linux-kernel - Re: "build-id" changes break sparc64

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Message-ID: <20070723180048.GA8268@uranus.ravnborg.org>
Date:	Mon, 23 Jul 2007 20:00:48 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Al Viro <viro@....linux.org.uk>
Cc:	Alan Modra <amodra@...pond.net.au>,
	Roland McGrath <roland@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	David Miller <davem@...emloft.net>,
	Adrian Bunk <bunk@...sta.de>, linux-kernel@...r.kernel.org
Subject: Re: "build-id" changes break sparc64

On Mon, Jul 23, 2007 at 12:49:36PM +0100, Al Viro wrote:
> On Mon, Jul 23, 2007 at 06:55:59PM +0930, Alan Modra wrote:
> > On Mon, Jul 23, 2007 at 10:14:35AM +0200, Sam Ravnborg wrote:
> > > But I would still like to hear from Alan what the benefits are.
> > 
> > See http://sourceware.org/ml/binutils/2004-10/msg00178.html
> 
> What does _not_ doing intermediates do to memory footprint of ld(1)
> and time spent in there?

x86_64 defconfig

rm vmlinux*; time make vmlinux

Vanilla tree: ~7,7 sec
With single shot ld (Roland's patch): 8,3 secs

So as expected slower. As we link twice the cost is ~0,3 sec 
for a x86_64 defconfig link on my box.

So it should be beneficial to do it and Alan's link did not really
convince me for the kernel usage.
Al - do you have any input there?

	Sam
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