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Thread: starting linuxrc and init

  1. #1
    Junior Member
    Join Date
    Jan 2003
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    1

    starting linuxrc and init

    Hi Folks,
    I try to build my own Knoppix based CD. For this I try to build my own initrd.
    Ok my first problem was that the kernel didn't start my linuxrc. I found the reason. If the
    root-Filesystem (root= parameter from syslinux) is the same as ram0 (in my case the initrd-fs) the kernel didn't execute linuxrc and step over to execute init.
    (this is in do_mounts.c in function "void prepare_namespace(void)" - Linux 2.4.20)

    Ok.. I that this is no problem. I will pass no root boot option (or a wrong) and I'll set this in linuxrc but... in this case the kernel stops because he couldn't load modules and other messages (depending with root-option you give)

    My question: Do you know how knoppix handle this issue?

    Thanks,
    Thomas

  2. #2
    Senior Member registered user
    Join Date
    Nov 2002
    Location
    Auckland, New Zealand
    Posts
    818
    You are probally best to start off by remastering before trying to build one from scratch.
    see http://www.knoppix.net/docs/index.ph...masteringHowto

    also you may be interested to see how to replace the kernel :
    http://www.knoppix.net/docs/index.ph...tomKernelHowto

  3. #3
    Guest
    Hi eadz,

    thx for posting a reply. I read the both Webpages, but they didn't cover my questions.

    It would be cool if someone has an idea how to solve this prob.


    Thanks,
    Thomas

  4. #4
    Senior Member registered user
    Join Date
    Dec 2002
    Posts
    196

    Re: starting linuxrc and init

    Quote Originally Posted by thomas
    Hi Folks,
    I try to build my own Knoppix based CD. For this I try to build my own initrd.
    Ok my first problem was that the kernel didn't start my linuxrc. I found the reason. If the
    root-Filesystem (root= parameter from syslinux) is the same as ram0 (in my case the initrd-fs) the kernel didn't execute linuxrc and step over to execute init.
    (this is in do_mounts.c in function "void prepare_namespace(void)" - Linux 2.4.20)

    Ok.. I that this is no problem. I will pass no root boot option (or a wrong) and I'll set this in linuxrc but... in this case the kernel stops because he couldn't load modules and other messages (depending with root-option you give)
    Okay, i'll give it a shot. If i understand correctly, you are trying to boot your initrd filesystem with the root= option. However, to load a filesystem into ram to boot with (as root), you need the initrd= kerneloption instead. Then, linuxrc should be executed like usual.

    Hope this helps,

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