JFS

JFS is IBM's Journaled File System

• Cross Compile -

Change BUILDXX to your architecture (32,64)

CC="${CC} ${BUILDXX}" ./configure --prefix=/tools --host=${LFS_TARGET} &&
make &&
make install

• Final System Compile -

./configure --prefix=/usr --sbindir=/sbin &&
make &&
make install &&
ln -sf /sbin/jfs_fsck /sbin/fsck.jfs &&
ln -sf /sbin/jfs_mkfs /sbin/mkfs.jfs

• Grub Changes -

Change the following line
cp -v /usr/lib/grub/{architecture}-pc/stage{1,2} /boot/grub
to
cp -v /usr/lib/grub/{architecture}-pc/* /boot/grub

• Kernel Configuration -

Make sure you select JFS. If it's going to be your root file system, make sure you build it into the kernel. Also select JFS Statistics, so jfs_fsck can give you valuable feedback when issues arise.

• /etc/fstab -

jfs is labeled the label used for the jfs file system.
Example:
/dev/hda2 / jfs defaults 1 1