On Tuesday, 07/12/2011 at 10:56 EDT, James Poirier <james.poir...@doit.nh.gov> wrote:
> This past weekend after an IPL of our z10 to apply RSU 5409 and a VTAM ptf > I discovered that the reported CPUID in zVM had changed: > > CPUID prior to this weedend was : FF01C82620988000 > CPUID after IPL was : FF00C82620988000 > > The difference in the above id?s is 1C8262 to 0C8262. > > Also, made a change to MODE from s/390 to ZVM. > No IOCDS changes were made. > > After I discovered the changed CPUID I backed everything out and there was no > change in the CPUID. I did finally put everything back and just dealt with > the new CPUID. > > Also found out that MCL?s had been applied to the HMC but not to the SE?s. > > Has anybody seen this behavior? Looks like you changed LPARs. When the "Format" bit (48) is 1 (as yours is), word 0 of the virtual CPU ID is of the form FFppnnnn, where pp is the UPID (user partition id #), and n is a digit derived from the CPU id. See the STORE CPU ID instruction in the z/Architecture book. Alan Altmark Senior Managing z/VM and Linux Consultant IBM System Lab Services and Training ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott
