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Mon Sep 6 05:55:00 2010 UTC (4 years ago) by nightmorph
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add xen-sources to the list of kernels, shuffle around the list of kernels supported by the Kernel team

1 swift 1.1 <?xml version="1.0" encoding="UTF-8"?>
2 nightmorph 1.58 <!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
3 nightmorph 1.62 <!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/gentoo-kernel.xml,v 1.61 2010/09/06 05:03:31 nightmorph Exp $ -->
4 swift 1.1
5 nightmorph 1.58 <guide>
6 swift 1.1 <title>Gentoo Linux Kernel Guide</title>
7 nightmorph 1.58
8 swift 1.1 <author title="Author">
9 nightmorph 1.44 <mail link="swift@gentoo.org">Sven Vermeulen</mail>
10 swift 1.1 </author>
11     <author title="Contributor">
12 swift 1.17 <mail link="lostlogic@gentoo.org">Brandon Low</mail>
13 swift 1.1 </author>
14     <author title="Editor">
15 swift 1.17 <mail link="dsd@gentoo.org">Daniel Drake</mail>
16 swift 1.1 </author>
17     <author title="Editor">
18 swift 1.17 <mail link="carl@gentoo.org">Carl Anderson</mail>
19     </author>
20     <author title="Editor">
21     <mail link="peesh@gentoo.org">Jorge Paulo</mail>
22 swift 1.1 </author>
23 bennyc 1.9 <author title="Editor">
24     <mail link="bennyc@gentoo.org">Benny Chuang</mail>
25     </author>
26 neysx 1.10 <author title="Editor">
27 neysx 1.22 <mail link="greg_g@gentoo.org">Gregorio Guidi</mail>
28 neysx 1.10 </author>
29 fox2mike 1.35 <author title="Editor">
30     <mail link="fox2mike@gentoo.org">Shyam Mani</mail>
31     </author>
32 nightmorph 1.48 <author title="Editor">
33 nightmorph 1.47 <mail link="nightmorph@gentoo.org">Joshua Saddler</mail>
34     </author>
35 swift 1.1
36     <abstract>
37 bennyc 1.9 This document gives you an overview on all kernel sources that Gentoo
38 swift 1.1 provides through Portage.
39     </abstract>
40    
41 fox2mike 1.35 <!-- The content of this document is licensed under the CC-BY-SA license -->
42     <!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
43 swift 1.6 <license/>
44    
45 nightmorph 1.62 <version>3</version>
46 nightmorph 1.61 <date>2010-09-05</date>
47 swift 1.1
48     <chapter>
49     <title>Introduction</title>
50     <section>
51     <body>
52    
53     <p>
54 swift 1.53 As with everything else in Gentoo Linux, the philosophy of the Gentoo
55     Kernel team is to give you, the user, as much freedom of choice as
56     possible. If you take a look at the output of <c>emerge -s sources</c>
57     you see a large variety of kernels to choose from. In this document,
58     I will attempt to give you a brief rundown of the goals of each of the
59 swift 1.1 patch sets, which we at Gentoo design, and also explain the other kernel
60     sources we make available to you.
61     </p>
62    
63 nightmorph 1.45 <p>
64 nightmorph 1.47 Linux 2.4 is maintained by Willy Tarreau. Linus Torvalds, the original creator
65     of Linux, handed maintainership of the Linux 2.4 branch over to Marcelo Tosatti
66     when Linus went off to start developing the newer 2.6 kernel tree. Marcelo did a
67     fine job of keeping 2.4 stable and secure, and has since handed over
68     maintainership to Willy. Note that only security and bug fixes are accepted into
69     the 2.4 kernel tree. Actual development happens in the Linux 2.6 kernel tree.
70 nightmorph 1.46 </p>
71    
72     <p>
73     Linux 2.6 is maintained by Andrew Morton, who works closely with Linus
74     Torvalds to deliver a fast, powerful, and feature-packed Linux kernel.
75     Development is happening at incredible pace and this kernel tree is now very
76     mature.
77     </p>
78    
79     <p>
80 nightmorph 1.45 Some of the more uncommon system architectures are not fully compatible with
81     Linux 2.6, and some users prefer the tried-and-tested Linux 2.4 kernel. However,
82     please note that Linux 2.4 is currently not being developed further - only bug
83     and security fixes are being included in the newer releases. If you are able to,
84     we suggest that you upgrade to Linux 2.6. You may find the <uri
85     link="/doc/en/migration-to-2.6.xml">migration document</uri> useful.
86     </p>
87    
88 swift 1.1 </body>
89     </section>
90     </chapter>
91    
92     <chapter>
93 swift 1.17 <title>Supported kernel packages</title>
94 swift 1.1 <section>
95 bennyc 1.9 <title>genkernel</title>
96     <body>
97    
98     <p>
99     <c>Genkernel</c> is a kernel toolset that can be used to autodetect your
100     hardware and configure your kernel automatically. This is usually recommended
101     for users who do not feel comfortable about compiling a kernel manually.
102     </p>
103    
104 cam 1.11 <p>
105     For more information, please read the <uri link="/doc/en/genkernel.xml">Gentoo
106     Linux Genkernel Guide</uri>.
107     </p>
108    
109 bennyc 1.9 </body>
110     </section>
111     <section>
112 swift 1.26 <title>General purpose: gentoo-sources</title>
113 swift 1.1 <body>
114    
115     <p>
116 nightmorph 1.54 For most users, we recommend the <c>gentoo-sources</c> kernel.
117 nightmorph 1.45 <c>gentoo-sources</c> is a kernel based on Linux 2.6, lightly patched to fix
118     security problems, kernel bugs, and to increase compatibility with the more
119 nightmorph 1.54 uncommon system architectures.
120 swift 1.24 </p>
121    
122     <p>
123     The <c>gentoo-sources</c> package absorbs most of the resources of the Gentoo
124     kernel team. They are brought to you by a group of talented developers, which
125     can count on the expertise of popular kernel hacker Greg Kroah-Hartman,
126     maintainer of udev and responsible for the USB and PCI subsystems of the
127     official Linux kernel.
128 swift 1.1 </p>
129    
130     </body>
131     </section>
132     <section>
133 nightmorph 1.56 <title>For servers: hardened-sources</title>
134 swift 1.1 <body>
135    
136     <p>
137 nightmorph 1.54 <c>hardened-sources</c> is based on the official Linux kernel and is targeted at
138     our users running Gentoo on server systems. It provides patches for the various
139     subprojects of Gentoo Hardened (such as support for <uri
140     link="http://www.nsa.gov/selinux/">LSM/SELinux</uri> and <uri
141     link="http://grsecurity.net">grsecurity</uri>), together with
142     stability/security-enhancements. Check
143     <uri>http://www.gentoo.org/proj/en/hardened/</uri> for more information.
144 swift 1.17 </p>
145    
146 neysx 1.29 <impo>
147 nightmorph 1.56 This kernel provides powerful patches for enhanced security. Please read the
148     <uri link="/proj/en/hardened/">documentation</uri> before you use it.
149 neysx 1.29 </impo>
150 swift 1.1
151     </body>
152     </section>
153     <section>
154 nightmorph 1.62 <title>ck-sources</title>
155 swift 1.1 <body>
156    
157     <p>
158 nightmorph 1.62 <c>ck-sources</c> is Con Kolivas's kernel patch set. This patchset is primarily
159     designed to improve system responsiveness and interactivity and is configurable
160     for varying workloads (from servers to desktops). The patchset includes a
161     different scheduler, BFS, designed to keep systems responsive and smooth even
162     when under heavy load. Support and information is available at
163     <uri>http://kernel.kolivas.org</uri> and in <c>#ck</c> on <c>irc.oftc.net</c>.
164 swift 1.1 </p>
165    
166     </body>
167     </section>
168 nightmorph 1.62 <section>
169     <title>git-sources</title>
170     <body>
171    
172     <p>
173     The <c>git-sources</c> package tracks daily snapshots of the upstream
174     development kernel tree. You should run these kernels if you are interested in
175     kernel development or testing. Bugreports should go to the <uri
176     link="http://bugzilla.kernel.org/">Linux Kernel Bug Tracker</uri> or LKML
177     (Linux Kernel Mailing List).
178     </p>
179 swift 1.1
180 nightmorph 1.62 </body>
181     </section>
182 swift 1.1 <section>
183 nightmorph 1.62 <title>xen-sources</title>
184 swift 1.1 <body>
185    
186     <p>
187 nightmorph 1.62 <c>xen-sources</c> lets you run multiple operating systems on a single physical
188     system. You can create virtual environments in which one or more guest operating
189     systems run on a <uri link="http://www.xensource.com">Xen</uri>-powered host
190     operating system.
191     </p>
192    
193     <p>
194     For more information on Xen and Gentoo, read the <uri
195     link="/doc/en/xen-guide.xml">Gentoo Xen Guide</uri>.
196 swift 1.1 </p>
197    
198     </body>
199     </section>
200     <section>
201 nightmorph 1.62 <title>Architecture dependent kernels</title>
202 nightmorph 1.61 <body>
203    
204     <p>
205 nightmorph 1.62 <c>cell-sources</c>, <c>mips-sources</c>, <c>sparc-sources</c>, and
206     <c>xbox-sources</c> are, as their names suggest, patched to run best on specific
207     architectures. They also contain some of the patches for hardware and features
208     support from the other patch sets mentioned above and below.
209 nightmorph 1.61 </p>
210    
211     </body>
212     </section>
213 nightmorph 1.62 </chapter>
214 nightmorph 1.61
215 nightmorph 1.62 <chapter>
216     <title>Unsupported kernel packages</title>
217 nightmorph 1.61 <section>
218 jkt 1.36 <body>
219    
220     <p>
221 nightmorph 1.62 Now I'm going to try to briefly describe some of the other
222     <path>sys-kernel/*-sources</path> which you saw scroll by when you ran
223     <c>emerge -s sources</c>. Let's take them in alphabetical order. These
224     kernels are provided as a courtesy only and the various patch sets are not
225     supported by the Gentoo kernel team.
226 jkt 1.36 </p>
227    
228     </body>
229     </section>
230 nightmorph 1.62
231 jkt 1.36 <section>
232 swift 1.1 <title>mm-sources</title>
233     <body>
234    
235     <p>
236 neysx 1.29 The <c>mm-sources</c> are based on the <c>vanilla-sources</c> and contain
237 neysx 1.10 Andrew Morton's patch set. They include the experimental and bleeding-edge
238     features that are going to be included in the official kernel (or that are
239     going to be rejected because they set your box on fire). They are known to be
240     always moving at a fast pace and can change radically from one week to the
241     other; kernel hackers use them as a testing ground for new stuff.
242 swift 1.1 </p>
243    
244     <p>
245 swift 1.17 If you really want to live on the edge and you think
246 neysx 1.29 <c>vanilla-sources</c> are for wussies, then try out
247 swift 1.17 <c>mm-sources</c>. Be warned that this kernel is highly experimental and
248     doesn't always work as expected.
249 swift 1.1 </p>
250    
251     </body>
252     </section>
253     <section>
254 nightmorph 1.61 <title>pf-sources</title>
255     <body>
256    
257     <p>
258     The <c>pf-sources</c> kernel brings together parts of several different kernel
259     patches. It includes the BFS patchset from <c>ck-sources</c>, the
260     <c>tuxonice</c> patches, <uri link="http://www.linuximq.net">LinuxIMQ</uri>, and
261     the <uri
262     link="http://algo.ing.unimo.it/people/paolo/disk_sched/patches/">BFQ</uri> I/O
263     <uri
264     link="http://kerneltrap.org/Linux/Budget_Fair_Queuing_IO_Scheduler">scheduler</uri>.
265     </p>
266    
267     </body>
268     </section>
269     <section>
270 fox2mike 1.35 <title>openvz-sources</title>
271     <body>
272    
273     <p>
274 flammie 1.39 OpenVZ is a server virtualization solution built on Linux. OpenVZ creates
275 fox2mike 1.35 isolated, secure virtual private servers (VPSs) or virtual environments on a
276     single physical server enabling better server utilization and ensuring that
277     applications do not conflict. For more information, see
278 flammie 1.39 <uri>http://www.openvz.org</uri>.
279 fox2mike 1.35 </p>
280    
281     </body>
282     </section>
283     <section>
284 swift 1.51 <title>tuxonice-sources</title>
285 swift 1.1 <body>
286    
287     <p>
288 swift 1.52 The <c>tuxonice-sources</c> (formerly <c>suspend2-sources</c>) are patched with
289     both genpatches which includes the patches found in gentoo-sources, and <uri
290 swift 1.53 link="http://www.tuxonice.net">TuxOnIce</uri> which is an improved
291     implementation of suspend-to-disk for the Linux kernel, formerly known as
292 swift 1.52 <e>suspend2</e>.
293 swift 1.1 </p>
294    
295     <p>
296 fox2mike 1.35 This kernel is recommended for laptop users who often rely on being able
297     to suspend their laptop and resume work elsewhere.
298 swift 1.1 </p>
299    
300     </body>
301     </section>
302     <section>
303 fox2mike 1.35 <title>usermode-sources</title>
304 swift 1.33 <body>
305    
306     <p>
307 swift 1.53 <c>usermode-sources</c> are the User Mode Linux kernel patches. This
308 fox2mike 1.35 kernel is designed to allow Linux to run within Linux to run within Linux
309     to ... User Mode Linux is intended for testing and virtual server support.
310 swift 1.53 For more information about this amazing tribute to the stability and
311     scalability of Linux, see <uri>http://user-mode-linux.sourceforge.net</uri>.
312 swift 1.33 </p>
313    
314     <p>
315 swift 1.53 For more information on UML and Gentoo, read the
316 fox2mike 1.35 <uri link="/doc/en/uml.xml">Gentoo UML Guide</uri>.
317 swift 1.33 </p>
318    
319     </body>
320     </section>
321 nightmorph 1.45 <section>
322     <title>vanilla-sources</title>
323     <body>
324    
325     <p>
326     The next kernel sources that many of you will probably be familiar with as Linux
327     users are the <c>vanilla-sources</c>. These are the official kernel sources
328     released on <uri>http://www.kernel.org/</uri>. Please note that we do not patch
329     these kernels at all - these are purely for people who wish to run a completely
330     unmodified Linux kernel. We recommend that you use <c>gentoo-sources</c>
331     instead.
332     </p>
333    
334     <p>
335 nightmorph 1.54 Two versions of the kernel can be found under this package: 2.4 and 2.6.
336 nightmorph 1.45 </p>
337    
338     </body>
339     </section>
340 nightmorph 1.58 <section>
341     <title>zen-sources</title>
342     <body>
343    
344     <p>
345     <c>zen-sources</c> is designed for desktop systems. It includes code not found
346     in the mainline kernel. The zen kernel has patches that add new features,
347     support additional hardware, and contain various tweaks for desktops.
348     </p>
349    
350     </body>
351     </section>
352 swift 1.1 </chapter>
353 swift 1.17
354     <chapter>
355     <title>Previously provided kernel packages</title>
356     <section>
357 swift 1.20 <title>aa-sources</title>
358     <body>
359    
360     <p>
361     <c>aa-sources</c> was a heavily modified kernel with all kinds of patches.
362     The upstream maintainer has stopped releasing kernel patchsets, this package
363     was removed as it went out of date.
364     </p>
365    
366     </body>
367     </section>
368     <section>
369     <title>alpha-sources</title>
370     <body>
371    
372     <p>
373     <c>alpha-sources</c> was a 2.4 kernel with patches applied to improve hardware
374     compatibility for the Alpha architecture. These patches have been developed
375     and included in the mainline kernel. Alpha users can now run any recent kernel
376     with no need for extra patches.
377     </p>
378    
379     </body>
380     </section>
381     <section>
382 swift 1.24 <title>development-sources</title>
383     <body>
384    
385     <p>
386     <c>development-sources</c>, the official 2.6 kernel from kernel.org, can now
387     be found under the <c>vanilla-sources</c> package.
388     </p>
389    
390     </body>
391     </section>
392     <section>
393 alin 1.28 <title>gentoo-dev-sources</title>
394 swift 1.24 <body>
395    
396     <p>
397 alin 1.28 <c>gentoo-dev-sources</c>, a 2.6 kernel patched with bug, security and
398 swift 1.24 stability fixes, can now be found under the <c>gentoo-sources</c> package.
399     </p>
400    
401     </body>
402     </section>
403     <section>
404 fox2mike 1.35 <title>grsec-sources</title>
405     <body>
406    
407     <p>
408     The <c>grsec-sources</c> kernel source used to be patched with the latest
409     grsecurity updates (grsecurity version 2.0 and up) which included, amongst
410     other security-related patches, support for PaX. As grsecurity patches are
411     included in <c>hardened-sources</c>, this package is no longer in Portage.
412     </p>
413    
414     </body>
415     </section>
416     <section>
417 fox2mike 1.31 <title>hardened-dev-sources</title>
418     <body>
419    
420     <p>
421     <c>hardened-dev-sources</c> can now be found under the <c>hardened-sources</c>
422     package.
423     </p>
424    
425     </body>
426     </section>
427     <section>
428 nightmorph 1.56 <title>hppa-sources</title>
429     <body>
430    
431     <p>
432     <c>hppa-sources</c> was a 2.6 kernel with patches applied to improve hardware
433     compatibility for the HPPA architecture. These patches have been developed
434     and included in the mainline kernel. HPPA users can now run any recent kernel
435     with no need for extra patches.
436     </p>
437    
438     </body>
439     </section>
440     <section>
441 swift 1.24 <title>rsbac-dev-sources</title>
442     <body>
443    
444     <p>
445     The <c>rsbac-dev-sources</c> kernels can now be found under the
446     <c>rsbac-sources</c> package.
447     </p>
448    
449     </body>
450     </section>
451     <section>
452 nightmorph 1.56 <title>rsbac-sources</title>
453     <body>
454    
455     <p>
456     <c>rsbac-sources</c> was a 2.6-based kernel. It contained patches to use Rule
457     Set Based Access Controls (<uri link="http://www.rsbac.org">RSBAC</uri>). It has
458     been removed due to lack of maintainers. Use <c>hardened-sources</c> if you need
459     additional security features.
460     </p>
461    
462     </body>
463     </section>
464     <section>
465 swift 1.20 <title>selinux-sources</title>
466     <body>
467    
468     <p>
469     <c>selinux-sources</c>, a 2.4 kernel including lots of security enhancements,
470 fox2mike 1.32 has been obsoleted by security development in the 2.6 tree. SELinux
471 fox2mike 1.31 functionality can be found in the <c>hardened-sources</c> package.
472 swift 1.18 </p>
473    
474     </body>
475     </section>
476 fox2mike 1.35 <section>
477 nightmorph 1.57 <title>sh-sources</title>
478     <body>
479    
480     <p>
481     <c>sh-sources</c> was a 2.6 kernel with patches applied to improve hardware
482     compatibility for the SuperH architecture. These patches have been developed
483     and included in the mainline kernel. SuperH users can now run any recent kernel
484     with no need for extra patches.
485     </p>
486    
487     </body>
488     </section>
489     <section>
490 fox2mike 1.40 <title>uclinux-sources</title>
491     <body>
492    
493     <p>
494     The <c>uclinux-sources</c> are meant for CPUs without MMUs as well as embedded
495     devices. For more information, see <uri>http://www.uclinux.org</uri>. Lack of
496 swift 1.53 security patches as well as hardware to test on were the reasons this is no
497     longer in the tree.
498 fox2mike 1.40 </p>
499    
500     </body>
501     </section>
502     <section>
503 fox2mike 1.35 <title>win4lin-sources</title>
504     <body>
505    
506     <p>
507 swift 1.53 <c>win4lin-sources</c> were patched to support the userland win4lin tools
508 fox2mike 1.35 that allow Linux users to run many Microsoft Windows (TM) applications
509     at almost native speeds. This was removed due to security issues.
510     </p>
511    
512     </body>
513     </section>
514 swift 1.17 </chapter>
515 swift 1.1 </guide>

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