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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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7
tools/testing/memblock/tests/common.c
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@@ -5,8 +5,6 @@
#include <linux/memory_hotplug.h>
#include <linux/build_bug.h>
#define INIT_MEMBLOCK_REGIONS 128
#define INIT_MEMBLOCK_RESERVED_REGIONS INIT_MEMBLOCK_REGIONS
#define PREFIXES_MAX 15
#define DELIM ": "
#define BASIS 10000
@@ -115,6 +113,11 @@ void dummy_physical_memory_cleanup(void)
free(memory_block.base);
}
phys_addr_t dummy_physical_memory_base(void)
{
return (phys_addr_t)memory_block.base;
}
static void usage(const char *prog)
{
BUILD_BUG_ON(ARRAY_SIZE(help_opts) != ARRAY_SIZE(long_opts) - 1);