Avoiding common pitfallsEdit online Common problems and how to avoid them. Ensuring correct channel path statusEnsure that you varied the path offline before you perform a planned task on it.Determining channel path usage on LPARTo determine the usage of a specific channel path on LPAR, for example, to check whether traffic is distributed evenly over all channel paths, use the channel path measurement facility.Ignore unnecessary I/O devicesAn instance of Linux® on IBM® Z should ignore all I/O devices that it does not currently use.Using cio_ignoreWith cio_ignore, essential devices might be hidden. Excessive guest swappingAvoid excessive guest swapping by using the timed page pool size and the static page pool size attributes.Including service levels of the hardware and the hypervisorThe service levels of the different hardware cards, the LPAR level, and the z/VM® service level are valuable information for problem analysis.Booting stops with disabled wait stateAn automatic processor type check might stop the boot process with a disabled wait PSW.Preparing for dump-on-panicYou might want to consider setting up your system to automatically create a memory dump after a kernel panic. Function unavailable or degraded in Linux on z/VMFor some functions, Linux® on z/VM® issues diagnose instructions to the z/VM® hypervisor.Parent topic: Diagnostics and troubleshooting
