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Date: Wed, 24 Jun 2020 13:48:08 +0200
From: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Subject: Re: [PATCH V3 0/4] mm/debug_vm_pgtable: Add some more tests
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To: Alexander Gordeev <agordeev@linux.ibm.com>, Anshuman Khandual <anshuman.khandual@arm.com>
Cc: linux-mm@kvack.org, christophe.leroy@c-s.fr, ziy@nvidia.com, Jonathan Corbet <corbet@lwn.net>, Andrew Morton <akpm@linux-foundation.org>, Mike Rapoport <rppt@linux.ibm.com>, Vineet Gupta <vgupta@synopsys.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au>, Heiko Carstens <heiko.carstens@de.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>, Christian Borntraeger <borntraeger@de.ibm.com>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, "H. Peter
 Anvin" <hpa@zytor.com>, "Kirill A . Shutemov" <kirill@shutemov.name>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-riscv@lists.infradead.org, x86@kernel.org, linux-doc@vger.kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, Christophe Leroy <christophe.leroy@csgroup.eu>
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On Wed, 24 Jun 2020 13:05:39 +0200
Alexander Gordeev <agordeev@linux.ibm.com> wrote:

> On Wed, Jun 24, 2020 at 08:43:10AM +0530, Anshuman Khandual wrote:
> 
> [...]
> 
> > Hello Gerald/Christophe/Vineet,
> > 
> > It would be really great if you could give this series a quick test
> > on s390/ppc/arc platforms respectively. Thank you.
> 
> That worked for me with the default and debug s390 configurations.
> Would you like to try with some particular options or combinations
> of the options?

It will be enabled automatically on all archs that set
ARCH_HAS_DEBUG_VM_PGTABLE, which we do for s390 unconditionally.
Also, DEBUG_VM has to be set, which we have only in the debug config.
So only the s390 debug config will have it enabled, you can check
dmesg for "debug_vm_pgtable" to see when / where it was run, and if it
triggered any warnings.

I also checked with the v3 series, and it works fine for s390.