== How to build lustre with 2.6.18/3tera applogic
== by: GDR! <gdr@go2.pl>

1) this is mostly right: http://mergingbusinessandit.blogspot.com/2008/10/building-lustre-1651-against-latest.html [1]

2) make symlinks in kernel from 3tera

3) quilt push - wo. options, until fails

4) fix .c file that fails, quilt push again

5) build kernel (with infiniband support, which in turn requires pci support!)

6) goto lustre dir

7) ./configure --with-linux ...

8) make

9) patches fail - apply all patches in series by hand (manually quilt push)

10) copy linux-stage directory somewhere, just in case

11) vim ldiskfs/ldiskfs/autoMakefile, remove 'quilt push' and 'cp' and all in surrounding that can destroy your patched data

12) make should succeed n ow

13) To build rpm: make rpms will fail, use rpmbuild -bb lustre.spec

14) Create tar file that is missing for rpmbuild from source directory. Don't make clean, ever.

15) rpmbuild -bb lustre.spec again

16) works! :)

Copy of http://mergingbusinessandit.blogspot.com/2008/10/building-lustre-1651-against-latest.html follows:

I was at a customer site this week and had the need to build Lustre 1.6.5.1 against the latest kernel from Redhat, 2.6.18-92.1.13. Being this process has multiple steps, I thought I would document it so that others do not have to reinvent the wheel.

1) Prep a build environment
- cd ~
- yum install rpm-build redhat-rpm-config unifdef
- mkdir -p rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS}
- echo '%_topdir %(echo $HOME)/rpmbuild' > .rpmmacros
- rpm -i http://mirror.centos.org/centos/5/updates/SRPMS/kernel-2.6.18-92.1.13.el5.src.rpm
- cd ~/rpmbuild/SPECS
- rpmbuild -bp --target=`uname -m` kernel-2.6.spec 2> prep-err.log | tee prep-out.log

2) Download and install quilt (quilt is used for applying kernel patches from a series file)
- cd ~
- wget http://download.savannah.gnu.org/releases/quilt/quilt-0.47.tar.gz
- gunzip quilt-0.47.tar.gz
- tar -xvf quilt-0.47.tar
- cd quilt-0.47
- ./configure
- make
- make install

3) Prepare the Lustre source code
- Download from http://www.sun.com/software/products/lustre/get.jsp
- mv lustre-1.6.5.1.tar.gz /usr/src
- gunzip lustre-1.6.5.1.tar.gz
- tar -xvf lustre-1.6.5.1.tar

4) Apply the Lustre kernel-space patches to the kernel source tree
- cd /root/rpmbuild/BUILD/kernel-2.6.18/linux-2.6.18.x86_64/
- ln -s /usr/src/lustre-1.6.5.1/lustre/kernel_patches/series/2.6-rhel5.series series (there are several diffrent series files in the series dir, choose the one closest to your environment)
- ln -s /usr/src/lustre-1.6.5.1/lustre/kernel_patches/patches patches
- quilt push -av

5) Compile a new kernel from source
- make distclean
- make oldconfig dep bzImage modules
- cp /boot/config-`uname -r` .config
- make oldconfig || make menuconfig
- make include/asm
- make include/linux/version.h
- make SUBDIRS=scripts
- make rpm
- rpm -ivh ~/rpmbuild/RPMS/kernel-2.6.18prep-1.x86_64.rpm
- mkinitrd /boot/initrd-2.6.18-prep.img 2.6.18-prep
- Update /etc/grub.conf with new kernel boot information

6) Reboot system with new, patched kernel

7) Compile Lustre with the new kernel running
- cd /usr/src/lustre-1.6.5.1
- ./configure --with-linux=/root/rpmbuild/BUILD/kernel-2.6.18/linux-2.6.18.x86_64
- make rpms (Build RPMs will be in ~/rpmbuild/RPMS)

8) Install the appropriate RPMs for your environment