Re: [gentoo-user] Re: A pared down kernel config

[Jan-Hendrik Zab]

On Sun, 6 Jan 2008 10:58:12 +0400
Yahya Mohammad <mfyahya@×××××.com> wrote:

> > > Just to know more on this... Is there really any reason to worry
> > > about kernel size... I mean in most cases with a standard desktop
> > > install?
> > >
> >
> > yes. Bigger kernel = more cpu cache used up = slower system.
>
> Does all of the kernel reside in cpu cache all the time? Or can parts
> of it get moved to system RAM? What about modules that are loaded from
> disk?

No, it does not. The CPU caches are used differently. Partly, they
become something like read-ahead caches due to the fact that the CPU
can only read hole cache lines.

See http://lwn.net/Articles/252125/ for a good and recent documentation.

	Jan-Hendrik Zab

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Jan-Hendrik Zab <jan.h.zab@×××××.com>
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