The GPFS open source portability layer
On Linux® platforms, GPFS uses a loadable kernel module that enables the GPFS daemon to interact with the Linux kernel. The source code is provided for the portability layer so that the GPFS portability can be built and installed on a wide variety of Linux kernel versions and configuration.
When installing GPFS on Linux, you build a portability module based on your particular hardware platform and Linux distribution to enable communication between the Linux kernel and GPFS. For more information, see Building the GPFS portability layer on Linux nodes.