Why do I need isdn4k-utils

James Wilkinson james at westexe.demon.co.uk
Fri Jan 14 13:39:11 UTC 2005

Dave wrote:
>  Another example--I have a CLEARLY single-processor system. So why is 
> irqbalance activated in runlevels 3-5? I can grudgingly accept why it was 
> installed--it's easier to have a single kernel-utils package than have a 
> single processor and multi-processor versions. And apparently it exits 
> quietly when it discovers it's not needed. But why is it turned on in the 
> first place?

I'm not sure that it's as clear as all that.

Apart from laptops, most computers sold today could, in theory, be
upgraded to need an SMP kernel. Anything P4-based could be upgraded to a
Hyper-Threading CPU. Both AMD and Intel have multiple-core processors
coming: the AMD ones, apparently, might not even need a BIOS update to
work in some current motherboards.

And, of course, you can always transfer the hard drive to something that
does do SMP.

Many servers are supplied with a dual CPU motherboard, but a single
processor. Then (the rationale goes) the purchaser can upgrade later.
This market is likely to buy Red Hat Enterprise Linux, or variants

Given that irqbalance is installed anyway, and exits fast when it
discovers that it isn't needed, it's probably better just to keep it

You would, of course, need to install an SMP kernel. And you could say
that I'm arguing for having one of those installed by default.

I can see some merit to that argument, at least in RHEL. But it's the
sort of install that people remember to do (if you add a CPU, and find
the OS doesn't detect it, you tend to ask why). Activating irqbalance
isn't like that.

But then I'm probably biased. This computer is a dual-Celeron 433


E-mail address: james | I learnt the rules of rugby. There is only one rule.
@westexe.demon.co.uk  | "Skip it by any means necessary".

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