When running GPFS on SElinux you cannot allow the normal init scripts to start GPFS because that will cause the GPFS daemons to run in the SElinux domain "initrc_t" which is too restricted for GPFS. To get GPFS to run fully unconfined, use the runcon command to set the security context. Run the following in /etc/rc.d/rc.local:

runcon -t unconfined_t /usr/lpp/mmfs/bin/mmstartup

Then disable automatic startup of GPFS by running:

chkconfig gpfs off

Secondly GPFS doesn't support the SElinux file labels, so you need to set a label on the file system at mount time. Any files in the GPFS file system will then have the same label. For example, to mount a GPFS file system with xen-images, disable normal GPFS automount of the file system by running:

mmchfs gpfsxen -A no

Then "manually" mount the file system with the correct fscontext by adding the following to /var/mmfs/etc/mmfsup.scr:

mount /dev/gpfsxen -t gpfs -o "fscontext=system_u:object_r:xen_image_t",rw,mtime,atime,dev=gpfsxen /var/lib/xen/images