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Message-ID: <8a2ce635-58f4-44e1-a646-6527936c5836@redhat.com>
Date:   Mon, 11 Dec 2023 19:00:32 +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,
        aarcange@redhat.com, lokeshgidra@google.com, peterx@redhat.com,
        ryan.roberts@arm.com, hughd@google.com, mhocko@suse.com,
        axelrasmussen@google.com, rppt@kernel.org, willy@infradead.org,
        Liam.Howlett@oracle.com, jannh@google.com, zhangpeng362@huawei.com,
        bgeffon@google.com, kaleshsingh@google.com, ngeoffray@google.com,
        jdduke@google.com, linux-mm@kvack.org,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-kselftest@vger.kernel.org, kernel-team@android.com,
        John Hubbard <jhubbard@nvidia.com>,
        Peter Zijlstra <peterz@infradead.org>
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From:   David Hildenbrand <david@redhat.com>
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On 11.12.23 18:32, Mark Brown wrote:
> On Mon, Dec 11, 2023 at 05:53:59PM +0100, David Hildenbrand wrote:
> 
>>>> (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
> 
> I mean, I guess people who don't want to install the headers are just
> not going to be able to build a bunch of tests?  There definitely are a
> bunch of tests where it's not needed so I can see why people would not
> like being forced to do the headers step if they're only interested in
> those tests.

Yes. And before that, people mostly had no clue that headers had to be 
installed in order to compile successfully.

So maybe a warning to give at least some hint might be reasonable.

-- 
Cheers,

David / dhildenb