linux-kernel - Re: CONFIG_REORDER Kconfig help strange sentence.

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Message-ID: <20070312235605.GA14444@muc.de>
Date:	Tue, 13 Mar 2007 00:56:05 +0100
From:	Andi Kleen <ak@....de>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	lkml - Kernel Mailing List <linux-kernel@...r.kernel.org>,
	arjan@...radead.org
Subject: Re: CONFIG_REORDER Kconfig help strange sentence.

On Tue, Mar 13, 2007 at 10:18:03AM +1100, Rusty Russell wrote:
> OK, this confused me:
> 
>         Function reordering (REORDER) [N/y/?] (NEW) ?
>         
>         This option enables the toolchain to reorder functions for a more 
>         optimal TLB usage. If you have pretty much any version of binutils, 
>         this can increase your kernel build time by roughly one minute.
>         
> "If you have pretty much any version of binutils"?  Huh?
> 
> You mean "This will slow your kernel build by about a minute"?

Yes. Lots of sections seem to trigger some quadratic behaviour in ld.

It might be fixed in some unreleased CVS version though (not 100% sure) 

-Andi
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