435<body> 252<body>
436 253
437<p> 254<p>
438The <c>mm-sources</c> are based on the <c>development-sources</c> and 255The <c>mm-sources</c> are based on the <c>vanilla-sources</c> and contain
439contain Andrew Morton's patch set. It assembles several other patches, 256Andrew Morton's patch set. They include the experimental and bleeding-edge
440like ext2/3 Extended Attributes and Access Control Lists, Page Table 257features that are going to be included in the official kernel (or that are
441Sharing, the Orlov Allocator, non-linear mapping behaviour, etc into one 258going to be rejected because they set your box on fire). They are known to be
442patch set. 259always moving at a fast pace and can change radically from one week to the
443</p> 260other; kernel hackers use them as a testing ground for new stuff.
444
445<p> 261</p>
262
263<p>
446If you really want to live on the edge and you think 264If you really want to live on the edge and you think
447<c>development-sources</c> are for wussies, then try out 265<c>vanilla-sources</c> are for wussies, then try out
448<c>mm-sources</c>. 266<c>mm-sources</c>. Be warned that this kernel is highly experimental and
449</p> 267doesn't always work as expected.
450
451</body>
452</section>
453<section>
454<title>mosix-sources</title>
455<body>
456
457<p>
458The <c>mosix-sources</c> are patched to support MOSIX operation for
459clustered computing. A cluster is a set of nodes (PCs) with software
460that enables them to handle tasks in a distributed manner. With
461clusters, you don't need high-profile supercomputers to do lengthy
462tasks. For more information see <uri>http://www.mosix.org</uri>.
463</p> 268</p>
464 269
465</body> 270</body>
466</section> 271</section>
467<section> 272<section>
468<title>openmosix-sources</title> 273<title>openmosix-sources</title>
469<body> 274<body>
470 275
471<p> 276<p>
472The <c>openmosix-sources</c> are patched to support the openMosix system 277The <c>openmosix-sources</c> are patched to support the openMosix system
473(like MOSIX but Open Source). For more information see 278(a cluster oriented kernel patchset like MOSIX but Open Source). For more
474<uri>http://www.openmosix.org</uri>. 279information see <uri>http://www.openmosix.org</uri>.
475</p> 280</p>
476 281
477</body> 282</body>
478</section>
479
480<!--
481 TODO: Add descriptions of the other ppc-sources here
482-->
483
484<section> 283</section>
485<title>redhat-sources</title>
486<body>
487
488<p>
489The <c>redhat-sources</c> are, as the name suggests, the sources for the
490RedHat Linux kernel. Thanks to the wonders of Open Source, anyone can
491take advantage of the work the RedHat engineers put into making their
492kernels. We at Gentoo have provided an ebuild so that you can easily
493use this kernel with Gentoo.
494</p>
495
496</body>
497</section> 284<section>
285<title>openvz-sources</title>
286<body>
287
288<p>
289OpenVZ is a server virtualization solution built on Linux. OpenVZ creates
290isolated, secure virtual private servers (VPSs) or virtual environments on a
291single physical server enabling better server utilization and ensuring that
292applications do not conflict. For more information, see
293<uri>http://www.openvz.org</uri>.
294</p>
295
296</body>
498<section> 297</section>
499<title>rsbac-sources</title>
500<body>
501
502<p>
503<c>rsbac-sources</c> contain the patches from
504<uri>http://www.rsbac.org</uri>. RSBAC stands for <e>Rule Set Based
505Access Control</e>. These kernel patches allow you to authorize users
506based on rules instead of normal uid/gid permissions.
507</p>
508
509</body>
510</section> 298<section>
299<title>suspend2-sources</title>
300<body>
301
302<p>
303The <c>suspend2-sources</c> are patched with both genpatches
304which includes the patches found in gentoo-sources, and <uri
305link="http://www.suspend2.net">Software Suspend 2</uri> which is a new
306and improved implementation of suspend-to-disk for the Linux kernel.
307</p>
308
309<p>
310This kernel is recommended for laptop users who often rely on being able
311to suspend their laptop and resume work elsewhere.
312</p>
313
314</body>
511<section> 315</section>
316<section>
512<title>selinux-sources</title> 317<title>uclinux-sources</title>
513<body> 318<body>
514 319
515<p> 320<p>
516<c>selinux-sources</c> from <uri>http://www.nsa.gov/selinux</uri> are 321The <c>uclinux-sources</c> are meant for CPUs without MMUs as well as embedded
517patches for the security conscious to support the LSM (Linux Security 322devices. For more information, see <uri>http://www.uclinux.org</uri>.
518Modules) and the Flask Security Architecture.
519</p> 323</p>
520 324
521</body> 325</body>
522</section> 326</section>
523<section> 327<section>
537<uri link="/doc/en/uml.xml">Gentoo UML Guide</uri>. 341<uri link="/doc/en/uml.xml">Gentoo UML Guide</uri>.
538</p> 342</p>
539 343
540</body> 344</body>
541</section> 345</section>
346</chapter>
347
348<chapter>
349<title>Previously provided kernel packages</title>
350<section>
351<title>aa-sources</title>
352<body>
353
354<p>
355<c>aa-sources</c> was a heavily modified kernel with all kinds of patches.
356The upstream maintainer has stopped releasing kernel patchsets, this package
357was removed as it went out of date.
358</p>
359
360</body>
361</section>
362<section>
363<title>alpha-sources</title>
364<body>
365
366<p>
367<c>alpha-sources</c> was a 2.4 kernel with patches applied to improve hardware
368compatibility for the Alpha architecture. These patches have been developed
369and included in the mainline kernel. Alpha users can now run any recent kernel
370with no need for extra patches.
371</p>
372
373</body>
374</section>
375<section>
376<title>development-sources</title>
377<body>
378
379<p>
380<c>development-sources</c>, the official 2.6 kernel from kernel.org, can now
381be found under the <c>vanilla-sources</c> package.
382</p>
383
384</body>
385</section>
386<section>
387<title>gentoo-dev-sources</title>
388<body>
389
390<p>
391<c>gentoo-dev-sources</c>, a 2.6 kernel patched with bug, security and
392stability fixes, can now be found under the <c>gentoo-sources</c> package.
393</p>
394
395</body>
396</section>
397<section>
398<title>grsec-sources</title>
399<body>
400
401<p>
402The <c>grsec-sources</c> kernel source used to be patched with the latest
403grsecurity updates (grsecurity version 2.0 and up) which included, amongst
404other security-related patches, support for PaX. As grsecurity patches are
405included in <c>hardened-sources</c>, this package is no longer in Portage.
406</p>
407
408</body>
409</section>
410<section>
411<title>hardened-dev-sources</title>
412<body>
413
414<p>
415<c>hardened-dev-sources</c> can now be found under the <c>hardened-sources</c>
416package.
417</p>
418
419</body>
420</section>
421<section>
422<title>rsbac-dev-sources</title>
423<body>
424
425<p>
426The <c>rsbac-dev-sources</c> kernels can now be found under the
427<c>rsbac-sources</c> package.
428</p>
429
430</body>
431</section>
432<section>
433<title>selinux-sources</title>
434<body>
435
436<p>
437<c>selinux-sources</c>, a 2.4 kernel including lots of security enhancements,
438has been obsoleted by security development in the 2.6 tree. SELinux
439functionality can be found in the <c>hardened-sources</c> package.
440</p>
441
442</body>
443</section>
542<section> 444<section>
543<title>win4lin-sources</title> 445<title>win4lin-sources</title>
544<body> 446<body>
545 447
546<p> 448<p>
547<c>win4lin-sources</c> are patched to support the userland win4lin tools 449<c>win4lin-sources</c> were patched to support the userland win4lin tools
548that allow Linux users to run many Microsoft Windows (TM) applications 450that allow Linux users to run many Microsoft Windows (TM) applications
549at almost native speeds. See <uri>http://www.netraverse.com/</uri> for more 451at almost native speeds. This was removed due to security issues.
550information.
551</p>
552
553</body>
554</section>
555<section>
556<title>wolk-sources</title>
557<body>
558
559<p>
560<c>wolk-sources</c> contains the <e>Working Overloaded Linux Kernel</e> from
561<uri>http://sourceforge.net/projects/wolk</uri>. This kernel contains
562many patches of a wide variety, all combined into the kernel with
563extreme care. This allows you to configure nearly every one into and out
564of the kernel at compile time -- so the kernel will work with nearly any
565combination of the patches.
566</p>
567
568<p>
569If you need a certain combination of patches that you cannot find in other
570kernel sources, WOLK is definitely worth a shot.
571</p> 452</p>
572 453
573</body> 454</body>
574</section> 455</section>
575</chapter> 456</chapter>

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