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SubjectRe: Intel And Kenrel Programming
Alan Cox <> writes:
> For example the O(1) scheduler will trigger very occasional random
> crashes or reboots with early PII Xeon microcode sets. I'm sure
> Debian has a package for this somewhere.

Something like this, I guess:

$ apt-cache show microcode.ctl
Package: microcode.ctl
Description: Intel IA32 CPU Microcode Utility
The microcode_ctl utility is a companion to the IA32 microcode driver
written by Tigran Aivazian <>. The utility has two
a) it decodes and sends new microcode to the kernel driver to be
uploaded to Intel IA32 family processors. (Pentium Pro, PII,
Celeron, PIII, Xeon, Pentium 4 etc.)
b) it signals the kernel driver to release any buffers it may hold
The microcode update is volatile and needs to be uploaded on each
system boot i.e. it doesn't re-flash your CPU permanently, reboot and
it reverts back to the old microcode. The ideal place to load
microcode is in BIOS, but most vendors never update it!
To enable microcode update, I need some kernel support, thus I need
the linux kernel 2.2.18 or later, or 2.4.0 or later.

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