building realtime kernel & remastering for tiny core linux

[Arslan S.]

i have setup a git repository at gitorious to host build scripts
https://gitorious.org/tinyrt

to download:

Code: [Select]

git clone git://gitorious.org/tinyrt/linux.gitor
click linux-->source tree and download master as tar.gz

just run ./build.sh

everything from downloading to packing is automated

pre-built rt kernel and modules images posted in contrib repository
http://distro.ibiblio.org/tinycorelinux/4.x/x86/contrib/rt-kernel/

you can use this script to remaster latest tiny core linux images
https://gitorious.org/tinyrt/linux/blobs/master/extra/remaster-core.sh

build concepts:

• latest stable linux kernel + tiny core linux patches + PREEMPT_RT patch
  
• tiny core linux kernel configure + the principle of disabling latency killer options as much as possible
• power management and cpu freq scaling is totally disabled, but your power buttons should work

read more about rt linux
https://rt.wiki.kernel.org/index.php/Main_Page

[Arslan S.]

first product of the project is hosted in kernel contrib repository and
a script is attached to first post to remaster latest tinycore/microcore images, it is useful because grub does not support multiple initrds, there is a way chainloading a bootloader supporting multiple initrds though

[curaga]

Grub is ok with merely cat'ed initrds though. cat tinycore.gz rt-modules.cpio.gz > tinycorert.gz

Less space efficient than repacking, but easier to do.

[tinypoodle]

unfortunately grub does not support multiple initrds so use the script attached to this post to remaster latest tinycore/microcore images

Oh? Rather surprising...
I simply tried to load 2 initrd's with linld which is ~5Kb and next to zero documented, and "it just works"   

[Arslan S.]

Grub is ok with merely cat'ed initrds though. cat tinycore.gz rt-modules.cpio.gz > tinycorert.gz

Less space efficient than repacking, but easier to do.

i tried cat'ing tinycore.gz with rt-modules.gz before but when i extract the output file i can not find the modules

[curaga]

i tried cat'ing tinycore.gz with rt-modules.gz before but when i extract the output file i can not find the modules

The gunzip/cpio tools can't handle that, the kernel can. That's why it's not so good format when you won't have the original files anymore.

[floppy]

unfortunately grub does not support multiple initrds so use the script attached to this post to remaster latest tinycore/microcore images

Oh? Rather surprising...
I simply tried to load 2 initrd's with linld which is ~5Kb and next to zero documented, and "it just works"   

how?

[tinypoodle]

initrd=tinycore.gz,initram2.gz

[Arslan S.]

version bump to 3.0
kernel is 3.0.32-x1-rt52 please see the first post

[ndrancs]

want to try to compile nvidia but no kernel headers for this rt kernel in the repo.

[curaga]

Just use the full kernel source.

[Arslan S.]

or use this tool to build your module
http://code.google.com/p/tc-ext-tools/source/detail?r=858

it is not tested for rt-kernel though

[ndrancs]

@Arslan S.
I've compiled all from scratch, using the script here and use tce-ext-tools revision 824, and the result is libGL.so* missing.
but I will try to use tce-ext-tools that revision 858. Thank you. 

[Arslan S.]

you should install Xorg-7.5 or Xorg-7.6 for libGL
also use the latest revision r858 is buggy

[webb]

hi arslan,

looks like a sweet project. unfortunately, i get many 404 not founds during the dl process. are you still maintaining this?

best,
webb