International Business Machines Corporation

Maha Emad

Douglas J Griffith

Andrew Dunshea

A method, system and computer-usable medium are disclosed for persisting Lightweight Memory Trace (LMT) data across reboots of a system. One or more LMT traces are stored in a predetermined pinned memory area with a server's operating system (OS) through a system reboot. A pointer to each LMT is likewise stored in nonvolatile storage (NVS) at a known memory location. The pointers in NVS point to a page which describes where the LMT trace and other kernel structures are in real memory. During initialization, the OS guards these preserved pages to prevent them from being used. By keeping the current and prior address within NVS, the current LMT and prior traces can be retrieved and processed to determine the cause of the system reboot.

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Austin, TX, United States of America

Maha Emad