Date: Wed, 21 Nov 2007 01:36:29 +0100
From: Ingo Molnar <mingo@elte.hu>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Mark Lord <lkml@rtr.ca>, Arjan van de Ven <arjan@infradead.org>,
       Nick Piggin <nickpiggin@yahoo.com.au>,
       Andrew Morton <akpm@linux-foundation.org>,
       Linus Torvalds <torvalds@osdl.org>,
       Linux Kernel <linux-kernel@vger.kernel.org>,
       Thomas Gleixner <tglx@linutronix.de>
Subject: Re: CONFIG_IRQBALANCE for 64-bit x86 ?
Message-ID: <20071121003629.GA20765@elte.hu>
References: <200711201837.39664.nickpiggin@yahoo.com.au> <20071120064747.2a8036cd@laptopd505.fenrus.org> <20071120220110.GF24156@elte.hu> <47436C43.6010200@rtr.ca> <20071120232723.GB23667@elte.hu> <47436ECD.3050004@zytor.com> <20071120234725.GH23667@elte.hu> <474372BC.2000609@zytor.com> <20071121000742.GN23667@elte.hu> <474379C1.2040703@zytor.com>
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* H. Peter Anvin <hpa@zytor.com> wrote:

> Ingo Molnar wrote:
>> * H. Peter Anvin <hpa@zytor.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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