linux-kernel - [PATCH v4 0/4] memblock tests: add NUMA tests for memblock_alloc_try

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Date:   Sat,  3 Sep 2022 23:21:04 -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 v4 0/4] memblock tests: add NUMA tests for memblock_alloc_try_nid*

These patches add additional tests for memblock_alloc_try_nid() and
memblock_alloc_try_nid_raw() that use a simulated physical
memory that is set up with multiple NUMA nodes. Additionally, most of
these tests set nid != NUMA_NO_NODE.

To set up a simulated physical memory with multiple NUMA nodes, patch 1
introduces setup_numa_memblock(). This function uses a previously
allocated dummy physical memory. It can be used in place of
setup_memblock() in tests that need to simulate a NUMA system.

These tests are run twice, once for memblock_alloc_try_nid() and once
for memblock_alloc_try_nid_raw(), so that both functions are tested with
the same set of tests. When the tests run memblock_alloc_try_nid(), they
test that the entire memory region is zero. When the tests run
memblock_alloc_try_nid_raw(), they test that the entire memory region is
nonzero.

---
Changelog

v3 -> v4
Based on feedback from David Hildenbrand:
PATCH 1:
- tests/common.h:
    + Remove #define MEM_FACTOR
PATCH 2:
- tests/alloc_nid_api.c:
    + Add missing blank line after alloc_nid_test_flags = flags;
PATCH 2, PATCH 3, PATCH 4:
- tests/alloc_nid_api.c:
    + Define variables in new tests in a single block
    + Change "cleared memory region" to "memory region" in comment blocks
      for new tests

Based on feedback from Mike Rapoport:
PATCH 1:
- tests/common.c:
    + Remove node_sizes[] array
- tests/common.c, tests/common.h:
    + Combine setup_numa_memblock_generic() and setup_numa_memblock():
        * Remove setup_numa_memblock(void)
        * Change setup_numa_memblock_generic() to setup_numa_memblock()
          and remove the factor and node_cnt parameters
        * Change nodes[] parameter to an array containing the denominators
          of the fractions of MEM_SIZE contained in each node
          e.g., if nodes[0] = SZ_8, node 0 will contain 1/8th of MEM_SIZE
PATCH 2:
- tests/alloc_nid_api.c:
    + Add node_fractions[] array:
        * Based on values from node_sizes[] array previously in PATCH 1
        * Update to fit the new nodes[] parameter of setup_numa_memblock()

v2 -> v3
PATCH 2, PATCH 3, PATCH 4:
- tests/alloc_nid_api.c:
    + Edits for consistency between tests and test naming styles:
        * Change "numa_top_down" to "top_down_numa"
        * Change "numa_bottom_up" to "bottom_up_numa"
        * Move "generic" to immediately before "check"
        * alloc_try_nid_bottom_up_numa_small_node_check() and
          alloc_try_nid_bottom_up_numa_node_reserved_check():
            - Separate size definition from its declaration

Updates based on changes to the dependent patch set noted above:
PATCH 2, PATCH 3, PATCH 4:
- tests/alloc_nid_api.c:
    + get_func_testing():
        * Rename to get_memblock_alloc_try_nid_name().
    + Update calls to verify_mem_content() to assert_mem_content().

v1 -> v2
Updates based on changes to the dependent patch set noted above:
PATCH 2, PATCH 3, PATCH 4:
- tests/alloc_nid_api.c:
    + Update calls to verify_mem_content() to include the flags parameter
      required by the new, common verify_mem_content() function.
---

Rebecca Mckeever (4):
  memblock tests: add simulation of physical memory with multiple NUMA
    nodes
  memblock tests: add top-down NUMA tests for memblock_alloc_try_nid*
  memblock tests: add bottom-up NUMA tests for memblock_alloc_try_nid*
  memblock tests: add generic NUMA tests for memblock_alloc_try_nid*

 .../testing/memblock/scripts/Makefile.include |    2 +-
 tools/testing/memblock/tests/alloc_nid_api.c  | 1459 ++++++++++++++++-
 tools/testing/memblock/tests/alloc_nid_api.h  |   16 +
 tools/testing/memblock/tests/common.c         |   29 +
 tools/testing/memblock/tests/common.h         |   22 +-
 5 files changed, 1515 insertions(+), 13 deletions(-)

-- 
2.25.1