[K12OSN] SL 6 no cmov support in kernel

Jim Kinney jim.kinney at gmail.com
Thu Feb 23 13:28:32 UTC 2012

With old (really old!) hardware, it's not about adding a module, it's about
having a kernel that doesn't require modern hardware. Basically, there are
certain hardware features that are not in your cpu (cmov commands) so you
need a kernel that is older and will not be looking for it. I have not seen
a kernel module that can emulate missing cpu capabilities.

So you will need an _old_ real i386 kernel and that will require all the
supporting libs to be compatible. Thus you'll need two chroots and a
mechanism to point clients appropriately. As you know the MAC addresses,
you can group them in dhcpd.conf and point them to the correct chroots that

On Thu, Feb 23, 2012 at 7:57 AM, Barry Cisna <cisna-barry at wc235.k12.il.us>wrote:

> Jeff,
> Yep,You are right. After I posted this I realized I had the fact
> reversed.
> These little Ebox's are the cat's meow,and I'd like to make these usable
> on SL 6.1. This is what i use personally. I have had the same Ebox for
> 11 years! I would think someone much smarter than I can compile a kmod
> module to hang onto the existing running kernel to make the old school
> processors seem 'acceptable' to the kernel after the kmod is loaded?
> I may delve into running two client chroots( for the older
> machines),,although I'd like to stay away from this as I am sure it will
> involve behind the scene's snafoos.
> Thanks,
> Barry
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James P. Kinney III

As long as the general population is passive, apathetic, diverted to
consumerism or hatred of the vulnerable, then the powerful can do as they
please, and those who survive will be left to contemplate the outcome.
- *2011 Noam Chomsky

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