linux-kernel - Re: [PATCH v4] selftest/vm: Move the 128 TB mmap boundary test to the generic VM directory

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Message-ID: <CAOFm3uHbs7_8+YWo9-8AWauK7Hx8E-v8M1w6Du23ZUvHHfFOjw@mail.gmail.com>
Date:   Mon, 8 Jan 2018 17:51:01 +0100
From:   Philippe Ombredanne <pombredanne@...b.com>
To:     "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Cc:     "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        "H . Peter Anvin" <hpa@...or.com>, linux-mm@...ck.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4] selftest/vm: Move the 128 TB mmap boundary test to the
 generic VM directory

Anesh,

On Mon, Jan 8, 2018 at 5:14 PM, Ingo Molnar <mingo@...nel.org> wrote:
>
> * Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com> wrote:
>
>> Architectures like ppc64 do support mmap hint addr based large address space
>> selection. This test can be run on those architectures too. Move the test to
>> selftest/vm so that other archs can use the same.
>>
>> We also add a few new test scenarios in this patch. We do test few boundary
>> condition before we do a high address mmap. ppc64 use the addr limit to validate
>> addr in the fault path. We had bugs in this area w.r.t slb fault handling
>> before we updated the addr limit.
>>
>> We also touch the allocated space to make sure we don't have any bugs in the
>> fault handling path.
>>
>> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>

<snip>

> --- /dev/null
> +++ b/tools/testing/selftests/vm/va_128TBswitch.c
> @@ -0,0 +1,297 @@
> +/*
> + *
> + * Authors: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> + * Authors: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License, version 2, as
> + * published by the Free Software Foundation.
> +
> + * This program is distributed in the hope that it would be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> + *
> + */

Would you mind using an SPDX tag instead of this fine legalese?
See Thomas doc [1] for details.
Thanks!

[1] https://lkml.org/lkml/2017/12/28/323
-- 
Cordially
Philippe Ombredanne