On Fri, Jan 13, 2023 at 05:01:43PM +0100, Claudio Migliorelli wrote:
> These tests are aimed at verifying the memblock_alloc_node() to work as expected, so setting the
> correct NUMA node for the new allocated region. The memblock_alloc_node() is mimicked by executing
> the already implemented test function run_memblock_alloc_try_nid() and by setting the flags used
> internally by the memblock_alloc_node(). The core check is between the requested NUMA node and the
> `nid` field inside the memblock_region structure. These two are supposed to be equal in order for
> the test to succeed.
We already have tests that verify that verify that NUMA APIs respect nid
parameter, e.g. alloc_nid_numa_simple_check().
If you'd like to add a test that verifies that memblock_alloc_node() works
as expected, don't mimic it, but use it directly.
When posting patches please format the commit log to wrap at 75 columns (see
Documentation/process/submitting-patches.rst) and use recent Linus' tree as
the base.
> Signed-off-by: Claudio Migliorelli <claudio.migliorelli@xxxxxxxxxxxxxx>
> ---
> tools/testing/memblock/tests/alloc_nid_api.c | 43 ++++++++++++++++++++
> 1 file changed, 43 insertions(+)
>
> diff --git a/tools/testing/memblock/tests/alloc_nid_api.c b/tools/testing/memblock/tests/alloc_nid_api.c
> index 2c2d60f4e3e3..9183e2219c5c 100644
> --- a/tools/testing/memblock/tests/alloc_nid_api.c
> +++ b/tools/testing/memblock/tests/alloc_nid_api.c
> @@ -2483,6 +2483,40 @@ static int alloc_try_nid_numa_split_all_reserved_generic_check(void)
> return 0;
> }
>
> +/*
> + * A test that tries to allocate a memory region through the
> + * memblock_alloc_node() on a NUMA node with id `nid`. The call to the
> + * memblock_alloc_node() is mimicked using the run_memblock_alloc_try_nid()
> + * with appropriate flags, the same used internally by the memblock_alloc_node().
> + * Expected to have the correct NUMA node set for the new region.
> + */
> +static int alloc_node_on_correct_nid_simple_check(void)
> +{
> + int nid_req = 2;
> + void *allocated_ptr = NULL;
> +#ifdef CONFIG_NUMA
> + struct memblock_region *req_node = &memblock.memory.regions[nid_req];
> +#endif
> + phys_addr_t size = SZ_512;
> +
> + PREFIX_PUSH();
> + setup_numa_memblock(node_fractions);
> +
> + allocated_ptr = run_memblock_alloc_try_nid(size, SMP_CACHE_BYTES,
> + MEMBLOCK_LOW_LIMIT, MEMBLOCK_ALLOC_ACCESSIBLE,
> + nid_req);
> +
> + ASSERT_NE(allocated_ptr, NULL);
> + assert_mem_content(allocated_ptr, size, alloc_nid_test_flags);
> +#ifdef CONFIG_NUMA
> + ASSERT_EQ(nid_req, req_node->nid);
> +#endif
> +
> + test_pass_pop();
> +
> + return 0;
> +}
> +
> /* Test case wrappers for NUMA tests */
> static int alloc_try_nid_numa_simple_check(void)
> {
> @@ -2621,6 +2655,14 @@ static int alloc_try_nid_numa_split_all_reserved_check(void)
> return 0;
> }
>
> +static int alloc_try_nid_numa_correct_node_simple_check(void)
> +{
> + test_print("\tRunning %s...\n", __func__);
> + alloc_node_on_correct_nid_simple_check();
> +
> + return 0;
> +}
> +
> int __memblock_alloc_nid_numa_checks(void)
> {
> test_print("Running %s NUMA tests...\n",
> @@ -2640,6 +2682,7 @@ int __memblock_alloc_nid_numa_checks(void)
> alloc_try_nid_numa_large_region_check();
> alloc_try_nid_numa_reserved_full_merge_check();
> alloc_try_nid_numa_split_all_reserved_check();
> + alloc_try_nid_numa_correct_node_simple_check();
>
> return 0;
> }
> --
> 2.39.0
>
--
Sincerely yours,
Mike.
