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Message-Id: <a1776e195f8e1a08cc828be3bb9760b1d59e8ddd.1664138929.git.remckee0@gmail.com>
Date: Sun, 25 Sep 2022 16:26:55 -0500
From: Rebecca Mckeever <remckee0@...il.com>
To: Mike Rapoport <rppt@...nel.org>, linux-mm@...ck.org,
linux-kernel@...r.kernel.org
Cc: David Hildenbrand <david@...hat.com>,
Rebecca Mckeever <remckee0@...il.com>
Subject: [PATCH 4/5] memblock tests: add generic NUMA tests for memblock_alloc_exact_nid_raw
Add tests for memblock_alloc_exact_nid_raw() where the simulated physical
memory is set up with multiple NUMA nodes. Additionally, all but one of
these tests set nid != NUMA_NO_NODE. All tests are run for both top-down
and bottom-up allocation directions.
The tested scenarios are:
Range unrestricted:
- region cannot be allocated:
+ there are no previously reserved regions, but requested node is
too small
+ the requested node is fully reserved
+ the requested node is partially reserved and does not have
enough space
+ none of the nodes have enough memory to allocate the region
Range restricted:
- region can be allocated in the specific node requested without
dropping min_addr:
+ the range fully overlaps with the node, and there are adjacent
reserved regions
- region cannot be allocated:
+ range partially overlaps with two different nodes, where the
second node is the requested node
+ range overlaps with multiple nodes along node boundaries, and
the requested node starts after max_addr
+ nid is set to NUMA_NO_NODE and the total range can fit the
region, but the range is split between two nodes and everything
else is reserved
Signed-off-by: Rebecca Mckeever <remckee0@...il.com>
---
.../memblock/tests/alloc_exact_nid_api.c | 465 ++++++++++++++++++
1 file changed, 465 insertions(+)
diff --git a/tools/testing/memblock/tests/alloc_exact_nid_api.c b/tools/testing/memblock/tests/alloc_exact_nid_api.c
index 63279d1e35b1..0f9a84867207 100644
--- a/tools/testing/memblock/tests/alloc_exact_nid_api.c
+++ b/tools/testing/memblock/tests/alloc_exact_nid_api.c
@@ -1746,6 +1746,390 @@ static int alloc_exact_nid_bottom_up_numa_no_overlap_low_check(void)
return 0;
}
+/*
+ * A test that tries to allocate a memory region in a specific NUMA node that
+ * does not have enough memory to allocate a region of the requested size:
+ *
+ * | +-----+ |
+ * | | req | |
+ * +---+-----+----------------------------+
+ *
+ * +---------+
+ * | rgn |
+ * +---------+
+ *
+ * Expect no allocation to happen.
+ */
+static int alloc_exact_nid_numa_small_node_generic_check(void)
+{
+ int nid_req = 1;
+ struct memblock_region *req_node = &memblock.memory.regions[nid_req];
+ void *allocated_ptr = NULL;
+ phys_addr_t size;
+ phys_addr_t min_addr;
+ phys_addr_t max_addr;
+
+ PREFIX_PUSH();
+ setup_numa_memblock(node_fractions);
+
+ size = SZ_2 * req_node->size;
+ min_addr = memblock_start_of_DRAM();
+ max_addr = memblock_end_of_DRAM();
+
+ allocated_ptr = memblock_alloc_exact_nid_raw(size, SMP_CACHE_BYTES,
+ min_addr, max_addr,
+ nid_req);
+
+ ASSERT_EQ(allocated_ptr, NULL);
+
+ test_pass_pop();
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate a memory region in a specific NUMA node that
+ * is fully reserved:
+ *
+ * | +---------+ |
+ * | |requested| |
+ * +--------------+---------+-------------+
+ *
+ * | +---------+ |
+ * | | reserved| |
+ * +--------------+---------+-------------+
+ *
+ * Expect no allocation to happen.
+ */
+static int alloc_exact_nid_numa_node_reserved_generic_check(void)
+{
+ int nid_req = 2;
+ struct memblock_region *req_node = &memblock.memory.regions[nid_req];
+ void *allocated_ptr = NULL;
+ phys_addr_t size;
+ phys_addr_t min_addr;
+ phys_addr_t max_addr;
+
+ PREFIX_PUSH();
+ setup_numa_memblock(node_fractions);
+
+ size = req_node->size;
+ min_addr = memblock_start_of_DRAM();
+ max_addr = memblock_end_of_DRAM();
+
+ memblock_reserve(req_node->base, req_node->size);
+ allocated_ptr = memblock_alloc_exact_nid_raw(size, SMP_CACHE_BYTES,
+ min_addr, max_addr,
+ nid_req);
+
+ ASSERT_EQ(allocated_ptr, NULL);
+
+ test_pass_pop();
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate a memory region in a specific NUMA node that
+ * is partially reserved and does not have enough contiguous memory for the
+ * allocated region:
+ *
+ * | +-----------------------+ |
+ * | | requested | |
+ * +-----------+-----------------------+----+
+ *
+ * | +----------+ |
+ * | | reserved | |
+ * +-----------------+----------+-----------+
+ *
+ * Expect no allocation to happen.
+ */
+static int alloc_exact_nid_numa_part_reserved_fail_generic_check(void)
+{
+ int nid_req = 4;
+ struct memblock_region *req_node = &memblock.memory.regions[nid_req];
+ void *allocated_ptr = NULL;
+ struct region r1;
+ phys_addr_t size;
+ phys_addr_t min_addr;
+ phys_addr_t max_addr;
+
+ PREFIX_PUSH();
+ setup_numa_memblock(node_fractions);
+
+ ASSERT_LE(SZ_4, req_node->size);
+ size = req_node->size / SZ_2;
+ r1.base = req_node->base + (size / SZ_2);
+ r1.size = size;
+
+ min_addr = memblock_start_of_DRAM();
+ max_addr = memblock_end_of_DRAM();
+
+ memblock_reserve(r1.base, r1.size);
+ allocated_ptr = memblock_alloc_exact_nid_raw(size, SMP_CACHE_BYTES,
+ min_addr, max_addr,
+ nid_req);
+
+ ASSERT_EQ(allocated_ptr, NULL);
+
+ test_pass_pop();
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate a memory region that spans over the min_addr
+ * and max_addr range and overlaps with two different nodes, where the second
+ * node is the requested node:
+ *
+ * min_addr
+ * | max_addr
+ * | |
+ * v v
+ * | +--------------------------+---------+ |
+ * | | first node |requested| |
+ * +------+--------------------------+---------+----------------+
+ *
+ * Expect no allocation to happen.
+ */
+static int alloc_exact_nid_numa_split_range_high_generic_check(void)
+{
+ int nid_req = 3;
+ struct memblock_region *req_node = &memblock.memory.regions[nid_req];
+ void *allocated_ptr = NULL;
+ phys_addr_t size = SZ_512;
+ phys_addr_t min_addr;
+ phys_addr_t max_addr;
+
+ PREFIX_PUSH();
+ setup_numa_memblock(node_fractions);
+
+ min_addr = req_node->base - SZ_256;
+ max_addr = min_addr + size;
+
+ allocated_ptr = memblock_alloc_exact_nid_raw(size, SMP_CACHE_BYTES,
+ min_addr, max_addr,
+ nid_req);
+
+ ASSERT_EQ(allocated_ptr, NULL);
+
+ test_pass_pop();
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate memory within min_addr and max_add range when
+ * the requested node and the range do not overlap, and requested node starts
+ * after max_addr. The range overlaps with multiple nodes along node
+ * boundaries:
+ *
+ * min_addr
+ * | max_addr
+ * | |
+ * v v
+ * | +----------+----...----+----------+ +-----------+ |
+ * | | min node | ... | max node | | requested | |
+ * +-----+----------+----...----+----------+--------+-----------+---+
+ *
+ * Expect no allocation to happen.
+ */
+static int alloc_exact_nid_numa_no_overlap_high_generic_check(void)
+{
+ int nid_req = 7;
+ struct memblock_region *min_node = &memblock.memory.regions[2];
+ struct memblock_region *max_node = &memblock.memory.regions[5];
+ void *allocated_ptr = NULL;
+ phys_addr_t size = SZ_64;
+ phys_addr_t max_addr;
+ phys_addr_t min_addr;
+
+ PREFIX_PUSH();
+ setup_numa_memblock(node_fractions);
+
+ min_addr = min_node->base;
+ max_addr = region_end(max_node);
+
+ allocated_ptr = memblock_alloc_exact_nid_raw(size, SMP_CACHE_BYTES,
+ min_addr, max_addr,
+ nid_req);
+
+ ASSERT_EQ(allocated_ptr, NULL);
+
+ test_pass_pop();
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate a memory region in a specific NUMA node that
+ * does not have enough memory to allocate a region of the requested size.
+ * Additionally, none of the nodes have enough memory to allocate the region:
+ *
+ * +-----------------------------------+
+ * | new |
+ * +-----------------------------------+
+ * |-------+-------+-------+-------+-------+-------+-------+-------|
+ * | node0 | node1 | node2 | node3 | node4 | node5 | node6 | node7 |
+ * +-------+-------+-------+-------+-------+-------+-------+-------+
+ *
+ * Expect no allocation to happen.
+ */
+static int alloc_exact_nid_numa_large_region_generic_check(void)
+{
+ int nid_req = 3;
+ void *allocated_ptr = NULL;
+ phys_addr_t size = MEM_SIZE / SZ_2;
+ phys_addr_t min_addr;
+ phys_addr_t max_addr;
+
+ PREFIX_PUSH();
+ setup_numa_memblock(node_fractions);
+
+ min_addr = memblock_start_of_DRAM();
+ max_addr = memblock_end_of_DRAM();
+
+ allocated_ptr = memblock_alloc_exact_nid_raw(size, SMP_CACHE_BYTES,
+ min_addr, max_addr,
+ nid_req);
+ ASSERT_EQ(allocated_ptr, NULL);
+
+ test_pass_pop();
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate memory within min_addr and max_addr range when
+ * there are two reserved regions at the borders. The requested node starts at
+ * min_addr and ends at max_addr and is the same size as the region to be
+ * allocated:
+ *
+ * min_addr
+ * | max_addr
+ * | |
+ * v v
+ * | +-----------+-----------------------+-----------------------|
+ * | | node5 | requested | node7 |
+ * +------+-----------+-----------------------+-----------------------+
+ * + +
+ * | +----+-----------------------+----+ |
+ * | | r2 | new | r1 | |
+ * +-------------+----+-----------------------+----+------------------+
+ *
+ * Expect to merge all of the regions into one. The region counter and total
+ * size fields get updated.
+ */
+static int alloc_exact_nid_numa_reserved_full_merge_generic_check(void)
+{
+ int nid_req = 6;
+ int nid_next = nid_req + 1;
+ struct memblock_region *new_rgn = &memblock.reserved.regions[0];
+ struct memblock_region *req_node = &memblock.memory.regions[nid_req];
+ struct memblock_region *next_node = &memblock.memory.regions[nid_next];
+ void *allocated_ptr = NULL;
+ struct region r1, r2;
+ phys_addr_t size = req_node->size;
+ phys_addr_t total_size;
+ phys_addr_t max_addr;
+ phys_addr_t min_addr;
+
+ PREFIX_PUSH();
+ setup_numa_memblock(node_fractions);
+
+ r1.base = next_node->base;
+ r1.size = SZ_128;
+
+ r2.size = SZ_128;
+ r2.base = r1.base - (size + r2.size);
+
+ total_size = r1.size + r2.size + size;
+ min_addr = r2.base + r2.size;
+ max_addr = r1.base;
+
+ memblock_reserve(r1.base, r1.size);
+ memblock_reserve(r2.base, r2.size);
+
+ allocated_ptr = memblock_alloc_exact_nid_raw(size, SMP_CACHE_BYTES,
+ min_addr, max_addr,
+ nid_req);
+
+ ASSERT_NE(allocated_ptr, NULL);
+ ASSERT_MEM_NE(allocated_ptr, 0, size);
+
+ ASSERT_EQ(new_rgn->size, total_size);
+ ASSERT_EQ(new_rgn->base, r2.base);
+
+ ASSERT_LE(new_rgn->base, req_node->base);
+ ASSERT_LE(region_end(req_node), region_end(new_rgn));
+
+ ASSERT_EQ(memblock.reserved.cnt, 1);
+ ASSERT_EQ(memblock.reserved.total_size, total_size);
+
+ test_pass_pop();
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate memory within min_addr and max_add range,
+ * where the total range can fit the region, but it is split between two nodes
+ * and everything else is reserved. Additionally, nid is set to NUMA_NO_NODE
+ * instead of requesting a specific node:
+ *
+ * +-----------+
+ * | new |
+ * +-----------+
+ * | +---------------------+-----------|
+ * | | prev node | next node |
+ * +------+---------------------+-----------+
+ * + +
+ * |----------------------+ +-----|
+ * | r1 | | r2 |
+ * +----------------------+-----------+-----+
+ * ^ ^
+ * | |
+ * | max_addr
+ * |
+ * min_addr
+ *
+ * Expect no allocation to happen.
+ */
+static int alloc_exact_nid_numa_split_all_reserved_generic_check(void)
+{
+ void *allocated_ptr = NULL;
+ struct memblock_region *next_node = &memblock.memory.regions[7];
+ struct region r1, r2;
+ phys_addr_t size = SZ_256;
+ phys_addr_t max_addr;
+ phys_addr_t min_addr;
+
+ PREFIX_PUSH();
+ setup_numa_memblock(node_fractions);
+
+ r2.base = next_node->base + SZ_128;
+ r2.size = memblock_end_of_DRAM() - r2.base;
+
+ r1.size = MEM_SIZE - (r2.size + size);
+ r1.base = memblock_start_of_DRAM();
+
+ min_addr = r1.base + r1.size;
+ max_addr = r2.base;
+
+ memblock_reserve(r1.base, r1.size);
+ memblock_reserve(r2.base, r2.size);
+
+ allocated_ptr = memblock_alloc_exact_nid_raw(size, SMP_CACHE_BYTES,
+ min_addr, max_addr,
+ NUMA_NO_NODE);
+
+ ASSERT_EQ(allocated_ptr, NULL);
+
+ test_pass_pop();
+
+ return 0;
+}
+
/* Test case wrappers for NUMA tests */
static int alloc_exact_nid_numa_simple_check(void)
{
@@ -1802,6 +2186,78 @@ static int alloc_exact_nid_numa_no_overlap_low_check(void)
return 0;
}
+static int alloc_exact_nid_numa_small_node_check(void)
+{
+ test_print("\tRunning %s...\n", __func__);
+ run_top_down(alloc_exact_nid_numa_small_node_generic_check);
+ run_bottom_up(alloc_exact_nid_numa_small_node_generic_check);
+
+ return 0;
+}
+
+static int alloc_exact_nid_numa_node_reserved_check(void)
+{
+ test_print("\tRunning %s...\n", __func__);
+ run_top_down(alloc_exact_nid_numa_node_reserved_generic_check);
+ run_bottom_up(alloc_exact_nid_numa_node_reserved_generic_check);
+
+ return 0;
+}
+
+static int alloc_exact_nid_numa_part_reserved_fail_check(void)
+{
+ test_print("\tRunning %s...\n", __func__);
+ run_top_down(alloc_exact_nid_numa_part_reserved_fail_generic_check);
+ run_bottom_up(alloc_exact_nid_numa_part_reserved_fail_generic_check);
+
+ return 0;
+}
+
+static int alloc_exact_nid_numa_split_range_high_check(void)
+{
+ test_print("\tRunning %s...\n", __func__);
+ run_top_down(alloc_exact_nid_numa_split_range_high_generic_check);
+ run_bottom_up(alloc_exact_nid_numa_split_range_high_generic_check);
+
+ return 0;
+}
+
+static int alloc_exact_nid_numa_no_overlap_high_check(void)
+{
+ test_print("\tRunning %s...\n", __func__);
+ run_top_down(alloc_exact_nid_numa_no_overlap_high_generic_check);
+ run_bottom_up(alloc_exact_nid_numa_no_overlap_high_generic_check);
+
+ return 0;
+}
+
+static int alloc_exact_nid_numa_large_region_check(void)
+{
+ test_print("\tRunning %s...\n", __func__);
+ run_top_down(alloc_exact_nid_numa_large_region_generic_check);
+ run_bottom_up(alloc_exact_nid_numa_large_region_generic_check);
+
+ return 0;
+}
+
+static int alloc_exact_nid_numa_reserved_full_merge_check(void)
+{
+ test_print("\tRunning %s...\n", __func__);
+ run_top_down(alloc_exact_nid_numa_reserved_full_merge_generic_check);
+ run_bottom_up(alloc_exact_nid_numa_reserved_full_merge_generic_check);
+
+ return 0;
+}
+
+static int alloc_exact_nid_numa_split_all_reserved_check(void)
+{
+ test_print("\tRunning %s...\n", __func__);
+ run_top_down(alloc_exact_nid_numa_split_all_reserved_generic_check);
+ run_bottom_up(alloc_exact_nid_numa_split_all_reserved_generic_check);
+
+ return 0;
+}
+
int __memblock_alloc_exact_nid_numa_checks(void)
{
test_print("Running %s NUMA tests...\n", FUNC_NAME);
@@ -1812,6 +2268,15 @@ int __memblock_alloc_exact_nid_numa_checks(void)
alloc_exact_nid_numa_no_overlap_split_check();
alloc_exact_nid_numa_no_overlap_low_check();
+ alloc_exact_nid_numa_small_node_check();
+ alloc_exact_nid_numa_node_reserved_check();
+ alloc_exact_nid_numa_part_reserved_fail_check();
+ alloc_exact_nid_numa_split_range_high_check();
+ alloc_exact_nid_numa_no_overlap_high_check();
+ alloc_exact_nid_numa_large_region_check();
+ alloc_exact_nid_numa_reserved_full_merge_check();
+ alloc_exact_nid_numa_split_all_reserved_check();
+
return 0;
}
--
2.25.1
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