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Subject: Re: [PATCH V12] mm/debug: Add tests validating architecture page
 table helpers
To:     Qian Cai <cai@lca.pw>, Christophe Leroy <christophe.leroy@c-s.fr>
Cc:     Linux-MM <linux-mm@kvack.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Vlastimil Babka <vbabka@suse.cz>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
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        Jason Gunthorpe <jgg@ziepe.ca>,
        Dan Williams <dan.j.williams@intel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Michal Hocko <mhocko@kernel.org>,
        Mark Rutland <Mark.Rutland@arm.com>,
        Mark Brown <broonie@kernel.org>,
        Steven Price <Steven.Price@arm.com>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        Kees Cook <keescook@chromium.org>,
        Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
        Matthew Wilcox <willy@infradead.org>,
        Sri Krishna chowdary <schowdary@nvidia.com>,
        Dave Hansen <dave.hansen@intel.com>,
        Russell King - ARM Linux <linux@armlinux.org.uk>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Paul Mackerras <paulus@samba.org>,
        Martin Schwidefsky <schwidefsky@de.ibm.com>,
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        Ingo Molnar <mingo@kernel.org>,
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From:   Anshuman Khandual <anshuman.khandual@arm.com>
Message-ID: <ba5a836a-b594-f846-1734-71dcd5d089e6@arm.com>
Date:   Tue, 28 Jan 2020 12:33:41 +0530
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On 01/28/2020 12:06 PM, Qian Cai wrote:
> 
> 
>> On Jan 28, 2020, at 1:17 AM, Christophe Leroy <christophe.leroy@c-s.fr> wrote:
>>
>> It is 'default y' so there is no much risk that it is forgotten, at least all test suites run with 'allyes_defconfig' will trigger the test, so I think it is really a good feature.
> 
> This thing depends on DEBUG_VM which I don’t see it is selected by any defconfig. Am I missing anything?
> 

'allyesconfig' makes 'DEBUG_VM = y' which in turn will enable 'DEBUG_VM_PGTABLE = y'
on platforms that subscribe ARCH_HAS_DEBUG_VM_PGTABLE.