christopher pinon

Hi,

I don't have much experience in compiling custom kernels.

I'm running Slackware 10 on both an old i486 and a pentium 2. I would like
to compile a custom kernel (2.4.27) for the i486 to improve performance.
(The stock bare.i kernel works fine, but it contains a lot of drivers that
I don't need on my i486.) Since I don't have space for gcc and co. on the
i486, I want to compile the kernel for the i486 on my pentium 2. When
configuring the new kernel, I explicitly choose i486 as the processor
type. The compiliation (make dep, make bzImage, make modules) goes well,
but when I try to boot the new kernel on the i486 I get the following
error message:

Kernel panic: Kernel compiled for Pentium+, requires TSC features

This puzzles me, because (as I said) I explicitly chose i486 as the
processor type. Of course, I suspect that this error is related to the
fact that I'm actually compiling the kernel on my pentium 2.

I would like to ask what I'm doing wrong.

Thank you,
Christopher

daniel de kok

It tries to read the TSC (Time Stamp Counter).

Try to enable the "Unsynced TSC support" (CONFIG_X86_TSC_DISABLE) kernel
option from the "Processor type and features" section, and pass the
"notsc" parameter to the kernel.

With kind regards,
Daniel de Kok

neosadist

Try compiling it on the host machine then...

--
Authors (and perhaps columnists) eventually rise to the top of whatever
depths they were once able to plumb.
-- Stanley Kaufman

rm

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Try typing rdev /dev/hdnew vmlinuz on the new kernel. If the 486
is on /dev/hda1 then type rdev /dev/hda1 vmlinuz then move vmlinuz
to the new machine.

Ignore NeoSadist. He is a flooder and a troll.

cordially, as always,

rm

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+alan hicks+

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In alt.os.linux.slackware, NeoSadist dared to utter,

Did you not read the OP's post or something? He specifically said he
doesn't have nor want gcc installed on the 486 and doesn't have much
disk space left. He may not even have enough for the kernel source for
all we know.

- --
It is better to hear the rebuke of the wise,
Than for a man to hear the song of fools.
Ecclesiastes 7:5
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+alan hicks+

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pgp trash troll delete

Hicks, Alan
188 Shady Dale Dr
Lizella, GA 31052
478-935-8132

chud

Which config did you use to build your 2.4.27 kernel?

The config that builds the stock bare.i kernel will build a kernel that
boots on a 486 machine. Start with that config, do a make oldconfig, then
do the usual make bzImage... etc, and veryify that the kernel boots. THEN
go back and start customizing the config for your specific needs. Do it a
few steps at a time in case you break something.