■To control whether a system board contains kernel memory, use one or more of the following features, which are described below: kernel cage, floating boards, and kernel memory assginment.
■To copy kernel memory from one board to another, use the
(1.1) Kernel Cage
The kernel cage function must be in use for DR operations on memory to succeed. Without the kernel cage, kernel memory could be assigned to all system boards, making it impossible to perform DR operations on memory. With the kernel cage, kernel memory is limited to a minimum set of system boards.
For details on enabling this function, see Section 2.3.2, “Settings of Kernel Cage Memory” on page
(1.2) Floating Boards
A floating board is a system board that is designated to be moved easily to another domain. In general, kernel memory is not assigned to a floating board unless absolutely necessary.
However, kernel memory can be assigned to a floating board when one of the following is true:
■The total amount of space available among
■The deleteboard(8) command is used with its -f (force) option.
For details on enabling the floating board option for a system board, see
Section 2.2.2.2, “Floating Board Option” on page
(1.3) Kernel Memory Assignment
When a domain is powered on, the Power On Self Test (POST) initially assigns an address space to each system board in that domain. The order in which address spaces are assigned depends on the LSB number and floating board option of each system board. The first address spaces are assigned to