On 11/28/2012 09:46 AM, Bryn M. Reeves issued this missive:
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On 11/28/2012 05:07 PM, JD wrote:
The main point is that the build takes too darned long. On my
unicore cpu, it takes almost 2 days. Building bazillions of useless
modules is a great waste of time and machine.
If you want to change the set of modules enabled you'll have to do a
bit more as the kernel .config options aren't exposed in the spec file
in a way that you can control via rpmbuild options.
That said, you should check out Richard's suggestion as you may find
that it's the many variant (up/smp/pae/debug/debuginfo etc.)
sub-packages that are chewing up the time for you. If turning those
off gives you an acceptable build time it's less invasive than munging
the KConfig options to drop unneeded modules.
If you decide you do need to do that though you'll need to install the
SRPM (either with bare RPM build directory or via mock) so that you
can get access to the individual sources and patches that make it up.
If you're using the normal RPM directory layout then the files you're
interested in will end up in $rpmbuild/SOURCES (where $rpmbuild is
whatever RPM's %_topdir macro is set to).
For the kernel the interesting files are config-*-generic,
config-*-smp etc., Makefile.config and a perl script named merge.pl:
$ cd rpmbuild/SOURCES
$ ls config-* merge.pl Makefile.config
config-arm-generic config-powerpc32-generic
config-arm-highbank config-powerpc32-smp
config-arm-imx config-powerpc64
config-arm-kirkwood config-powerpc-generic
config-arm-omap-generic config-rhel-generic
config-arm-tegra config-s390x
config-debug config-sparc64-generic
config-generic config-x86-32-generic
config-i686-PAE config-x86_64-generic
config-local config-x86-generic
config-nodebug merge.pl
Makefile.config
The structure of the config files is fairly self-explanatory;
config-generic is the global catch-all and architectures and variants
(e.g. PAE, smp) can override specific values as needed.
If you just want to make a few local changes you can drop them into
config-local - this should have the highest precedence and is is
automatically merged by kernel.spec during %prep.
I reiterate:
1. Install the kernel source RPM.
2. Navigate to your ~/rpmbuild/SPECS directory.
3. Do "rpmbuild -bp --target=x86_64 kernel.spec" or
"rpmbuild -bp --target=i686 kernel.spec" depending on your
processor.
4. Once that's complete, navigate to your
~rpmbuild/BUILD/kernel-3.6.fc17/linux-3.6.7-4.fc17.x86_64
directory. Read the "README" file. I say again, read the
README file!
5. Run "make nconfig" or "make xconfig" or whatever
"make *config" floats your boat and bugger the configuration
as you see fit.
6. Run "make" to build the kernel as you've specified. Follow
the directions in the README file's "COMPILING the kernel"
section.
That README file is chock full of what you need to do. This is the way
customized kernels are built. Always has been, probably always will be.
----------------------------------------------------------------------
- Rick Stevens, Systems Engineer, AllDigital ricks@xxxxxxxxxxxxxx -
- AIM/Skype: therps2 ICQ: 22643734 Yahoo: origrps2 -
- -
- I was married by a judge. I should have asked for a jury. -
- -- Groucho Marx -
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