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Old 08-29-2005, 07:31 PM   #1
kushalkoolwal
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Registered: Feb 2004
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Kernel Boot parameters sources?


I have seen loads of Linux error problem getting solved by giving proper Kernel boot parameters in the grub.conf or lilo.conf file like:

no lapic, pci=biosirq, vga=771, ide=nodma, and so on...

Does some know a proper source where we can get an entire list of such parameters? Does these option appear when we do make xconfig or make menuconfig? I have found some web-pages listing these options but none of them are comprehensive.

Also when we boot the kernel with these option exactly what change in kernel happens? Does the module get's disabled or some part of code is not executed?
 
Old 08-29-2005, 09:19 PM   #2
sundialsvcs
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I believe that you will find this (somewhat) documented in the /Documentation section of the Linux source-tree. (Look under /usr/src.)

Kernel parameters are not specified in make ...config, et al, and a moment's reflection will reveal why this is so. The purpose of a kernel-parameter is to provide some tidbit of information to the kernel, to init, or even (through /proc/cmdline, to running programs. This information is provided at boot-time and can be changed with each reboot. It doesn't have anything to do with how the kernel has been constructed ... as the various makes do.

Anyone can see what the parameter-string is. The mkinitrd script, the kernel, the init process, the /etc/rc.sysinit script, device-drivers, and any user-level program that reads /proc/cmdline can all refer to it.
 
  


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