Difference between revisions of "Linux Tiny"

From eLinux.org
Jump to: navigation, search
(Introduction: Updated - No more patch releases)
(Status: Removed the entire section (out of date))
Line 65: Line 65:
measure kernel size, and how to use the kernel patches and configuration items provided by Linux-tiny.
measure kernel size, and how to use the kernel patches and configuration items provided by Linux-tiny.
== Status ==
See [[Linux Tiny Patch Details]] for information about the status of individual sub-patches.
There are currently 77 patches in the Linux-tiny patch set.
Of these, 41 are "active".  Others are bitrotted or non-functional, and are only kept
in case someone wants to revive them in the future.
Here is a breakdown of patches by functionality:
{| border="1" cellspacing="0" cellpadding="5"
!Function Area!!Patch count
|moving inlines to out-of-line||4
|measurement and instrumentation||5
|make features or APIs optional||15
|reduced code||3
|reduce data structures||8
|reduce harware support||3
== Test Project and Results ==
== Test Project and Results ==

Revision as of 02:50, 9 February 2009


The goal of the linux-tiny project is to reduce the memory and disk footprint of the mainstream Linux kernel, as well as to add features to aid working on small systems. Target users are developers of embedded system and users of small or legacy machines such as 386s and handheld devices.

Patch releases against the mainstream Linux kernel have been discontinued. Instead of spending a valuable amount of time carrying patches forward from one kernel version to the next, we chose to focus on a few patches and spend our time trying to get them merged into the mainline kernel.




Last release (for 2.6.23)

A recent Linux-tiny patchset release is available here: Media:Tiny-quilt-2.6.23-0.tar.bz2

Installation Instructions

These instructions were for the Linux-tiny release for 2.6.23. Adjust accordingly for a different kernel version.

To apply the above patches, you need the referenced kernel (2.6.23) and quilt (overview). Follow these steps:

 $ wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.23.tar.bz2
 $ tar -xjf linux-2.6.23.tar.bz2
 $ wget http://elinux.org/images/3/3c/Tiny-quilt-2.6.23-0.tar.bz2
 $ cd linux-2.6.23
 $ tar -xjf ../Tiny-quilt-2.6.23-0.tar.bz2
 $ quilt push -a
 $ cd ..
 $ mv linux-2.6.23 linux-2.6.23-tiny1

Auxiliary tools (for Linux-tiny developers)

Here is a short shell script for making a tiny-quilt release: Media:release-tiny

Older releases

How to use

In the Kernel Size Tuning Guide, there is a lot of information about how to measure kernel size, and how to use the kernel patches and configuration items provided by Linux-tiny.

Test Project and Results

There is an test for Linux-tiny (and kernel configuration option results, in general). Some test results from this test are available from the CE Linux Forum test lab, at: http://testlab.celinuxforum.org/otlwiki/ConfigSizeTestResults

The CELF System Size working group has worked extensively with the Linux-tiny patch set. There is a script to produce a report of size reductions for the individual patches in the patchset, and results from various vendors about their use of Linux-tiny. See Linux Tiny Test Project

Old usage notes

There are some miscellaneous usage notes at: Linux Tiny Notes

Ideas and patch candidates

See Linux Tiny Patch Ideas


The Linux-tiny patches apply against the Linux kernel, and are provided under the GNU General Public License (GPL), version 2 only [1]. (This is the same license as the Linux kernel.)

Original Announcements and e-mail

The original (Dec 11, 2003) announcement about the patchset, to the kernel mailing list, is available here:

Here are some other announcements from Matt Mackall to LKML:

Recent discussion thread on lkml is summarized at: LKML Thread Summary. The thread is available at here.

Note that currently, the smallest kernel that is reported in this thread is 197K compressed.