I just received a note from our h/w folks asking if VM is susceptible to this problem:
CMOS MCL FIX G40963.045 Release Date: 2007/10/17 Alert: HIPER MCL installation: NONDISRUPTIVE MCL contents: This fix addresses an issue that can result in a system checkstop (SRC 24310002 9801Cxxx). The issue involves use of the "conditional-SSKE facility" (conditional-Set Storage Key Extended facility). The issue can occur during a very narrow timing window when SSKE operations are simultaneously executing on multiple processors. Exposure to the issue exists when the conditional-SSKE facility is supported by the machine and the operating system exploits the conditional-SSKE facility. Driver-67L provides machine support for the conditional-SSKE facility. The RSM (Real Storage Manager) component of z/OS 1.7 (with PTF UA24272), 1.8 and 1.9 exploit the conditional-SSKE facility. As such, z9 systems at Driver-67L and running z/OS 1.7 (with PTF UA24272), 1.8 or 1.9 are exposed to this issue. The conditional-SSKE facility is described in "z/Architecture Principles of Operation" (SA22-7832-05). Just having returned to work following a bout with the flu, I thought I would take the path of expedience and ask the list. My inbox is full of unread mail, so I have plenty to do today without having to dig too deeply into HIPER MCLs. Regards, Richard Schuh
