Re: Custom kernel building
On Sun, 2011-04-17 at 22:20 +0000, Guilherme Patriota wrote:
What's the difference between building custom kernel with Fedora
and
building a kernel with the sources from kernel.org?Building with rpmbuild
takes way longer to build than the normal source code from kernel.org which
is wierd.
For one thing, the Fedora kernel specfile is written to built a number
of packages, some of which might be very expensive to built (my guess
would be that the debuginfo package takes a lot of time).
I've set it to build with rpmbuild for about 3h ago and it's
still
building taking about 90% ~ 100% of both cores.
A few months ago I posted a message
(http://lists.fedoraproject.org/pipermail/kernel/2011-February/003032.html) in which I
documented the command I use to keep the Fedora kernel's rpm build time at an (for me)
acceptable level:
Just to help me remember (or rediscover) this:
rpmbuild -bb --target=i686 --with baseonly --without perf
--without debuginfo $SPECS/kernel.spec
comes close. (It also generates the kernel-devel and kernel-headers
packages, but that doesn't seem to cost much time).
A command like that one takes (roughly) one hour at a dual core, x86-64
laptop and two hours on a single core, i686 laptop. I don't build custom
kernels that often, so I haven't bothered looking for further speed
gains.
Paul Bolle