/[gentoo]/xml/htdocs/proj/en/glep/glep-0026.html
Gentoo

Contents of /xml/htdocs/proj/en/glep/glep-0026.html

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1.3 - (hide annotations) (download) (as text)
Tue Oct 10 20:25:14 2006 UTC (8 years, 2 months ago) by g2boojum
Branch: MAIN
Changes since 1.2: +279 -36 lines
File MIME type: text/html
regenerate all .html files

1 g2boojum 1.1 <?xml version="1.0" encoding="utf-8" ?>
2     <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
3     <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
4     <!--
5     This HTML is auto-generated. DO NOT EDIT THIS FILE! If you are writing a new
6     PEP, see http://www.python.org/peps/pep-0001.html for instructions and links
7     to templates. DO NOT USE THIS HTML FILE AS YOUR TEMPLATE!
8     -->
9     <head>
10     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
11 g2boojum 1.3 <meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
12 g2boojum 1.1 <title>GLEP 26 -- Handling kernels with portage</title>
13 g2boojum 1.3 <style type="text/css">
14    
15     /*
16     :Author: David Goodger
17     :Contact: goodger@users.sourceforge.net
18     :date: $Date: 2003/06/02 17:03:08 $
19     :version: $Revision: 1.1 $
20     :copyright: This stylesheet has been placed in the public domain.
21    
22     Default cascading style sheet for the PEP HTML output of Docutils.
23     */
24    
25     .first {
26     margin-top: 0 }
27    
28     .last {
29     margin-bottom: 0 }
30    
31     .navigation {
32     width: 100% ;
33     background: #cc99ff ;
34     margin-top: 0px ;
35     margin-bottom: 0px }
36    
37     .navigation .navicon {
38     width: 150px ;
39     height: 35px }
40    
41     .navigation .textlinks {
42     padding-left: 1em ;
43     text-align: left }
44    
45     .navigation td, .navigation th {
46     padding-left: 0em ;
47     padding-right: 0em ;
48     vertical-align: middle }
49    
50     .rfc2822 {
51     margin-top: 0.5em ;
52     margin-left: 0.5em ;
53     margin-right: 0.5em ;
54     margin-bottom: 0em }
55    
56     .rfc2822 td {
57     text-align: left }
58    
59     .rfc2822 th.field-name {
60     text-align: right ;
61     font-family: sans-serif ;
62     padding-right: 0.5em ;
63     font-weight: bold ;
64     margin-bottom: 0em }
65    
66     a.toc-backref {
67     text-decoration: none ;
68     color: black }
69    
70     body {
71     margin: 0px ;
72     margin-bottom: 1em ;
73     padding: 0px }
74    
75     dd {
76     margin-bottom: 0.5em }
77    
78     div.section {
79     margin-left: 1em ;
80     margin-right: 1em ;
81     margin-bottom: 1.5em }
82    
83     div.section div.section {
84     margin-left: 0em ;
85     margin-right: 0em ;
86     margin-top: 1.5em }
87    
88     div.abstract {
89     margin: 2em 5em }
90    
91     div.abstract p.topic-title {
92     font-weight: bold ;
93     text-align: center }
94    
95     div.attention, div.caution, div.danger, div.error, div.hint,
96     div.important, div.note, div.tip, div.warning {
97     margin: 2em ;
98     border: medium outset ;
99     padding: 1em }
100    
101     div.attention p.admonition-title, div.caution p.admonition-title,
102     div.danger p.admonition-title, div.error p.admonition-title,
103     div.warning p.admonition-title {
104     color: red ;
105     font-weight: bold ;
106     font-family: sans-serif }
107    
108     div.hint p.admonition-title, div.important p.admonition-title,
109     div.note p.admonition-title, div.tip p.admonition-title {
110     font-weight: bold ;
111     font-family: sans-serif }
112    
113     div.figure {
114     margin-left: 2em }
115    
116     div.footer, div.header {
117     font-size: smaller }
118    
119     div.footer {
120     margin-left: 1em ;
121     margin-right: 1em }
122    
123     div.system-messages {
124     margin: 5em }
125    
126     div.system-messages h1 {
127     color: red }
128    
129     div.system-message {
130     border: medium outset ;
131     padding: 1em }
132    
133     div.system-message p.system-message-title {
134     color: red ;
135     font-weight: bold }
136    
137     div.topic {
138     margin: 2em }
139    
140     h1 {
141     font-family: sans-serif ;
142     font-size: large }
143    
144     h2 {
145     font-family: sans-serif ;
146     font-size: medium }
147    
148     h3 {
149     font-family: sans-serif ;
150     font-size: small }
151    
152     h4 {
153     font-family: sans-serif ;
154     font-style: italic ;
155     font-size: small }
156    
157     h5 {
158     font-family: sans-serif;
159     font-size: x-small }
160    
161     h6 {
162     font-family: sans-serif;
163     font-style: italic ;
164     font-size: x-small }
165    
166     .section hr {
167     width: 75% }
168    
169     ol.simple, ul.simple {
170     margin-bottom: 1em }
171    
172     ol.arabic {
173     list-style: decimal }
174    
175     ol.loweralpha {
176     list-style: lower-alpha }
177    
178     ol.upperalpha {
179     list-style: upper-alpha }
180    
181     ol.lowerroman {
182     list-style: lower-roman }
183    
184     ol.upperroman {
185     list-style: upper-roman }
186    
187     p.caption {
188     font-style: italic }
189    
190     p.credits {
191     font-style: italic ;
192     font-size: smaller }
193    
194     p.label {
195     white-space: nowrap }
196    
197     p.topic-title {
198     font-family: sans-serif ;
199     font-weight: bold }
200    
201     pre.line-block {
202     font-family: serif ;
203     font-size: 100% }
204    
205     pre.literal-block, pre.doctest-block {
206     margin-left: 2em ;
207     margin-right: 2em ;
208     background-color: #eeeeee }
209    
210     span.classifier {
211     font-family: sans-serif ;
212     font-style: oblique }
213    
214     span.classifier-delimiter {
215     font-family: sans-serif ;
216     font-weight: bold }
217    
218     span.interpreted {
219     font-family: sans-serif }
220    
221     span.option-argument {
222     font-style: italic }
223    
224     span.pre {
225     white-space: pre }
226    
227     span.problematic {
228     color: red }
229    
230     table {
231     margin-top: 0.5em ;
232     margin-bottom: 0.5em }
233    
234     td, th {
235     padding-left: 0.5em ;
236     padding-right: 0.5em ;
237     vertical-align: top }
238    
239     td.num {
240     text-align: right }
241    
242     th.field-name {
243     font-weight: bold ;
244     text-align: left ;
245     white-space: nowrap }
246    
247     h1 tt, h2 tt, h3 tt, h4 tt, h5 tt, h6 tt {
248     font-size: 100% }
249    
250     tt {
251     background-color: #eeeeee }
252    
253     ul.auto-toc {
254     list-style-type: none }
255    
256     </style>
257 g2boojum 1.1 </head>
258     <body bgcolor="white">
259     <table class="navigation" cellpadding="0" cellspacing="0"
260     width="100%" border="0">
261     <tr><td class="navicon" width="150" height="35">
262     <a href="http://www.gentoo.org/" title="Gentoo Linux Home Page">
263     <img src="http://www.gentoo.org/images/gentoo-new.gif" alt="[Gentoo]"
264     border="0" width="150" height="35" /></a></td>
265     <td class="textlinks" align="left">
266     [<b><a href="http://www.gentoo.org/">Gentoo Linux Home</a></b>]
267 g2boojum 1.3 [<b><a href="http://www.gentoo.org/peps">GLEP Index</a></b>]
268     [<b><a href="http://www.gentoo.org/proj/en/glep/glep-0026.txt">GLEP Source</a></b>]
269 g2boojum 1.1 </td></tr></table>
270 g2boojum 1.3 <table class="rfc2822 docutils field-list" frame="void" rules="none">
271 g2boojum 1.1 <col class="field-name" />
272     <col class="field-body" />
273     <tbody valign="top">
274     <tr class="field"><th class="field-name">GLEP:</th><td class="field-body">26</td>
275     </tr>
276     <tr class="field"><th class="field-name">Title:</th><td class="field-body">Handling kernels with portage</td>
277     </tr>
278 g2boojum 1.2 <tr class="field"><th class="field-name">Version:</th><td class="field-body">1.2</td>
279 g2boojum 1.1 </tr>
280 g2boojum 1.3 <tr class="field"><th class="field-name">Last-Modified:</th><td class="field-body"><a class="reference" href="http://www.gentoo.org/cgi-bin/viewcvs.cgi/xml/htdocs/proj/en/glep/glep-0026.txt?cvsroot=gentoo">2004/11/11 21:32:21</a></td>
281 g2boojum 1.1 </tr>
282     <tr class="field"><th class="field-name">Author:</th><td class="field-body">Nathaniel McCallum &lt;npmccallum&#32;&#97;t&#32;gentoo.org&gt;, Joshua Campbell &lt;warpzero&#32;&#97;t&#32;gentoo.org&gt;</td>
283     </tr>
284 g2boojum 1.2 <tr class="field"><th class="field-name">Status:</th><td class="field-body">deferred</td>
285 g2boojum 1.1 </tr>
286     <tr class="field"><th class="field-name">Type:</th><td class="field-body">Standards Track</td>
287     </tr>
288 g2boojum 1.3 <tr class="field"><th class="field-name">Content-Type:</th><td class="field-body"><a class="reference" href="glep-0002.html">text/x-rst</a></td>
289 g2boojum 1.1 </tr>
290     <tr class="field"><th class="field-name">Created:</th><td class="field-body">2-May-2004</td>
291     </tr>
292 g2boojum 1.2 <tr class="field"><th class="field-name">Post-History:</th><td class="field-body">2-May-2004, 11-Nov-2004</td>
293 g2boojum 1.1 </tr>
294     </tbody>
295     </table>
296     <hr />
297 g2boojum 1.3 <div class="contents topic">
298     <p class="topic-title first"><a id="contents" name="contents">Contents</a></p>
299 g2boojum 1.1 <ul class="simple">
300     <li><a class="reference" href="#abstract" id="id2" name="id2">Abstract</a></li>
301 g2boojum 1.2 <li><a class="reference" href="#status" id="id3" name="id3">Status</a></li>
302     <li><a class="reference" href="#motivation" id="id4" name="id4">Motivation</a></li>
303     <li><a class="reference" href="#specification" id="id5" name="id5">Specification</a></li>
304     <li><a class="reference" href="#rationale" id="id6" name="id6">Rationale</a></li>
305     <li><a class="reference" href="#backwards-compatibility" id="id7" name="id7">Backwards Compatibility</a></li>
306     <li><a class="reference" href="#reference-implementation" id="id8" name="id8">Reference Implementation</a></li>
307     <li><a class="reference" href="#copyright" id="id9" name="id9">Copyright</a></li>
308 g2boojum 1.1 </ul>
309     </div>
310 g2boojum 1.3 <div class="section">
311     <h1><a class="toc-backref" href="#id2" id="abstract" name="abstract">Abstract</a></h1>
312 g2boojum 1.1 <p>This GLEP proposes to create a more consistent handling of kernels and kernel building.
313     Currently &quot;emerge kernel-name&quot; only installs the sources and does not build anything.
314 g2boojum 1.3 &quot;emerge kernel-name&quot; should install only sources OR only a binary kernel, its modules,
315 g2boojum 1.1 and a tarballed package of kernel-headers, depending on USE flag.</p>
316     </div>
317 g2boojum 1.3 <div class="section">
318     <h1><a class="toc-backref" href="#id3" id="status" name="status">Status</a></h1>
319 g2boojum 1.2 <p>Timed out</p>
320     </div>
321 g2boojum 1.3 <div class="section">
322     <h1><a class="toc-backref" href="#id4" id="motivation" name="motivation">Motivation</a></h1>
323 g2boojum 1.1 <p>Currently, the only automated kernel build proceedure that we have is genkernel. While
324     genkernel is a great tool, its main weakness is that it does not port well to other
325     arches because of the initrd and the lack of good &quot;generic&quot; settings for other arches.
326     This GLEP hopes to overcome this by abstracting the various layers of genkernel and
327     implementing the most common aspect (the build proceedure) into a portage eclass.</p>
328     </div>
329 g2boojum 1.3 <div class="section">
330     <h1><a class="toc-backref" href="#id5" id="specification" name="specification">Specification</a></h1>
331 g2boojum 1.1 <p>There would be 3 layers to kernel building: (place of implementation)</p>
332     <blockquote>
333     <ul class="simple">
334     <li>Stage 1 - Configuring the kernel (optional) -- external utility</li>
335     <li>Stage 2 - Building the kernel -- in an eclass</li>
336     <li>Stage 3 - Building the initrd (optional) -- in an ebuild</li>
337     </ul>
338     </blockquote>
339     <p>Stages 1 and 3 are optional on most arches.</p>
340     <p>Stage 1 would be achieved through a seperate utility (perhaps like the current
341     genkernel). This utility would help the user configure the kernel and any kernel/build
342     related settings. This stage is optional and would only be used if a person wanted a
343 g2boojum 1.3 customized kernel settings. One optional thought is to have this utility a part of the
344 g2boojum 1.1 base Gentoo system. That way there are less steps to make a custom kernel.</p>
345     <p>Stage 2 would be implimented through an eclass. This stage is not optional. One would
346     perform this step by typing &quot;emerge kernel-name&quot;, where &quot;kernel-name&quot; is the name of
347     the kernel package you want to use (ie. &quot;gentoo-dev&quot;). This package would have a
348     &quot;buildkernel&quot; USE flag. If the flag was not set, it would simply download and install
349 g2boojum 1.3 sources like we do currently. However, if the &quot;buildkernel&quot; flag is set, portage will
350 g2boojum 1.1 perform the following steps:</p>
351     <blockquote>
352     <ol class="arabic simple">
353     <li>(as a dependency) download and install a tarball of &quot;generic&quot; kernel config files.</li>
354     <li>Check to see if customized kernel config/settings have been set via Stage 1.</li>
355     <li>Portage will use a custom config, if available. Otherwise, a &quot;generic&quot; config.</li>
356     <li>If neither a custom config or a &quot;generic&quot; config is available, die (with message).
357     This is needed as some arches don't/can't have &quot;generic&quot; configs, so they will
358     simply be presented a message telling them to run the utility from Stage 1 (which
359     they obviously skipped).</li>
360     <li>Build the kernel and modules and install them</li>
361     <li>Remove unnecessary files from the sources and tarball it as &quot;kernel-headers&quot;.
362     This tarball provides the appropriate files to build external modules against, like
363     nvidia-kernel, etc... The external modules (when built) will determine the running
364     kernel and unpack the appropriate tarball, to build against, then remove the files.</li>
365     </ol>
366     </blockquote>
367     <p>Stage 3 would merely be an ebuild that constructs an initrd image for either the running
368     kernel or, lacking a running kernel, the newest kernel installed (by version/date installed?).
369     Initrd's can't be used on all arches, so this ebuild can be keyword masked as appropriate.
370     The initrd package would also have a &quot;bootsplash&quot; USE flag (on x86, maybe others) that
371     would build in bootsplash support. Any non-default actions desired by the user can be
372     handled with the utility from Stage 1.</p>
373 g2boojum 1.3 <p>This would lead us to several case scenarios (assuming kernel-config is part of the base
374 g2boojum 1.1 system):</p>
375     <blockquote>
376     <ol class="arabic">
377     <li><p class="first">default kernel, no initrd: &quot;emerge gentoo-kernel&quot;</p>
378     </li>
379     <li><p class="first">default kernel, initrd: &quot;emerge aa-kernel initrd&quot;</p>
380     </li>
381     <li><p class="first">default kernel, bootsplash initrd: &quot;USE=bootsplash emerge mm-kernel initrd&quot;</p>
382     </li>
383 g2boojum 1.3 <li><dl class="first docutils">
384 g2boojum 1.1 <dt>non-default kernel, no initrd: &quot;kernel-config gentoo-dev-kernel&quot;</dt>
385     <dd><p class="first last">&quot;emerge gentoo-dev-kernel&quot;</p>
386     </dd>
387     </dl>
388     </li>
389 g2boojum 1.3 <li><dl class="first docutils">
390 g2boojum 1.1 <dt>non-default kernel, initrd: &quot;kernel-config alpha-kernel&quot;</dt>
391     <dd><p class="first last">&quot;emerge alpha-kernel initrd&quot;</p>
392     </dd>
393     </dl>
394     </li>
395     <li><p class="first">JUST sources, no binary &quot;USE=-buildkernel emerge grsec-kernel&quot;</p>
396     </li>
397     </ol>
398     </blockquote>
399     </div>
400 g2boojum 1.3 <div class="section">
401     <h1><a class="toc-backref" href="#id6" id="rationale" name="rationale">Rationale</a></h1>
402 g2boojum 1.1 <p>There are many advantages gained by this method:</p>
403     <blockquote>
404     <ol class="arabic simple">
405     <li>Full arch support (GentooInstaller really could use this)</li>
406     <li>More consistent with the rest of portage (installs binaries by building from source)</li>
407     <li>Better user experience</li>
408     <li>More flexability (genkernel forces building of initrd on x86)</li>
409     <li>Don't have to store full kernel sources (each source tree is ~200MB unpacked)</li>
410     <li>Creates the ability to make binary kernel packages for fast installs (think GRP kernel)</li>
411     <li>A seperate package for &quot;generic&quot; kernel config files gives us better version tracking</li>
412     </ol>
413     </blockquote>
414     <p>The major problem is, however, that we currently have two different build systems,
415     portage and genkernel. Having competing build systems is not a GoodThing TM. Therefore,
416     we can either make portage build kernels or we can make genkernel build everything else.</p>
417     </div>
418 g2boojum 1.3 <div class="section">
419     <h1><a class="toc-backref" href="#id7" id="backwards-compatibility" name="backwards-compatibility">Backwards Compatibility</a></h1>
420 g2boojum 1.1 <p>If you want to emerge kernel sources the old way, just do: USE=&quot;-buildkernel&quot; emerge kernel-name</p>
421 g2boojum 1.3 <p>Perhaps we could also name the new kernel-config program (from Stage 1) &quot;genkernel&quot; so that users
422 g2boojum 1.1 can have a seemless transition.</p>
423     </div>
424 g2boojum 1.3 <div class="section">
425     <h1><a class="toc-backref" href="#id8" id="reference-implementation" name="reference-implementation">Reference Implementation</a></h1>
426 g2boojum 1.1 <p>not yet ..</p>
427     </div>
428 g2boojum 1.3 <div class="section">
429     <h1><a class="toc-backref" href="#id9" id="copyright" name="copyright">Copyright</a></h1>
430 g2boojum 1.1 <p>This document has been placed in the public domain.</p>
431     </div>
432 g2boojum 1.3
433 g2boojum 1.1 </div>
434 g2boojum 1.3 <div class="footer">
435 g2boojum 1.2 <hr class="footer" />
436 g2boojum 1.1 <a class="reference" href="glep-0026.txt">View document source</a>.
437 g2boojum 1.3 Generated on: 2006-10-10 20:23 UTC.
438 g2boojum 1.1 Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
439 g2boojum 1.3
440 g2boojum 1.1 </div>
441     </body>
442     </html>

  ViewVC Help
Powered by ViewVC 1.1.20