Patent ID: 6910160
Filing Date: 2005-06-21
Classification: G06F

Abstract:
1. A method in a logically partitioned data processing system for preserving trace data after a partition crash, said logically partitioned data processing system including a plurality of processors and a plurality of partitions, each one of said plurality of partitions executing its own separate operating system, errors from an operating system being executed by one of said plurality of partitions not affecting the operation of operating systems being executed by all others of said plurality of partitions, said method comprising the steps of: encountering an unrecoverable error in one of said plurality of processors that is assigned to one of said plurality of partitions that results in a crash of said one of said plurality of partitions remaining ones of said plurality of partitions continuing to function after said crash each one of said plurality of processors being assigned to a different one of said plurality of partitions; storing trace data for all of said partitions in said trace buffer: continually overwriting data that is already stored in said trace buffer with newly received trace data as said newly received trace data is received within said trace buffer; storing, in said trace buffer, error data associated with said error; and saving the current contents of said trace buffer prior to said error data being overwritten.