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

[Kyle McMartin]

On Thu, Jan 08, 2009 at 04:31:58PM -0500, Theodore Tso wrote:
> On Thu, Jan 08, 2009 at 02:17:03PM -0500, Dave Jones wrote:
> > 
> > Fedora rawhide users noticed this same problem this morning too,
> > when I pushed out a build that eats up a gig of diskspace thanks
> > to the number of modules we have, that are all afflicted by this problem.
> > 
> > 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:

kyle at localhost ~/misc $ for i in *.rpm; do echo $i; rpm
	-qip $i | grep Size; done
kernel-2.6.29-0.25.rc0.git14.fc11.ppc64.rpm
Size        : 124858478                        License:
kernel-2.6.29-0.25.rc0.git14.fc11.ppc.rpm
Size        : 66313693                         License:
kernel-2.6.29-0.25.rc0.git14.fc11.x86_64.rpm
Size        : 1041480317                       License:
kernel-PAE-2.6.29-0.25.rc0.git14.fc11.i686.rpm
Size        : 56252360                         License:

x86_64 is an order of magnitude bigger than the rest, which have
identical debug options enabled.

regards, Kyle