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Message-Id: <20220728190051.237437-1-shaoqin.huang@intel.com>
Date: Thu, 28 Jul 2022 13:00:47 -0600
From: shaoqin.huang@...el.com
To: rppt@...nel.org
Cc: Shaoqin Huang <shaoqin.huang@...el.com>,
Karolina Drobnik <karolinadrobnik@...il.com>,
David Hildenbrand <david@...hat.com>,
Rebecca Mckeever <remckee0@...il.com>, linux-mm@...ck.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] memblock test: Add test to memblock_add() 129th region
From: Shaoqin Huang <shaoqin.huang@...el.com>
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 some valid memory, when
memblock_double_array() choose a new memory region from memory.regions,
it will always choose a valid memory region if we add all valid memory
region, so the 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@...el.com>
---
tools/testing/memblock/tests/basic_api.c | 65 ++++++++++++++++++++++++
tools/testing/memblock/tests/common.c | 9 ++--
tools/testing/memblock/tests/common.h | 5 ++
3 files changed, 76 insertions(+), 3 deletions(-)
diff --git a/tools/testing/memblock/tests/basic_api.c b/tools/testing/memblock/tests/basic_api.c
index 66f46f261e66..ded93f97d98e 100644
--- a/tools/testing/memblock/tests/basic_api.c
+++ b/tools/testing/memblock/tests/basic_api.c
@@ -326,6 +326,70 @@ static int memblock_add_twice_check(void)
return 0;
}
+static int memblock_add_many_check(void)
+{
+ int i;
+ void *base[INIT_MEMBLOCK_REGIONS + 1];
+ void *orig_region;
+ struct region r = {
+ .base = SZ_16K,
+ .size = MEM_SIZE,
+ };
+
+ PREFIX_PUSH();
+
+ reset_memblock_regions();
+ memblock_allow_resize();
+
+ for (i = 0; i < INIT_MEMBLOCK_REGIONS; i++) {
+ dummy_physical_memory_init();
+ append_memblock();
+ base[i] = memory_block.base;
+
+ assert(memblock.memory.cnt == i + 1);
+ assert(memblock.memory.total_size == (i + 1) * MEM_SIZE);
+ }
+
+ orig_region = memblock.memory.regions;
+
+ /* This adds the 129 memory_region, and makes it double array. */
+ dummy_physical_memory_init();
+ append_memblock();
+ base[i] = memory_block.base;
+
+ assert(memblock.memory.cnt == INIT_MEMBLOCK_REGIONS + 1);
+ assert(memblock.memory.total_size == (INIT_MEMBLOCK_REGIONS + 1) * MEM_SIZE);
+ assert(memblock.memory.max == INIT_MEMBLOCK_REGIONS * 2);
+
+ /* The base is very small, so it should be insert to the first region. */
+ memblock_add(r.base, r.size);
+ assert(memblock.memory.regions[0].base == r.base);
+ assert(memblock.memory.regions[0].size == r.size);
+
+ assert(memblock.memory.cnt == INIT_MEMBLOCK_REGIONS + 2);
+ assert(memblock.memory.total_size == (INIT_MEMBLOCK_REGIONS + 2) * MEM_SIZE);
+ assert(memblock.memory.max == INIT_MEMBLOCK_REGIONS * 2);
+
+ /* Free these allocated memory. */
+ for (i = 0; i < INIT_MEMBLOCK_REGIONS + 1; i++) {
+ memory_block.base = base[i];
+ dummy_physical_memory_cleanup();
+ }
+
+ /*
+ * The current memory.regions is occupying a range of memory that
+ * allocated from dummy_physical_memory_init(). After free the memory,
+ * we must not use it. So restore the origin memory region to make sure
+ * the tests can run as normal and not affected by the double array.
+ */
+ memblock.memory.regions = orig_region;
+ memblock.memory.cnt = INIT_MEMBLOCK_REGIONS;
+
+ test_pass_pop();
+
+ return 0;
+}
+
static int memblock_add_checks(void)
{
prefix_reset();
@@ -339,6 +403,7 @@ static int memblock_add_checks(void)
memblock_add_overlap_bottom_check();
memblock_add_within_check();
memblock_add_twice_check();
+ memblock_add_many_check();
prefix_pop();
diff --git a/tools/testing/memblock/tests/common.c b/tools/testing/memblock/tests/common.c
index e43b2676af81..4741e860123a 100644
--- a/tools/testing/memblock/tests/common.c
+++ b/tools/testing/memblock/tests/common.c
@@ -5,12 +5,10 @@
#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 ": "
-static struct test_memory memory_block;
+struct test_memory memory_block;
static const char __maybe_unused *prefixes[PREFIXES_MAX];
static int __maybe_unused nr_prefixes;
@@ -64,6 +62,11 @@ void setup_memblock(void)
memblock_add((phys_addr_t)memory_block.base, MEM_SIZE);
}
+void append_memblock(void)
+{
+ memblock_add((phys_addr_t)memory_block.base, MEM_SIZE);
+}
+
void dummy_physical_memory_init(void)
{
memory_block.base = malloc(MEM_SIZE);
diff --git a/tools/testing/memblock/tests/common.h b/tools/testing/memblock/tests/common.h
index 3e7f23d341d7..8946a3b77f24 100644
--- a/tools/testing/memblock/tests/common.h
+++ b/tools/testing/memblock/tests/common.h
@@ -11,6 +11,8 @@
#include <../selftests/kselftest.h>
#define MEM_SIZE SZ_16K
+#define INIT_MEMBLOCK_REGIONS 128
+#define INIT_MEMBLOCK_RESERVED_REGIONS INIT_MEMBLOCK_REGIONS
/**
* ASSERT_EQ():
@@ -65,9 +67,12 @@ struct region {
phys_addr_t size;
};
+extern struct test_memory memory_block;
+
void reset_memblock_regions(void);
void reset_memblock_attributes(void);
void setup_memblock(void);
+void append_memblock(void);
void dummy_physical_memory_init(void);
void dummy_physical_memory_cleanup(void);
void parse_args(int argc, char **argv);
--
2.30.2
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