linux-kernel - Re: CONFIG_IRQBALANCE for 64-bit x86 ?

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Message-ID: <20071121003629.GA20765@elte.hu>
Date:	Wed, 21 Nov 2007 01:36:29 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Mark Lord <lkml@....ca>, Arjan van de Ven <arjan@...radead.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...l.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: CONFIG_IRQBALANCE for 64-bit x86 ?


* H. Peter Anvin <hpa@...or.com> wrote:

> Ingo Molnar wrote:
>> * H. Peter Anvin <hpa@...or.com> wrote:
>>
>>>>> Nope.  It runs inside an initramfs, of course; that initramfs is linked 
>>>>> into the kernel binary.
>>>> would be nice to have a single-image variant for all of this. having the 
>>>> separate initrd was always trouble - and it's pointless as well. (we 
>>>> rarely update the initrd without updating the vmlinuz as well)
>>> We do.  Am I missing something?
>>
>> do we have a single-image way of getting both the kernel image and the 
>> initram set up at once? What i know of is a two-image approach: vmlinuz 
>> and initrd.
>>
>
> Yes, we do.  The initramfs can be linked into the kernel image.  The 
> unified klibc build tree does that by default.

argh. Guess i misread your answer:

>>>>>> nor do i - i was under the impression that klibc was able to work 
>>>>>> out of a bzImage too? Am i wrong?
>>>>> Nope.  It runs inside an initramfs, of course; that initramfs is linked 
>>>>> into the kernel binary.

i took that "Nope" as referring to my impression - but you in fact meant 
that i am not wrong? :-) So nothing to see here. single-bzImage initrd 
was and is possible, so we could in fact move chunks of system-related 
userland (such as irqbalanced) into the kernel proper?

	Ingo
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