linux-kernel - Re: [REGRESSION] Recent change to kernel spikes out ccache/distcc

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Message-ID: <20090111221132.GE29383@mit.edu>
Date:	Sun, 11 Jan 2009 17:11:32 -0500
From:	Theodore Tso <tytso@....edu>
To:	Kyle McMartin <kyle@...radead.org>
Cc:	Dave Jones <davej@...hat.com>, Jan Beulich <jbeulich@...ell.com>,
	Sam Ravnborg <sam@...nborg.org>, linux-kernel@...r.kernel.org,
	ccache@...ts.samba.org
Subject: Re: [REGRESSION] Recent change to kernel spikes out ccache/distcc

On Sun, Jan 11, 2009 at 04:48:37PM -0500, Kyle McMartin wrote:
> > > I'll have to revert  ad7a953c for our builds to continue tracking mainline
> > > without monopolising the diskspace in the Fedora build system.
> > 
> > Note: you'll probably also have revert 9bb48247 (allow stripping of
> > generated symbols under CONFIG_KALLSYMS_ALL) since I believe it
> > depends on ad7a953c.
> 
> This doesn't appear to be the culprit. Or at least, doesn't fix the
> problem.
> 
> 	make INSTALL_MOD_PATH=mods/ modules_install
> 
> with a distro kernel config (ie: Fedora's[1]) still results in
> 1.8GB of modules (willy checked that it wasn't a Fedora toolchain
> bug by reproducing on a Debian system.)
> 
> As near as I can ascertain, this is limited to x86_64, at least on
> Fedora:

It shows up for me with x86_32, and it is fixed by reverting those two
commits.  Pre-2.6.28-rc6:

 74864 -rw-r--r-- 1 tytso tytso  76657780 2008-12-12 14:41 linux-image-2.6.28-rc8-00066-gc810663_tytso.SMP.1_i386.deb

Post 2.6.28:

146380 -rw-r--r-- 1 tytso tytso 149888992 2009-01-06 02:01 linux-image-2.6.28-05784-gd5b9778_tytso.SMP.1_i386.deb

After I revert the above two commits:

 76340 -rw-r--r-- 1 tytso tytso  78167848 2009-01-09 08:45 linux-image-2.6.28-07956-g2e69ab5_tytso.SMP.1_i386.deb

       		    	  	 	  	     	   - Ted
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