linux-kernel - Re: [PATCH v6 5/5] selftests/mm: add UFFDIO

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Message-ID: <400c0342-bb28-4dd2-b132-9927c7babec4@sirena.org.uk>
Date:   Mon, 11 Dec 2023 20:01:59 +0000
From:   Mark Brown <broonie@...nel.org>
To:     David Hildenbrand <david@...hat.com>
Cc:     Suren Baghdasaryan <surenb@...gle.com>, akpm@...ux-foundation.org,
        viro@...iv.linux.org.uk, brauner@...nel.org, shuah@...nel.org,
        aarcange@...hat.com, lokeshgidra@...gle.com, peterx@...hat.com,
        ryan.roberts@....com, hughd@...gle.com, mhocko@...e.com,
        axelrasmussen@...gle.com, rppt@...nel.org, willy@...radead.org,
        Liam.Howlett@...cle.com, jannh@...gle.com, zhangpeng362@...wei.com,
        bgeffon@...gle.com, kaleshsingh@...gle.com, ngeoffray@...gle.com,
        jdduke@...gle.com, linux-mm@...ck.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, kernel-team@...roid.com,
        John Hubbard <jhubbard@...dia.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH v6 5/5] selftests/mm: add UFFDIO_MOVE ioctl test

On Mon, Dec 11, 2023 at 07:00:32PM +0100, David Hildenbrand wrote:
> On 11.12.23 18:32, Mark Brown wrote:
> > On Mon, Dec 11, 2023 at 05:53:59PM +0100, David Hildenbrand wrote:

> > > 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.

That sounds sensible, especially if we could arrange to flag when the
specific tests being built need it.

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