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memblock test: Add test to memblock_add() 129th region

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Add 129th region into the memblock, and this will trigger the
memblock_double_array() function, this needs valid memory regions. So
using dummy_physical_memory_init() to allocate a large enough memory
region, and split it into a large enough memory which can be choosed by
memblock_double_array(), and the left memory will be split into small
memory region, and add them into the memblock. It make sure the
memblock_double_array() will always choose the valid memory region that
is allocated by the dummy_physical_memory_init().
So memblock_double_array() must success.

Another thing should be done is to restore the memory.regions after
memblock_double_array(), due to now the memory.regions is pointing to a
memory region allocated by dummy_physical_memory_init(). And it will
affect the subsequent tests if we don't restore the memory region. So
simply record the origin region, and restore it after the test.

Signed-off-by: Shaoqin Huang <shaoqin.huang@intel.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/20221011062128.49359-2-shaoqin.huang@intel.com
This commit is contained in:
Shaoqin Huang
2022-10-11 14:21:20 +08:00
committed by Mike Rapoport
parent 30a0b95b13
commit 085bdaa6eb
3 changed files with 103 additions and 3 deletions
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6
tools/testing/memblock/tests/common.h
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@@ -10,9 +10,12 @@
#include <linux/printk.h>
#include <../selftests/kselftest.h>
#define MEM_SIZE SZ_16K
#define MEM_SIZE SZ_32K
#define NUMA_NODES 8
#define INIT_MEMBLOCK_REGIONS 128
#define INIT_MEMBLOCK_RESERVED_REGIONS INIT_MEMBLOCK_REGIONS
enum test_flags {
/* No special request. */
TEST_F_NONE = 0x0,
@@ -124,6 +127,7 @@ void setup_memblock(void);
void setup_numa_memblock(const unsigned int node_fracs[]);
void dummy_physical_memory_init(void);
void dummy_physical_memory_cleanup(void);
phys_addr_t dummy_physical_memory_base(void);
void parse_args(int argc, char **argv);
void test_fail(void);