linux-kernel - Re: [PATCH v3 0/5] memblock tests: add tests for memblock_alloc_exact_nid

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Message-ID: <20221031050006.GA15612@sophie>
Date:   Mon, 31 Oct 2022 00:00:06 -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>
Subject: Re: [PATCH v3 0/5] memblock tests: add tests for
 memblock_alloc_exact_nid_raw

Hi Mike,

I noticed that the memblock tree has been updated since I sent this
patch set. Do you want me to send an updated patch set applied on top of
the current tree?

On Wed, Oct 19, 2022 at 01:34:07PM -0500, Rebecca Mckeever wrote:
> These patches add tests for memblock_alloc_exact_nid_raw(). There are two
> sets of tests: range tests and NUMA tests. The range tests use a normal
> (i.e., UMA) simulated physical memory and set the nid to NUMA_NO_NODE. The
> NUMA tests use a simulated physical memory that is set up with multiple
> NUMA nodes. Additionally, most of the NUMA tests set nid != NUMA_NO_NODE.
> 
> For the range tests, the TEST_F_EXACT flag is used to run the same set of
> range tests used for memblock_alloc_try_nid_raw(). The NUMA tests have the
> same setup as the corresponding test for memblock_alloc_try_nid_raw(), but
> several of the memblock_alloc_exact_nid_raw() tests fail to allocate
> memory in setups where the memblock_alloc_try_nid_raw() test would
> allocate memory. Also, some memblock_alloc_exact_nid_raw() tests drop the
> lower limit of the requested range in order to allocate within the
> requested node, but the same setup in a memblock_alloc_try_nid_raw() test
> allocates within the requested range.
> 
> ---
> Changelog
> 
> v1 -> v2
> PATCH 0:
> - Add missing memblock_alloc_exact_nid_raw to subject line
> 
> v2 -> v3
> Based on feedback from David Hildenbrand:
> PATCH 1:
> - alloc_nid_api.c, alloc_nid_api.h, common.h:
>     + Add TEST_F_EXACT flag so that tests in alloc_nid_api.c can be run
>       with that flag to test memblock_alloc_exact_nid_raw()
> - alloc_exact_nid_api.c:
>     + Update to run range tests in alloc_nid_api.c with TEST_F_EXACT flag
>       instead of using a separate set of tests
> - alloc_nid_api.c:
>     + Rename tests and other functions by removing "_try" so that the
>       function names are general enough to refer to any of the
>       memblock_alloc_*nid*() functions of the memblock API
> ---
> 
> Rebecca Mckeever (5):
>   memblock tests: introduce range tests for memblock_alloc_exact_nid_raw
>   memblock tests: add top-down NUMA tests for
>     memblock_alloc_exact_nid_raw
>   memblock tests: add bottom-up NUMA tests for
>     memblock_alloc_exact_nid_raw
>   memblock tests: add generic NUMA tests for
>     memblock_alloc_exact_nid_raw
>   memblock tests: remove completed TODO item
> 
>  tools/testing/memblock/Makefile               |    2 +-
>  tools/testing/memblock/TODO                   |    7 +-
>  tools/testing/memblock/main.c                 |    2 +
>  .../memblock/tests/alloc_exact_nid_api.c      | 1113 +++++++++++++++++
>  .../memblock/tests/alloc_exact_nid_api.h      |   25 +
>  tools/testing/memblock/tests/alloc_nid_api.c  |  542 ++++----
>  tools/testing/memblock/tests/alloc_nid_api.h  |    1 +
>  tools/testing/memblock/tests/common.h         |    2 +
>  8 files changed, 1425 insertions(+), 269 deletions(-)
>  create mode 100644 tools/testing/memblock/tests/alloc_exact_nid_api.c
>  create mode 100644 tools/testing/memblock/tests/alloc_exact_nid_api.h
> 
> -- 
> 2.25.1
> 
Thanks,
Rebecca