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Old 03-02-2002, 06:21 PM   #1
Registered: Mar 2002
Location: San Francisco, CA
Distribution: Open/FreeBSD, Gentoo, SuSE
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Exclamation BIOS > Kernel - Mp3

How would one go about configuring a machine to boot from bios directly to the kernel? My goal is to speed up bootup process for a car mp3 player. Any Additional Ideas on increasing boot up speed?

Old 03-02-2002, 06:23 PM   #2
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unless you specify for the bios to boot or search other boot devices.. it should boot directly to the kernel, or at least start loading linux.. the only way to speed up the boot process is to limit what your loading into the kernel.. and services starting..

Old 03-02-2002, 06:59 PM   #4
Registered: Mar 2002
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Thanks! This is the first board i've registered on thats actaully active

As far as the first reply I received on this topic... How would bios know how to load vmlinuz? I've done SOME reading (and i plan on reading a LOT more after i finish this post) and i've heard some talk about how bios reads into the mbr of the bootup device selected and that if the kernel was in the mbr (o cylinder/ 0 sector(?)) it'll boot it up.. but how do you can the kernel to be placed at the very beginning of the drive?

Im sure the documents im about to read will help out but help from the community is more exciting

Im going to go get learned now.
Old 03-05-2002, 05:32 AM   #5
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The speed difference you would win with placing your kernel in sector 0 instead of the bootloader is so minimal you wouldn't even notice the difference. If you have set the bootloader to no delay then it will instantly start loading the kernel. I'd say on a reasonable computer that would take maybe a few microseconds, if not nanoseconds.
You would win a lot more speed by doing what trickykid suggested. If it's a kernel just for playing mp3's I'm sure you could get the kernel smaller then 400k. You might also want to hack into all your bootscripts since a standard distribution will do a bunch of extra checks on bootup which you might not really need.
You might want to read the following howto

It explains the whole bootprocess which might help you to find out which parts you could skip.


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