On Friday, 11/05/2010 at 10:50 EDT, Clovis Pereira <[email protected]> wrote: > I think this model was planned for CMS (or equivalent) users, not for the > new "plug and play" systems, like zVM itself and Linux. > Example: when we attach a dasd to Linux or second level zVM, they recognize > the new resource and puts it online, "automagically". So, the signalling > mechanism already exist. > Why don't extent it to changes in USER DIRECT (HCPDIR?), including memory > changes? And left the decision how to process the interrupt to guest OS. > Maybe it is material for another "Request For Change"....
The CIM model was built by the DMTF with engineers from many companies and was NOT tuned for CMS. It was tuned for MS Virtual Server, KVM, VMware, z/VM, LPAR, .... It turned out that System z made significant contributions since it was so far ahead of the others. You can infer needed hypervisor capabilities from just studying the model. (The DMTF is to Systems Management what the IETF is to Networking.) z/VM conforms to the model. Your proposal would break the model and would, as I tried to describe, be a Bad Idea. If you alter the "current" settings for the virtual machine and add a virtual resource (dedicated dasd, minidisk), then those signals would indeed be sent. BTW, the only thing CMS can do in response to those signals is automatically RELEASE a disk that is DETACHed. If z/VM does not virtualize some set of signals, then dynamic changes to the runtime environment for the associated resource would be prohibited. Alan Altmark z/VM and Linux on System z Consultant IBM System Lab Services and Training ibm.com/systems/services/labservices office: 607.429.3323 [email protected] IBM Endicott ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
