mcelog: memory error handling in user space

Servers and high-performance computing systems contain more and more memory to handle bigger data sets. But with more and larger memory modules, and more transistors in them, combined with larger clusters of systems, the rate of memory errors in operation is also increasing. Modern server systems generally use ECC memory and other ways to detect and correct many memory errors in the hardware. When the hardware corrects an error it generates corrected error events. These events can be also used by specialized software to prevent future failures. mcelog is a daemon for handling and reporting hardware errors. It is able to use trends in corrected error reports to implement specific error prevention algorithms.