Maybe s390x should just provide a dedicate interface to add these memory
blocks instead of adding them during boot and then relying on the old way of
using online/offline set them online/offline.
The current 'lsmem -a' command displays both online and standby memory.
If a new interface is introduced and standby memory is no longer listed,
the following consequences might occur:
1. Running 'lsmem -a' would only show online memory, potentially leading
to user complaints.
That's why the new, clean way of doing it will require a world switch.
If the admin wants the benefits of altmap/memmap allocation, it can be
BTW, thinking about it, I guess one could teach lsmem (and maybe chmem)
to consult additional interfaces on s390x to show standby memory that's
not added to the system yet.
David / dhildenb