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Date:   Mon, 11 Dec 2023 17:53:59 +0100
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Subject: Re: [PATCH v6 5/5] selftests/mm: add UFFDIO_MOVE ioctl test
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To:     Mark Brown <broonie@kernel.org>
Cc:     Suren Baghdasaryan <surenb@google.com>, akpm@linux-foundation.org,
        viro@zeniv.linux.org.uk, brauner@kernel.org, shuah@kernel.org,
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        Liam.Howlett@oracle.com, jannh@google.com, zhangpeng362@huawei.com,
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        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-kselftest@vger.kernel.org, kernel-team@android.com,
        John Hubbard <jhubbard@nvidia.com>,
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From:   David Hildenbrand <david@redhat.com>
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>> Further, the tests are closely related to the given kernel version, they are
>> not some completely separate tests.
> 
> Note that there's a general desire for the tests to *run* with older
> kernels and use whatever feature test mechanisms exist to skip tests
> that won't run.  That's often needed anyway for configurable things.

Agreed.

> 
>> (3) avoids dirtying the tree as a "make headers_install" would, but it also
>> means that each test that makes use of new uapi has to update the relevant
>> headers (what people working on QEMU are used to).
> 
> Note that you can do an out of tree build to avoid dirtying things.

Yes, but apparently the simple "make headers_install" will dirty the kernel.

See (and ideally comment on)

https://lkml.kernel.org/r/20231209020144.244759-1-jhubbard@nvidia.com

-- 
Cheers,

David / dhildenb