1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
2 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4 <html xmlns="http://www.w3.org/1999/xhtml">
7 <title>The Linux kernel in Debian - Ben Hutchings - DebConf 11</title>
9 <meta name="generator" content="S5" />
10 <meta name="version" content="S5 1.1" />
11 <meta name="author" content="Ben Hutchings" />
12 <!-- configuration parameters -->
13 <meta name="defaultView" content="slideshow" />
14 <meta name="controlVis" content="hidden" />
15 <!-- style sheet links -->
16 <link rel="stylesheet" href="s5-blank/ui/default/slides.css" type="text/css" media="projection" id="slideProj" />
17 <link rel="stylesheet" href="s5-blank/ui/default/outline.css" type="text/css" media="screen" id="outlineStyle" />
18 <link rel="stylesheet" href="s5-blank/ui/default/print.css" type="text/css" media="print" id="slidePrint" />
19 <link rel="stylesheet" href="s5-blank/ui/default/opera.css" type="text/css" media="projection" id="operaFix" />
20 <style type="text/css">
21 .logo { position: absolute; right: 0; top: 0; height: 100% }
22 table { border-collapse: collapse }
23 th { border-bottom: 2pt solid black }
24 th, td { padding: 0 6pt }
26 <style type="text/css" media="print">
27 .slide { page-break-after: always }
30 <script src="s5-blank/ui/default/slides.js" type="text/javascript"></script>
35 <div id="controls"><!-- DO NOT EDIT --></div>
36 <div id="currentSlide"><!-- DO NOT EDIT --></div>
38 <object class="logo" data="debconf11.svg"></object>
42 <h2>The Linux kernel in Debian</h2>
47 <div class="presentation">
50 <h1>The Linux kernel in Debian</h1>
51 <object data="tux-debian.svg" width="35%" align="right"></object>
52 <h3>Ben Hutchings</h3>
57 <ul class="incremental">
59 Professional software developer since 1998
62 Debian contributor since 2003
65 Regular Linux contributor since 2008
68 Maintaining a net driver in my day job, plus core networking
69 and PCI code as necessary
74 Debian kernel contributor since 2008; uploader since 2009
75 <ul class="incremental">
77 Initially trying to deal with the non-free firmware issue
80 Moved on to triaging bugs, fixing bugs, backporting
81 features, updating packaging...
90 <ul class="incremental">
92 Started by Linus Torvalds in 1991 as a kernel for i386
93 PCs: <q>just a hobby, won't be big and professional like gnu</q>
96 Adopted as the kernel of the Debian system in 1993
99 After 20 years' development, supports more hardware
100 architectures and devices than anything else
101 <ul class="incremental">
103 Hardware vendors <em>must</em> provide Linux drivers because
104 their customers demand it
109 Still the default kernel for the Debian system
115 <h1>Linux release model (1)</h1>
119 <ul class="incremental">
121 Each stable release had even second component. Bug fixes and
122 minor features in stable releases with third component
123 incremented (e.g. 2.4.27)
126 Major development done separately, resulting in series of
127 unstable releases with odd second component (e.g. 2.5.50)
130 After a year or two, development resulted in a new stable
134 Problem: users waited years for new features, and then got many
135 more changes all at once. Particularly bad in the 2.4-2.6
142 <h1>Linux release model (2)</h1>
146 <ul class="incremental">
148 Development results in a new stable(-ish) release every 2-3
150 <ul class="incremental">
152 git (and previously BitKeeper) made distributed development
153 and testing a lot easier
158 Each 2.6.<var>x</var> release has stable update branch; releases
159 numbered 2.6.<var>x</var>.<var>y</var>
160 <ul class="incremental">
162 Usually closed shortly after next stable release, but may
163 continue as a 'longterm' branch (e.g. 2.6.32.<var>y</var>)
168 Linux 3.0 doesn't change this, except that <var>x</var> is now
169 the second component and <var>y</var> is the third
175 <h1>Debian kernel team (1)</h1>
179 <ul class="incremental">
181 Currently 5 general maintainers: Maximilian Attems, Bastian
182 Blank, dann frazier, Moritz Muehlenhoff and me
185 Many more specialised contributors:
187 <li>Specific architectures</li>
188 <li>Specific features (e.g. Xen)</li>
193 Would appreciate more help, particularly with bug triage and
200 <h1>Debian kernel team (2)</h1>
204 <ul class="incremental">
206 Bug triage - takes a huge amount of time
209 Backport bug fixes and features - particularly new hardware
211 <ul class="incremental">
212 <li>...while trying not to change kernel ABI in stable</li>
216 Update build configurations for each new upstream release -
217 e.g. to enable new drivers
220 Try to ensure smooth upgrades when there are major
221 implementation changes - e.g. KMS, switch to libata drivers
224 Integrate <em>some</em> features not accepted upstream
230 <h1>Official Linux kernel packages (1)</h1>
232 Main source package is linux-2.6 (still!). Most binary package
233 names change regularly.
235 <ul class="incremental">
237 linux-image-<var>upstream</var>-<var>abi</var>-<var>flavour</var>
238 - compiled kernel and modules
241 linux-headers-<var>upstream</var>-<var>abi</var>-<var>flavour</var>
242 (and others) - development package for OOT modules
245 linux-libc-dev - headers for userland
248 linux-source-<var>upstream</var> - for custom kernels
251 linux-doc-<var>upstream</var>, linux-tools-<var>upstream</var>,
255 linux-support-<var>upstream</var>-<var>abi</var> - scripts and
256 metadata to support linux-latest-2.6
262 <h1>Official Linux kernel packages (2)</h1>
264 The linux-latest-2.6 source package builds meta-packages to
265 support automatic upgrades between binaries built from linux-2.6.
267 <ul class="incremental">
269 linux-image-<var>flavour</var>
272 linux-headers-<var>flavour</var>
275 linux-source, linux-doc, linux-tools, etc.
278 <p class="incremental">
279 The installer will normally install linux-image-<var>flavour</var>
280 (for some appropriate <var>flavour</var>).
285 <h1>Official Linux kernel packages (3)</h1>
286 <ul class="incremental">
288 firmware-free - separate 'firmware' compliant with DFSG
291 linux-base - base package for images and tools
294 linux-kbuild-2.6 builds linux-kbuild-<var>upstream</var> -
295 code used for building OOT modules
301 <h1>Custom Linux kernel packages</h1>
305 <h1>Out-of-tree modules</h1>
309 <h1>Firmware files</h1>
313 <h1>Documentation</h1>
324 Linux 'Tux' logo © Larry Ewing, Simon Budig.
326 Redistribution is free but has to include this notice.
329 <li>Modified by me to add Debian open-ND logo</li>
333 Debian open-ND logo © Software in the Public Interest, Inc.
335 Permission is hereby granted, free of charge, to any person obtaining
336 a copy of this software and associated documentation files (the
337 "Software"), to deal in the Software without restriction, including
338 without limitation the rights to use, copy, modify, merge, publish,
339 distribute, sublicense, and/or sell copies of the Software, and to
340 permit persons to whom the Software is furnished to do so, subject to
341 the following conditions:
343 The above copyright notice and this permission notice shall be
344 included in all copies or substantial portions of the Software.
346 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
347 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
348 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
349 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
350 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
351 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
352 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
356 DebConf 11 logo © Aurélio A. Heckert.
358 This program is free software; you can redistribute it
359 and/or modify it under the terms of the GNU General Public
360 License as published by the Free Software Foundation;
361 version 2 of the License.
363 This program is distributed in the hope that it will be
364 useful, but WITHOUT ANY WARRANTY; without even the implied
365 warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
366 PURPOSE. See the GNU General Public License for more
369 You should have received a copy of the GNU General Public
370 License along with this package; if not, write to the Free
371 Software Foundation, Inc., 51 Franklin St, Fifth Floor,
372 Boston, MA 02110-1301 USA
374 On Debian systems, the full text of the GNU General Public
375 License version 2 can be found in the file
376 `/usr/share/common-licenses/GPL-2'.
379 <li>Resized and coloured by me</li>