linux-kernel - Re: [PATCH v4 3/4] memblock tests: add bottom-up NUMA tests for memblock_alloc_try

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Message-ID: <f00324ed-f852-a695-e2fe-cef97833f9bd@redhat.com>
Date:   Thu, 8 Sep 2022 14:26:18 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Rebecca Mckeever <remckee0@...il.com>,
        Mike Rapoport <rppt@...nel.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 3/4] memblock tests: add bottom-up NUMA tests for
 memblock_alloc_try_nid*

On 04.09.22 06:21, Rebecca Mckeever wrote:
> Add tests for memblock_alloc_try_nid() and memblock_alloc_try_nid_raw()
> where the simulated physical memory is set up with multiple NUMA nodes.
> Additionally, all of these tests set nid != NUMA_NO_NODE. These tests are
> run with a bottom-up allocation direction.
> 
> The tested scenarios are:
> 
> Range unrestricted:
> - region can be allocated in the specific node requested:
>        + there are no previously reserved regions
>        + the requested node is partially reserved but has enough space
> - the specific node requested cannot accommodate the request, but the
>    region can be allocated in a different node:
>        + there are no previously reserved regions, but node is too small
>        + the requested node is fully reserved
>        + the requested node is partially reserved and does not have
>          enough space
> 
> Range restricted:
> - region can be allocated in the specific node requested after dropping
>    min_addr:
>        + range partially overlaps with two different nodes, where the first
>          node is the requested node
>        + range partially overlaps with two different nodes, where the
>          requested node ends before min_addr
> - region cannot be allocated in the specific node requested, but it can be
>    allocated in the requested range:
>        + range overlaps with multiple nodes along node boundaries, and the
>          requested node ends before min_addr
>        + range overlaps with multiple nodes along node boundaries, and the
>          requested node starts after max_addr
> - region cannot be allocated in the specific node requested, but it can be
>    allocated after dropping min_addr:
>        + range partially overlaps with two different nodes, where the
>          second node is the requested node
> 
> Signed-off-by: Rebecca Mckeever <remckee0@...il.com>
> ---
>   tools/testing/memblock/tests/alloc_nid_api.c | 568 +++++++++++++++++++
>   1 file changed, 568 insertions(+)

Acked-by: David Hildenbrand <david@...hat.com>

-- 
Thanks,

David / dhildenb