Linux Tiny

Introduction
The linux-tiny patchset is a series of patches against the 2.6 mainline Linux kernel to reduce its memory and disk footprint, 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 handhelds.

To the degree possible, the patchset should serve as a staging ground for patches, until they can be mainlined. Therefore, over time the set of patches will fluctuate as new patches are submitted, and other patches are mainlined.

Resources

 * Project home page: Linux Tiny
 * Project mailing list: Mailing List
 * A Linux Weekly News article about the project is at: LWN Article (Dec 2003)
 * [[Image:Alert.gif]] Linux-tiny Presentation by Matt Mackall, delivered at CELF's Technical Conference in April 2005.
 * presentation given by Tim Bird at the Japan Technical Jamboree #16 in August 2007
 * This presentation describes the current status of the Linux-tiny patches, describes the improved memory accounting feature, gives some size number for various config options, and describes the project revival effort.

Original Announcements and e-mail
The original (Dec 11, 2003) announcement about the patchset, to the kernel mailing list, is available here:
 * Announcement

Here are some other announcements from Matt Mackall to LKML:
 * 2.6.0-tiny1 Dec 27, 2003
 * 2.6.1-rc1-tin1 Jan 2, 2004
 * 2.6.1-rc1-tiny2 Jan 6, 2004

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.

Last release (for 2.6.22.5)
A recent Linux-tiny patchset release is available here: [[Media:Tiny-quilt-2.6.22.5-1.tar.gz]]

See Linux Tiny Patch Details for information about the status of individual sub-patches.

Installation Instructions
These instructions were for the Linux-tiny release for 2.6.22.5. Adjust accordingly for a different kernel version.

To apply the above patches, you need the referenced kernel (2.6.22) and quilt. Follow these steps:
 * wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.22.tar.bz2
 * tar -xjf linux-2.6.22.tar.bz2
 * wget http://www.kernel.org/pub/linux/kernel/v2.6/patch-2.6.22.5.bz2
 * wget http://elinux.org/images/7/79/Tiny-quilt-2.6.22.5-1.tar.gz
 * cd linux-2.6.22
 * bzcat ../patch-2.6.22.5.bz2 | patch -p1
 * tar -xzf ../Tiny-quilt-2.6.22-5-1.tar.gz
 * quilt push -a
 * cd ..
 * mv linux-2.6.22 linux-2.6.22.5-tiny1

Auxiliary tools
Here is a short shell script for making a tiny-quilt release: [[Media:release-tiny]]

Older releases

 * Linux 2.6.22.1:
 * [[Media:Tiny-quilt-2.6.22.1-1.tar.gz]]
 * Linux 2.6.16.19
 * broken-out patchset: [[Media:2.6.16.19-tiny1-broken-out.tar.bz2|2.6.16.19-tiny1-broken-out]]
 * Porting notes: [[Media:linuxtinyNOTES.txt|notes]]
 * Linux 2.6.0 to 2.6.14:
 * Older Linux-tiny patchsets can be downloaded from: Linux Tiny Patchset

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
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

There are some miscellaneous usage notes at: Linux Tiny Notes

Ideas and patch candidates
See Linux Tiny Patch Ideas

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