Re: [PATCH v6 01/13] KVM: selftests: Add a userfaultfd library

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Hi Ricardo,

On Tue, Sep 06, 2022 at 06:09:18PM +0000, Ricardo Koller wrote:
> Move the generic userfaultfd code out of demand_paging_test.c into a
> common library, userfaultfd_util. This library consists of a setup and a
> stop function. The setup function starts a thread for handling page
> faults using the handler callback function. This setup returns a
> uffd_desc object which is then used in the stop function (to wait and
> destroy the threads).
> 
> Reviewed-by: Ben Gardon <bgardon@xxxxxxxxxx>
> Signed-off-by: Ricardo Koller <ricarkol@xxxxxxxxxx>
> ---

[...]

> diff --git a/tools/testing/selftests/kvm/include/userfaultfd_util.h b/tools/testing/selftests/kvm/include/userfaultfd_util.h
> new file mode 100644
> index 000000000000..a1a386c083b0
> --- /dev/null
> +++ b/tools/testing/selftests/kvm/include/userfaultfd_util.h
> @@ -0,0 +1,46 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * KVM userfaultfd util
> + * Adapted from demand_paging_test.c

nit: Don't reference demand_paging_test.c, as it won't make sense unless
the reader also looks at this diff.

> + *
> + * Copyright (C) 2018, Red Hat, Inc.
> + * Copyright (C) 2019-2022 Google LLC
> + */

[...]

> diff --git a/tools/testing/selftests/kvm/lib/userfaultfd_util.c b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> new file mode 100644
> index 000000000000..4395032ccbe4
> --- /dev/null
> +++ b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
> @@ -0,0 +1,187 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * KVM userfaultfd util
> + * Adapted from demand_paging_test.c
> + *
> + * Copyright (C) 2018, Red Hat, Inc.
> + * Copyright (C) 2019, Google, Inc.
> + * Copyright (C) 2022, Google, Inc.

nit: use the same copyrights as the header file.

With that:

Reviewed-by: Oliver Upton <oliver.upton@xxxxxxxxx>



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