memblock tests: add simulation of physical memory with multiple NUMA nodes

Add function setup_numa_memblock() for setting up a memory layout with
multiple NUMA nodes in a previously allocated dummy physical memory.
This function can be used in place of setup_memblock() in tests that need
to simulate a NUMA system.

setup_numa_memblock():
- allows for setting up a memory layout by specifying the fraction of
  MEM_SIZE in each node

Set CONFIG_NODES_SHIFT to 4 when building with NUMA=1 to allow for up to
16 NUMA nodes.

Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Rebecca Mckeever <remckee0@gmail.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/4566d816a85f009268d4858d1ef06c7571a960f9.1663046060.git.remckee0@gmail.com

This commit is contained in:

Rebecca Mckeever

2022-09-13 00:21:09 -05:00

committed by

Mike Rapoport

parent 42c3ba8658

commit b338bde5a3

3 changed files with 35 additions and 2 deletions

									
										tools/testing/memblock/scripts/Makefile.include
									
		+1
		-1
	
												View File
												
				@@ -3,7 +3,7 @@

				# Simulate CONFIG_NUMA=y

				ifeq ($(NUMA), 1)

					CFLAGS += -D CONFIG_NUMA

					CFLAGS += -D CONFIG_NUMA -D CONFIG_NODES_SHIFT=4

				endif

				# Use 32 bit physical addresses.