Installation guide

hardware configuration changes and whether or not a kernel rebuild is
required:
Change Requirements
Processors – adding,
removing, or reassigning
CPU modules.
Changing the lp_cpu_mask# EV for any partition
does not require a kernel rebuild. Remember that
both processors on a dual CPU module must be
assigned to the same partition.
IO Processors – adding,
removing, or reassigning
IOP modules.
A kernel rebuild is required if a IOP module is
added to or removed from a partition (rebuild the
kernel for that partition). Moving a IOP module
across partitions requires a kernel rebuild on both
partitions. The lp_io_mask# EV assigns IOP
modules.
Adding or removing IO busses and IO controllers will
require a kernel rebuild for the affected partition.
Memory Modules –
changing the memory
module configuration.
For the primary partition (partition 0), changes to
the memory module configuration do not require a
kernel rebuild.
The kernel for any secondary partition must be built
to run at a specific memory address (that is, the
physical memory starting address for the partition).
Certain types of memory reconfiguration will change
this address and require a kernel rebuild. A
partition’s memory starting address will change if
the memory size for any lower numbered partition
increases or decreases.
For example, if a 2GB memory module in partition
zero is replaced by a 4GB memory, then the memory
starting address of partition one would increase by
2GB. In this example a kernel rebuild would be
required.
If a secondary partition’s kernel fails to boot after a
memory module configuration change, you should
rebuild the kernel.
The memory starting address for each partition is
displayed at the primary console after each iteration
of the P00>>>lpinit command.
E.4.8.1 How to Rebuild the UNIX Kernel for a Partition
The following steps describe how you rebuild the kernel, which is a special
case of the typical kernel build instructions documented in Chapter 5. This
procedure assumes that partitions are initialized as described in
Section E.4.4 and the partition requiring a kernel rebuild is at the
P##>>>
console prompt. Refer to Chapter 5 for information on:
Administering Specific Hardware E–29